From 7f66c24f8d4031ab529ee6588334b151b3618086 Mon Sep 17 00:00:00 2001
From: mn3981 <christopher.ashe@ukaea.uk>
Date: Thu, 4 Jun 2026 10:27:09 +0100
Subject: [PATCH 01/33] Move elbow coeffieicnt calc from blanket to pumping

---
 .../source/eng-models/blanket_overview.md     | 22 ------
 .../eng-models/generic_methods/pumping.md     | 28 ++++++-
 process/models/blankets/blanket_library.py    | 76 +------------------
 process/models/engineering/pumping.py         | 66 ++++++++++++++++
 .../models/blankets/test_blanket_library.py   | 21 -----
 tests/unit/models/engineering/test_pumping.py | 14 ++++
 6 files changed, 110 insertions(+), 117 deletions(-)

diff --git a/documentation/source/eng-models/blanket_overview.md b/documentation/source/eng-models/blanket_overview.md
index 66a84b15f7..fa0de10aa6 100644
--- a/documentation/source/eng-models/blanket_overview.md
+++ b/documentation/source/eng-models/blanket_overview.md
@@ -78,27 +78,5 @@ $$
 
 -------------------
 
-### Pipe bend elbow coefficient | `elbow_coeff()`
 
-This function calculates the elbow bend coefficients for pressure drop calculations.
-
-$$
-a = 1.0 \quad \text{if} \ \theta = 90^{\circ} \\
-a = 0.9 \times \sin{\left(\frac{\theta \pi}{180^{\circ}}\right)} \quad \text{if} \ \theta < 70^{\circ} \\
-a = 0.7 + 0.35 \times \sin{\left(\frac{\theta}{90^{\circ}} \times \frac{\pi}{180^{\circ}}\right)} \quad \text{if} \ \theta > 90^{\circ} \\
-$$
-
-where $\theta$ is the angle of the pipe bend.
-
-$$
-b = \frac{0.21}{\sqrt{\frac{R_{\text{elbow}}}{D_{\text{pipe}}}}}\quad \text{if} \ \frac{R_{\text{elbow}}}{D_{\text{pipe}}} \ge 1 \\
-b = \frac{0.21}{\left(\frac{R_{\text{elbow}}}{D_{\text{pipe}}}\right)^{2.5}}\quad \text{if} \ \frac{R_{\text{elbow}}}{D_{\text{pipe}}} \le 1 \\
-\text{else} \quad b =0.21
-$$
-
-The elbow coefficient is given by:
-
-$$
-ab + \left( f_{\text{D}} \times \frac{R_{\text{elbow}}}{D_{\text{pipe}}}\right) \times \theta \times \left(\frac{\pi}{180^{\circ}}\right)
-$$
 
diff --git a/documentation/source/eng-models/generic_methods/pumping.md b/documentation/source/eng-models/generic_methods/pumping.md
index a4822ba00b..7bd3a1dc4e 100644
--- a/documentation/source/eng-models/generic_methods/pumping.md
+++ b/documentation/source/eng-models/generic_methods/pumping.md
@@ -61,4 +61,30 @@ where $\rho$ is the coolant density and $\mu$ is the coolant viscosity.
 
     $$
     h = \frac{\mathrm{Nu_D}k}{2r_{\text{channel}}}
-    $$
\ No newline at end of file
+    $$
+
+-------------------------
+
+## Pipe bend elbow coefficient | `elbow_coeff()`
+
+This function calculates the elbow bend coefficients for pressure drop calculations.
+
+$$
+a = 1.0 \quad \text{if} \ \theta = 90^{\circ} \\
+a = 0.9 \times \sin{\left(\frac{\theta \pi}{180^{\circ}}\right)} \quad \text{if} \ \theta < 70^{\circ} \\
+a = 0.7 + 0.35 \times \sin{\left(\frac{\theta}{90^{\circ}} \times \frac{\pi}{180^{\circ}}\right)} \quad \text{if} \ \theta > 90^{\circ} \\
+$$
+
+where $\theta$ is the angle of the pipe bend.
+
+$$
+b = \frac{0.21}{\sqrt{\frac{R_{\text{elbow}}}{D_{\text{pipe}}}}}\quad \text{if} \ \frac{R_{\text{elbow}}}{D_{\text{pipe}}} \ge 1 \\
+b = \frac{0.21}{\left(\frac{R_{\text{elbow}}}{D_{\text{pipe}}}\right)^{2.5}}\quad \text{if} \ \frac{R_{\text{elbow}}}{D_{\text{pipe}}} \le 1 \\
+\text{else} \quad b =0.21
+$$
+
+The elbow coefficient is given by:
+
+$$
+ab + \left( f_{\text{D}} \times \frac{R_{\text{elbow}}}{D_{\text{pipe}}}\right) \times \theta \times \left(\frac{\pi}{180^{\circ}}\right)
+$$
\ No newline at end of file
diff --git a/process/models/blankets/blanket_library.py b/process/models/blankets/blanket_library.py
index ec293bed12..b4a154e363 100644
--- a/process/models/blankets/blanket_library.py
+++ b/process/models/blankets/blanket_library.py
@@ -24,6 +24,7 @@
     CoolantType,
     calculate_reynolds_number,
     darcy_friction_haaland,
+    elbow_coeff,
 )
 from process.models.power import PumpingPowerModelTypes
 
@@ -3243,7 +3244,7 @@ def coolant_friction_pressure_drop(
         f_straight = darcy_friction_factor * len_pipe / dia_pipe
 
         # 90 degree elbow pressure drop coefficient
-        f_elbow_90 = self.elbow_coeff(
+        f_elbow_90 = elbow_coeff(
             radius_pipe_elbow=radius_pipe_90_deg_bend,
             deg_pipe_elbow=90.0,
             darcy_friction=darcy_friction_factor,
@@ -3251,7 +3252,7 @@ def coolant_friction_pressure_drop(
         )
 
         # 180 degree elbow pressure drop coefficient
-        f_elbow_180 = self.elbow_coeff(
+        f_elbow_180 = elbow_coeff(
             radius_pipe_elbow=radius_pipe_180_deg_bend,
             deg_pipe_elbow=180.0,
             darcy_friction=darcy_friction_factor,
@@ -3367,77 +3368,6 @@ def pipe_hydraulic_diameter(self, i_channel_shape):
             f"i_channel_shape ={i_channel_shape} is an invalid option."
         )
 
-    @staticmethod
-    def elbow_coeff(
-        radius_pipe_elbow: float,
-        deg_pipe_elbow: float,
-        darcy_friction: float,
-        dia_pipe: float,
-    ) -> float:
-        """Calculates elbow bend coefficients for pressure drop calculations.
-
-        Parameters
-        ----------
-        radius_pipe_elbow : float
-            Pipe elbow radius (m)
-        deg_pipe_elbow : float
-            Pipe elbow angle (degrees)
-        darcy_friction : float
-            Darcy friction factor
-        dia_pipe : float
-            Pipe diameter (m)
-
-        Returns
-        -------
-        float
-            Elbow coefficient for pressure drop calculation
-
-        Raises
-        ------
-        ProcessValueError
-            If 70 <= elbow angle(deg) <= 100 as there is no formula
-            for this range
-
-        References
-        ----------
-        - [Ide1969] Idel'Cik, I. E. (1969), Memento des pertes de charge,
-        Collection de la Direction des Etudes et Recherches d'Electricité de France.
-        """
-        if deg_pipe_elbow == 90:
-            a = 1.0
-        elif deg_pipe_elbow < 70:
-            a = 0.9 * np.sin(deg_pipe_elbow * np.pi / 180.0)
-        elif deg_pipe_elbow > 100:
-            a = 0.7 + (0.35 * np.sin((deg_pipe_elbow / 90.0) * (np.pi / 180.0)))
-        else:
-            raise ProcessValueError(
-                "No formula for 70 <= elbow angle(deg) <= 100, "
-                "only 90 deg option available in this range."
-            )
-
-        r_ratio = radius_pipe_elbow / dia_pipe
-
-        if r_ratio > 1:
-            b = 0.21 / r_ratio**0.5
-        elif r_ratio < 1:
-            b = 0.21 / r_ratio**2.5
-        else:
-            b = 0.21
-
-        # Singularity
-        ximt = a * b
-
-        # Friction
-        xift = (
-            (np.pi / 180.0)
-            * darcy_friction
-            * (radius_pipe_elbow / dia_pipe)
-            * deg_pipe_elbow
-        )
-
-        # Elbow Coefficient
-        return ximt + xift
-
     def coolant_pumping_power(
         self,
         output: bool,
diff --git a/process/models/engineering/pumping.py b/process/models/engineering/pumping.py
index 7ee6e0e29f..ea8fdb5649 100644
--- a/process/models/engineering/pumping.py
+++ b/process/models/engineering/pumping.py
@@ -41,6 +41,8 @@ def full_name(self):
         return self._full_name_
 
 
+from process.core.exceptions import ProcessValueError
+
 logger = logging.getLogger(__name__)
 
 
@@ -200,3 +202,67 @@ def calculate_reynolds_number(
 
     # Calculate Reynolds number
     return den_coolant * vel_coolant * diameter / visc_coolant
+
+
+def elbow_coeff(
+    radius_pipe_elbow: float,
+    deg_pipe_elbow: float,
+    darcy_friction: float,
+    dia_pipe: float,
+) -> float:
+    """Calculates elbow bend coefficients for pressure drop calculations.
+
+    Parameters
+    ----------
+    radius_pipe_elbow : float
+        Pipe elbow radius (m)
+    deg_pipe_elbow : float
+        Pipe elbow angle (degrees)
+    darcy_friction : float
+        Darcy friction factor
+    dia_pipe : float
+        Pipe diameter (m)
+
+    Returns
+    -------
+    float
+        Elbow coefficient for pressure drop calculation
+
+    References
+    ----------
+    [1] Idel'Cik, I. E. (1969), Memento des pertes de charge,
+    Collection de la Direction des Etudes et Recherches d'Electricité de France.
+    """
+    if deg_pipe_elbow == 90:
+        a = 1.0
+    elif deg_pipe_elbow < 70:
+        a = 0.9 * np.sin(deg_pipe_elbow * np.pi / 180.0)
+    elif deg_pipe_elbow > 100:
+        a = 0.7 + (0.35 * np.sin((deg_pipe_elbow / 90.0) * (np.pi / 180.0)))
+    else:
+        raise ProcessValueError(
+            "No formula for 70 <= elbow angle(deg) <= 100, only 90 deg option available in this range."
+        )
+
+    r_ratio = radius_pipe_elbow / dia_pipe
+
+    if r_ratio > 1:
+        b = 0.21 / r_ratio**0.5
+    elif r_ratio < 1:
+        b = 0.21 / r_ratio**2.5
+    else:
+        b = 0.21
+
+    # Singularity
+    ximt = a * b
+
+    # Friction
+    xift = (
+        (np.pi / 180.0)
+        * darcy_friction
+        * (radius_pipe_elbow / dia_pipe)
+        * deg_pipe_elbow
+    )
+
+    # Elbow Coefficient
+    return ximt + xift
diff --git a/tests/unit/models/blankets/test_blanket_library.py b/tests/unit/models/blankets/test_blanket_library.py
index 3f05117eff..168c165dfa 100644
--- a/tests/unit/models/blankets/test_blanket_library.py
+++ b/tests/unit/models/blankets/test_blanket_library.py
@@ -1606,27 +1606,6 @@ def test_hydraulic_diameter(monkeypatch, blanket_library):
     assert blanket_library.pipe_hydraulic_diameter(2) == pytest.approx(1.0)
 
 
-def test_elbow_coeff(blanket_library):
-    """
-    Test for elbow_coeff function.
-    """
-    # input = r_elbow, ang_elbow, lambda, dh
-    assert blanket_library.elbow_coeff(1, 0, 1, 1) == pytest.approx(0.0, rel=1e-3)
-    assert blanket_library.elbow_coeff(1, 90, 1, 1) == pytest.approx(
-        1.7807963267948965, rel=1e-3
-    )
-    assert blanket_library.elbow_coeff(1, 180, 1, 1) == pytest.approx(
-        3.291157766597427, rel=1e-3
-    )
-    assert blanket_library.elbow_coeff(1, 90, 1, 0.1) == pytest.approx(
-        15.774371098812502, rel=1e-3
-    )
-    assert blanket_library.elbow_coeff(0.1, 90, 1, 1) == pytest.approx(66.57, rel=1e-3)
-    assert blanket_library.elbow_coeff(1, 90, 0.1, 1) == pytest.approx(
-        0.3670796326794896, rel=1e-3
-    )
-
-
 def test_flow_velocity(monkeypatch, blanket_library):
     """
     Test for flow_velocity function.
diff --git a/tests/unit/models/engineering/test_pumping.py b/tests/unit/models/engineering/test_pumping.py
index 6b1898bb1a..5e85511dda 100644
--- a/tests/unit/models/engineering/test_pumping.py
+++ b/tests/unit/models/engineering/test_pumping.py
@@ -3,6 +3,7 @@
 from process.models.engineering.pumping import (
     calculate_reynolds_number,
     darcy_friction_haaland,
+    elbow_coeff,
     gnielinski_heat_transfer_coefficient,
 )
 
@@ -33,3 +34,16 @@ def test_calculate_reynolds_number():
         radius_channel=0.0060000000000000001,
         visc_coolant=4.0416219836935569e-05,
     ) == pytest.approx(33302.602975971815)
+
+
+def test_elbow_coeff():
+    """
+    Test for elbow_coeff function.
+    """
+    # input = r_elbow, ang_elbow, lambda, dh
+    assert elbow_coeff(1, 0, 1, 1) == pytest.approx(0.0, rel=1e-3)
+    assert elbow_coeff(1, 90, 1, 1) == pytest.approx(1.7807963267948965, rel=1e-3)
+    assert elbow_coeff(1, 180, 1, 1) == pytest.approx(3.291157766597427, rel=1e-3)
+    assert elbow_coeff(1, 90, 1, 0.1) == pytest.approx(15.774371098812502, rel=1e-3)
+    assert elbow_coeff(0.1, 90, 1, 1) == pytest.approx(66.57, rel=1e-3)
+    assert elbow_coeff(1, 90, 0.1, 1) == pytest.approx(0.3670796326794896, rel=1e-3)

From 693d5ca898b6dc62ba5df7c27517ce5b8fd680b4 Mon Sep 17 00:00:00 2001
From: mn3981 <christopher.ashe@ukaea.uk>
Date: Thu, 4 Jun 2026 10:40:41 +0100
Subject: [PATCH 02/33] Add coolant properties to BlanketData class

---
 process/data_structure/blanket_variables.py | 30 +++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/process/data_structure/blanket_variables.py b/process/data_structure/blanket_variables.py
index 05d2b9c7cf..cff770b8e8 100644
--- a/process/data_structure/blanket_variables.py
+++ b/process/data_structure/blanket_variables.py
@@ -200,5 +200,35 @@ class BlanketData:
     f_deg_blkt_inboard_poloidal_plasma: float = 0.0
     """Fraction of inboard blanket poloidal angle subtended by plasma (degrees)"""
 
+    reynolds_blkt_inboard_coolant: float = 0.0
+    """Inboard blanket coolant Reynolds number"""
+
+    reynolds_blkt_outboard_coolant: float = 0.0
+    """Outboard blanket coolant Reynolds number"""
+
+    darcy_frict_blkt_inboard_coolant: float = 0.0
+    """Inboard blanket coolant Darcy friction factor"""
+
+    darcy_frict_blkt_outboard_coolant: float = 0.0
+    """Outboard blanket coolant Darcy friction factor"""
+
+    f_elbow_blkt_inboard_90_bend: float = 0.0
+    """Inboard blanket coolant 90 degree bend loss coefficient"""
+
+    f_elbow_blkt_outboard_90_bend: float = 0.0
+    """Outboard blanket coolant 90 degree bend loss coefficient"""
+
+    f_elbow_blkt_inboard_180_bend: float = 0.0
+    """Inboard blanket coolant 180 degree bend loss coefficient"""
+
+    f_elbow_blkt_outboard_180_bend: float = 0.0
+    """Outboard blanket coolant 180 degree bend loss coefficient"""
+
+    len_blkt_inboard_coolant_channel_straight_total: float = 0.0
+    """Total length of inboard blanket coolant channel straight sections (m)"""
+
+    len_blkt_outboard_coolant_channel_straight_total: float = 0.0
+    """Total length of outboard blanket coolant channel straight sections (m)"""
+
 
 CREATE_DICTS_FROM_DATACLASS = BlanketData

From f3bcda6afbb4530ba1e3e48af61e56843a16b2ce Mon Sep 17 00:00:00 2001
From: mn3981 <christopher.ashe@ukaea.uk>
Date: Thu, 4 Jun 2026 16:21:28 +0100
Subject: [PATCH 03/33] Add coolant friction loss parameters and output
 functions for blanket models

---
 process/data_structure/blanket_variables.py   |  42 ++
 process/main.py                               |   2 +
 process/models/blankets/blanket_library.py    | 478 ++++++++++++------
 process/models/engineering/pumping.py         |  33 ++
 .../models/blankets/test_blanket_library.py   |   1 -
 5 files changed, 403 insertions(+), 153 deletions(-)

diff --git a/process/data_structure/blanket_variables.py b/process/data_structure/blanket_variables.py
index cff770b8e8..43452b356e 100644
--- a/process/data_structure/blanket_variables.py
+++ b/process/data_structure/blanket_variables.py
@@ -224,6 +224,48 @@ class BlanketData:
     f_elbow_blkt_outboard_180_bend: float = 0.0
     """Outboard blanket coolant 180 degree bend loss coefficient"""
 
+    f_straight_blkt_inboard_coolant: float = 0.0
+    """Inboard blanket coolant straight length loss coefficient"""
+
+    f_straight_blkt_outboard_coolant: float = 0.0
+    """Outboard blanket coolant straight length loss coefficient"""
+
+    dpres_blkt_inboard_coolant_channel_straight_total: float = 0.0
+    """Total pressure drop in inboard blanket coolant channel straight sections (Pa)"""
+
+    dpres_blkt_outboard_coolant_channel_straight_total: float = 0.0
+    """Total pressure drop in outboard blanket coolant channel straight sections (Pa)"""
+
+    dpres_blkt_inboard_coolant_channel_90_bends_total: float = 0.0
+    """Total pressure drop in inboard blanket coolant channel 90 degree bends (Pa)"""
+
+    dpres_blkt_outboard_coolant_channel_90_bends_total: float = 0.0
+    """Total pressure drop in outboard blanket coolant channel 90 degree bends (Pa)"""
+
+    dpres_blkt_inboard_coolant_channel_180_bends_total: float = 0.0
+    """Total pressure drop in inboard blanket coolant channel 180 degree bends (Pa)"""
+
+    dpres_blkt_outboard_coolant_channel_180_bends_total: float = 0.0
+    """Total pressure drop in outboard blanket coolant channel 180 degree bends (Pa)"""
+
+    dpres_blkt_inboard_coolant_channel_90_bend: float = 0.0
+    """Pressure drop in inboard blanket coolant channel 90 degree bend (Pa)"""
+
+    dpres_blkt_outboard_coolant_channel_90_bend: float = 0.0
+    """Pressure drop in outboard blanket coolant channel 90 degree bend (Pa)"""
+
+    dpres_blkt_inboard_coolant_channel_180_bend: float = 0.0
+    """Pressure drop in inboard blanket coolant channel 180 degree bend (Pa)"""
+
+    dpres_blkt_outboard_coolant_channel_180_bend: float = 0.0
+    """Pressure drop in outboard blanket coolant channel 180 degree bend (Pa)"""
+
+    dpres_blkt_inboard_bends_total: float = 0.0
+    """Total pressure drop in inboard blanket coolant channel bends (Pa)"""
+
+    dpres_blkt_outboard_bends_total: float = 0.0
+    """Total pressure drop in outboard blanket coolant channel bends (Pa)"""
+
     len_blkt_inboard_coolant_channel_straight_total: float = 0.0
     """Total length of inboard blanket coolant channel straight sections (m)"""
 
diff --git a/process/main.py b/process/main.py
index 2f8041c5ee..4b8eec38cd 100644
--- a/process/main.py
+++ b/process/main.py
@@ -951,6 +951,8 @@ def write(self, data, _outfile):
             # DCLL model
             self.dcll.output()
 
+        self.blanket_library.output_blkt_pumping_variables()
+
         # FISPACT and LOCA model (not used)- removed
 
         # Power model
diff --git a/process/models/blankets/blanket_library.py b/process/models/blankets/blanket_library.py
index b4a154e363..d85aebb356 100644
--- a/process/models/blankets/blanket_library.py
+++ b/process/models/blankets/blanket_library.py
@@ -22,6 +22,7 @@
 )
 from process.models.engineering.pumping import (
     CoolantType,
+    CoolantFrictionLossParameters,
     calculate_reynolds_number,
     darcy_friction_haaland,
     elbow_coeff,
@@ -1425,7 +1426,7 @@ def thermo_hydraulic_model_pressure_drop_calculations(self, output: bool):
             b_bz_liq=self.data.fwbs.b_bz_liq,
         )
 
-        dpres_fw_inboard_coolant = self.total_pressure_drop(
+        dpres_fw_inboard_coolant, fw_inboard_friction_params = self.total_pressure_drop(
             output,
             icoolpump=1,
             vel_coolant=vel_fw_inboard_coolant,
@@ -1440,19 +1441,21 @@ def thermo_hydraulic_model_pressure_drop_calculations(self, output: bool):
             label="Inboard first wall",
         )
 
-        dpres_fw_outboard_coolant = self.total_pressure_drop(
-            output,
-            icoolpump=1,
-            vel_coolant=vel_fw_outboard_coolant,
-            len_pipe=self.data.fwbs.len_fw_channel,
-            n_pipe_90_deg_bends=N_FW_PIPE_90_DEG_BENDS,
-            n_pipe_180_deg_bends=N_FW_PIPE_180_DEG_BENDS,
-            den_coolant=self.data.fwbs.den_fw_coolant,
-            visc_coolant_dynamic=self.data.fwbs.visc_fw_coolant,
-            coolant_electrical_conductivity=0.0e0,
-            pol_channel_length=pollengo,
-            nopolchan=npoltoto,
-            label="Outboard first wall",
+        dpres_fw_outboard_coolant, fw_outboard_friction_params = (
+            self.total_pressure_drop(
+                output,
+                icoolpump=1,
+                vel_coolant=vel_fw_outboard_coolant,
+                len_pipe=self.data.fwbs.len_fw_channel,
+                n_pipe_90_deg_bends=N_FW_PIPE_90_DEG_BENDS,
+                n_pipe_180_deg_bends=N_FW_PIPE_180_DEG_BENDS,
+                den_coolant=self.data.fwbs.den_fw_coolant,
+                visc_coolant_dynamic=self.data.fwbs.visc_fw_coolant,
+                coolant_electrical_conductivity=0.0e0,
+                pol_channel_length=pollengo,
+                nopolchan=npoltoto,
+                label="Outboard first wall",
+            )
         )
 
         # BB Presure Drops ###############
@@ -1473,43 +1476,85 @@ def thermo_hydraulic_model_pressure_drop_calculations(self, output: bool):
             npoltoti = self.data.fwbs.nopol * npblkti_liq
         npoltoto = self.data.fwbs.nopol * npblkto_liq
 
-        dpres_blkt_outboard_coolant = self.total_pressure_drop(
-            output,
-            icoolpump=1,
-            vel_coolant=self.data.blanket.vel_blkt_outboard_coolant,
-            len_pipe=self.data.blanket.len_blkt_outboard_channel_total,
-            n_pipe_90_deg_bends=N_BLKT_PIPE_90_DEG_BENDS,
-            n_pipe_180_deg_bends=N_BLKT_PIPE_180_DEG_BENDS,
-            den_coolant=self.data.fwbs.den_blkt_coolant,
-            visc_coolant_dynamic=self.data.fwbs.visc_blkt_coolant,
-            coolant_electrical_conductivity=0.0e0,
-            pol_channel_length=pollengo,
-            nopolchan=npoltoto,
-            label="Outboard blanket",
-        )
-
-        if (
-            self.data.build.i_blkt_inboard
-            == InboardBlanketConfiguration.INBOARD_BLANKET_PRESENT
-        ):
-            dpres_blkt_inboard_coolant = self.total_pressure_drop(
+        dpres_blkt_outboard_coolant, blkt_outboard_friction_params = (
+            self.total_pressure_drop(
                 output,
                 icoolpump=1,
-                vel_coolant=self.data.blanket.vel_blkt_inboard_coolant,
-                len_pipe=self.data.blanket.len_blkt_inboard_channel_total,
+                vel_coolant=self.data.blanket.vel_blkt_outboard_coolant,
+                len_pipe=self.data.blanket.len_blkt_outboard_channel_total,
                 n_pipe_90_deg_bends=N_BLKT_PIPE_90_DEG_BENDS,
                 n_pipe_180_deg_bends=N_BLKT_PIPE_180_DEG_BENDS,
                 den_coolant=self.data.fwbs.den_blkt_coolant,
                 visc_coolant_dynamic=self.data.fwbs.visc_blkt_coolant,
                 coolant_electrical_conductivity=0.0e0,
-                pol_channel_length=pollengi,
-                nopolchan=npoltoti,
-                label="Inboard blanket",
+                pol_channel_length=pollengo,
+                nopolchan=npoltoto,
+                label="Outboard blanket",
+            )
+        )
+
+        self.data.blanket.dpres_blkt_outboard_coolant_channel_straight_total = (
+            blkt_outboard_friction_params.dpres_straight
+        )
+        self.data.blanket.dpres_blkt_outboard_coolant_channel_90_bend = (
+            blkt_outboard_friction_params.dpres_90
+        )
+        self.data.blanket.dpres_blkt_outboard_coolant_channel_90_bends_total = (
+            blkt_outboard_friction_params.dpres_90_total
+        )
+        self.data.blanket.dpres_blkt_outboard_coolant_channel_180_bend = (
+            blkt_outboard_friction_params.dpres_180
+        )
+        self.data.blanket.dpres_blkt_outboard_coolant_channel_180_bends_total = (
+            blkt_outboard_friction_params.dpres_180_total
+        )
+        self.data.blanket.dpres_blkt_outboard_bends_total = (
+            blkt_outboard_friction_params.dpres_bends_total
+        )
+
+        self.data.blanket.reynolds_blkt_outboard_coolant = (
+            blkt_outboard_friction_params.reynolds_number
+        )
+        self.data.blanket.darcy_frict_blkt_outboard_coolant = (
+            blkt_outboard_friction_params.darcy_friction_factor
+        )
+        self.data.blanket.f_straight_blkt_outboard_coolant = (
+            blkt_outboard_friction_params.f_straight
+        )
+        self.data.blanket.len_blkt_outboard_coolant_channel_straight_total = (
+            blkt_outboard_friction_params.len_straight
+        )
+        self.data.blanket.f_elbow_blkt_outboard_90_bend = (
+            blkt_outboard_friction_params.f_elbow_90
+        )
+        self.data.blanket.f_elbow_blkt_outboard_180_bend = (
+            blkt_outboard_friction_params.f_elbow_180
+        )
+
+        if (
+            self.data.build.i_blkt_inboard
+            == InboardBlanketConfiguration.INBOARD_BLANKET_PRESENT
+        ):
+            dpres_blkt_inboard_coolant, blkt_inboard_friction_params = (
+                self.total_pressure_drop(
+                    output,
+                    icoolpump=1,
+                    vel_coolant=self.data.blanket.vel_blkt_inboard_coolant,
+                    len_pipe=self.data.blanket.len_blkt_inboard_channel_total,
+                    n_pipe_90_deg_bends=N_BLKT_PIPE_90_DEG_BENDS,
+                    n_pipe_180_deg_bends=N_BLKT_PIPE_180_DEG_BENDS,
+                    den_coolant=self.data.fwbs.den_blkt_coolant,
+                    visc_coolant_dynamic=self.data.fwbs.visc_blkt_coolant,
+                    coolant_electrical_conductivity=0.0e0,
+                    pol_channel_length=pollengi,
+                    nopolchan=npoltoti,
+                    label="Inboard blanket",
+                )
             )
 
         # If the blanket has a liquid metal breeder...
         if self.data.fwbs.i_blkt_dual_coolant > 0:
-            deltap_blo_liq = self.total_pressure_drop(
+            deltap_blo_liq, _ = self.total_pressure_drop(
                 output,
                 icoolpump=2,
                 vel_coolant=velblkto_liq,
@@ -1527,7 +1572,7 @@ def thermo_hydraulic_model_pressure_drop_calculations(self, output: bool):
                 self.data.build.i_blkt_inboard
                 == InboardBlanketConfiguration.INBOARD_BLANKET_PRESENT
             ):
-                deltap_bli_liq = self.total_pressure_drop(
+                deltap_bli_liq, _ = self.total_pressure_drop(
                     output,
                     icoolpump=2,
                     vel_coolant=velblkti_liq,
@@ -2473,6 +2518,7 @@ def thermo_hydraulic_model(self, output: bool):
             deltap = self.thermo_hydraulic_model_pressure_drop_calculations(
                 output=output
             )
+            print(deltap)
             deltap_fwi = deltap[0]
             deltap_fwo = deltap[1]
             deltap_blo = deltap[2]
@@ -2903,9 +2949,8 @@ def total_pressure_drop(
         pol_channel_length: float,
         nopolchan: int,
         label: str,
-    ) -> float:
-        """Calculate the total pressure drop (Pa) for coolant flow in the
-        first wall (FW) and breeding blanket (BZ).
+    ) -> tuple[float, CoolantFrictionLossParameters]:
+        """Calculate the total pressure drop (Pa) for coolant flow in the first wall (FW) and breeding blanket (BZ).
 
         This includes frictional losses and, for liquid breeder coolants,
         magnetohydrodynamic (MHD) losses.
@@ -2939,8 +2984,8 @@ def total_pressure_drop(
 
         Returns
         -------
-        float
-            Total pressure drop (Pa).
+        tuple
+            Total pressure drop (Pa) and friction loss parameters.
         """
         radius_pipe_90_deg_bend, radius_pipe_180_deg_bend = calculate_pipe_bend_radius(
             i_ps=icoolpump,
@@ -2949,19 +2994,20 @@ def total_pressure_drop(
         )
 
         # Friction - for all coolants
-        dpres_friction = self.coolant_friction_pressure_drop(
-            i_ps=icoolpump,
-            radius_pipe_90_deg_bend=radius_pipe_90_deg_bend,
-            radius_pipe_180_deg_bend=radius_pipe_180_deg_bend,
-            n_pipe_90_deg_bends=n_pipe_90_deg_bends,
-            n_pipe_180_deg_bends=n_pipe_180_deg_bends,
-            len_pipe=len_pipe,
-            den_coolant=den_coolant,
-            visc_coolant=visc_coolant_dynamic,
-            vel_coolant=vel_coolant,
-            label=label,
-            output=output,
+        friction_params: CoolantFrictionLossParameters = (
+            self.coolant_friction_pressure_drop(
+                i_ps=icoolpump,
+                radius_pipe_90_deg_bend=radius_pipe_90_deg_bend,
+                radius_pipe_180_deg_bend=radius_pipe_180_deg_bend,
+                n_pipe_90_deg_bends=n_pipe_90_deg_bends,
+                n_pipe_180_deg_bends=n_pipe_180_deg_bends,
+                len_pipe=len_pipe,
+                den_coolant=den_coolant,
+                visc_coolant=visc_coolant_dynamic,
+                vel_coolant=vel_coolant,
+            )
         )
+        dpres_friction = friction_params.dpres_total
 
         if icoolpump == 2:
             dpres_mhd = self.liquid_breeder_mhd_pressure_drop(
@@ -2979,22 +3025,7 @@ def total_pressure_drop(
         # Total pressure drop (Pa)
         dpres_total = dpres_friction + dpres_mhd
 
-        if output:
-            po.osubhd(self.outfile, f"Total pressure drop for {label}")
-
-            po.ocmmnt(self.outfile, "Friction drops plus MHD drops if applicaple")
-            po.ovarre(
-                self.outfile, "Total pressure drop (Pa)", "(deltap)", dpres_total, "OP "
-            )
-            po.ovarre(
-                self.outfile,
-                "Coolant flow velocity (m/s)",
-                "(flow_velocity, formerly vv)",
-                vel_coolant,
-                "OP ",
-            )
-
-        return dpres_total
+        return dpres_total, friction_params
 
     def liquid_breeder_mhd_pressure_drop(
         self,
@@ -3168,9 +3199,7 @@ def coolant_friction_pressure_drop(
         den_coolant: float,
         visc_coolant: float,
         vel_coolant: float,
-        label: str,
-        output: bool = False,
-    ):
+    ) -> CoolantFrictionLossParameters:
         """Pressure drops are calculated for a pipe with a number of 90
         and 180 degree bends. The pressure drop due to frictional forces along
         the total straight length of the pipe is calculated, then the pressure
@@ -3197,12 +3226,23 @@ def coolant_friction_pressure_drop(
             coolant viscosity (Pa s)
         vel_coolant :
             coolant flow velocity (m/s)
-        label :
-            component name
-        output :
-            boolean of whether to write data to output file
 
-        :Notes:
+        Returns
+        -------
+        :
+            CoolantFrictionLossParameters dataclass containing:
+            - Total pressure drop due to friction (Pa)
+            - Pressure drop due to straight sections (Pa)
+            - Pressure drop due to 90 degree bends (Pa)
+            - Pressure drop due to 180 degree bends (Pa)
+            - Reynolds number
+            - Darcy friction factor
+            - Pressure drop coefficient for straight sections
+            - Pressure drop coefficient for 90 degree bends
+            - Pressure drop coefficient for 180 degree bends
+
+        Notes
+        -----
             Darcy-Weisbach Equation (straight pipe):
 
             ΔP = λ * L/D * (p 〈v〉²) / 2
@@ -3263,78 +3303,31 @@ def coolant_friction_pressure_drop(
         dpres_straight = f_straight * 0.5 * den_coolant * vel_coolant**2
 
         # Pressure drop due to 90 and 180 degree bends
-        dpres_90 = n_pipe_90_deg_bends * f_elbow_90 * 0.5 * den_coolant * vel_coolant**2
-        dpres_180 = (
-            n_pipe_180_deg_bends * f_elbow_180 * 0.5 * den_coolant * vel_coolant**2
-        )
-
-        # Total pressure drop (Pa)
-        dpres_total = dpres_straight + dpres_90 + dpres_180
-
-        if output:
-            po.osubhd(self.outfile, f"Pressure drop (friction) for {label}")
-            po.ovarre(self.outfile, "Reynolds number", "(reyn)", reynolds_number, "OP ")
-            po.ovarre(
-                self.outfile,
-                "Darcy friction factor",
-                "(lambda)",
-                darcy_friction_factor,
-                "OP ",
-            )
-            po.ovarre(
-                self.outfile,
-                "Pressure drop (Pa)",
-                "(pressure_drop)",
-                dpres_total,
-                "OP ",
-            )
-            po.ocmmnt(self.outfile, "This is the sum of the following:")
-            po.ovarre(
-                self.outfile,
-                "            Straight sections (Pa)",
-                "(pdropstraight)",
-                dpres_straight,
-                "OP ",
-            )
-            po.ovarre(
-                self.outfile,
-                "            90 degree bends (Pa)",
-                "(pdrop90)",
-                dpres_90,
-                "OP ",
-            )
-            po.ovarre(
-                self.outfile,
-                "            180 degree bends (Pa)",
-                "(pdrop180)",
-                dpres_180,
-                "OP ",
-            )
+        dpres_90 = f_elbow_90 * 0.5 * den_coolant * vel_coolant**2
+        dpres_90_total = n_pipe_90_deg_bends * dpres_90
+        dpres_180 = f_elbow_180 * 0.5 * den_coolant * vel_coolant**2
+        dpres_180_total = n_pipe_180_deg_bends * dpres_180
 
-            # TN: always write verbose stuff, it has no harm
-            po.ovarre(
-                self.outfile,
-                "Straight section pressure drop coefficient",
-                "(kstrght)",
-                f_straight,
-                "OP ",
-            )
-            po.ovarre(
-                self.outfile,
-                "90 degree elbow coefficient",
-                "(kelbwn)",
-                f_elbow_90,
-                "OP ",
-            )
-            po.ovarre(
-                self.outfile,
-                "180 degree elbow coefficient coefficient",
-                "(kelbwt)",
-                f_elbow_180,
-                "OP ",
-            )
+        dpres_bends_total = dpres_90_total + dpres_180_total
 
-        return dpres_total
+        # Total pressure drop (Pa)
+        dpres_total = dpres_straight + dpres_bends_total
+
+        return CoolantFrictionLossParameters(
+            dpres_total=dpres_total,
+            dpres_straight=dpres_straight,
+            dpres_90=dpres_90,
+            dpres_90_total=dpres_90_total,
+            dpres_180=dpres_180,
+            dpres_180_total=dpres_180_total,
+            dpres_bends_total=dpres_bends_total,
+            reynolds_number=reynolds_number,
+            darcy_friction_factor=darcy_friction_factor,
+            f_straight=f_straight,
+            len_straight=len_pipe,
+            f_elbow_90=f_elbow_90,
+            f_elbow_180=f_elbow_180,
+        )
 
     def pipe_hydraulic_diameter(self, i_channel_shape):
         """Caculate the hydraulic diameter (m) for a given coolant pipe size/shape.
@@ -3547,6 +3540,187 @@ def coolant_pumping_power(
 
         return pumppower
 
+    def output_blkt_pumping_variables(self):
+
+        po.oheadr(self.outfile, "Blanket pumping variables")
+
+        po.osubhd(self.outfile, "Inboard Blanket")
+
+        po.ovarre(
+            self.outfile,
+            "Inboard blanket coolant channel length (radial direction) (m)",
+            "(len_blkt_inboard_coolant_channel_radial)",
+            self.data.blanket.len_blkt_inboard_coolant_channel_radial,
+            "OP ",
+        )
+        po.ovarre(
+            self.outfile,
+            "Inboard blanket coolant channel length (toroidal direction) (m)",
+            "(len_blkt_inboard_segment_toroidal)",
+            self.data.blanket.len_blkt_inboard_segment_toroidal,
+            "OP ",
+        )
+        po.ovarre(
+            self.outfile,
+            "Number of inboard blanket coolant sections in the radial direction",
+            "(n_blkt_inboard_module_coolant_sections_radial)",
+            self.data.fwbs.n_blkt_inboard_module_coolant_sections_radial,
+            "OP ",
+        )
+        po.ovarre(
+            self.outfile,
+            "Number of inboard blanket coolant sections in the poloidal direction",
+            "(n_blkt_inboard_module_coolant_sections_poloidal)",
+            self.data.fwbs.n_blkt_inboard_module_coolant_sections_poloidal,
+            "OP ",
+        )
+        po.ovarre(
+            self.outfile,
+            "Total length of inboard blanket coolant channel straight sections (m)",
+            "(len_blkt_inboard_channel_total)",
+            self.data.blanket.len_blkt_inboard_channel_total,
+            "OP ",
+        )
+
+        po.osubhd(self.outfile, "Outboard Blanket")
+
+        po.ovarre(
+            self.outfile,
+            "Outboard blanket coolant channel length (radial direction) (m)",
+            "(len_blkt_outboard_coolant_channel_radial)",
+            self.data.blanket.len_blkt_outboard_coolant_channel_radial,
+            "OP ",
+        )
+        po.ovarre(
+            self.outfile,
+            "Outboard blanket coolant channel length (toroidal direction) (m)",
+            "(len_blkt_outboard_segment_toroidal)",
+            self.data.blanket.len_blkt_outboard_segment_toroidal,
+            "OP ",
+        )
+        po.oblnkl(self.outfile)
+        po.ovarre(
+            self.outfile,
+            "Number of outboard blanket coolant sections in the radial direction",
+            "(n_blkt_outboard_module_coolant_sections_radial)",
+            self.data.fwbs.n_blkt_outboard_module_coolant_sections_radial,
+            "OP ",
+        )
+        po.ovarre(
+            self.outfile,
+            "Number of outboard blanket coolant sections in the poloidal direction",
+            "(n_blkt_outboard_module_coolant_sections_poloidal)",
+            self.data.fwbs.n_blkt_outboard_module_coolant_sections_poloidal,
+            "OP ",
+        )
+        po.oblnkl(self.outfile)
+        po.ovarre(
+            self.outfile,
+            "Total length of outboard blanket coolant channel straight sections (m)",
+            "(len_blkt_outboard_channel_total)",
+            self.data.blanket.len_blkt_outboard_channel_total,
+            "OP ",
+        )
+        po.oblnkl(self.outfile)
+        po.ocmmnt(self.outfile, "----------------------------")
+
+        po.ovarre(
+            self.outfile,
+            "Pressure drop for straight sections of outboard blanket (Pa)",
+            "(dpres_blkt_outboard_coolant_channel_straight_total)",
+            self.data.blanket.dpres_blkt_outboard_coolant_channel_straight_total,
+            "OP ",
+        )
+        po.oblnkl(self.outfile)
+        po.ovarre(
+            self.outfile,
+            "Pressure drop for 90° bends of outboard blanket (Pa)",
+            "(dpres_blkt_outboard_coolant_channel_90_bend)",
+            self.data.blanket.dpres_blkt_outboard_coolant_channel_90_bend,
+            "OP ",
+        )
+        po.ovarre(
+            self.outfile,
+            "Total pressure drop for 90° bends of outboard blanket (Pa)",
+            "(dpres_blkt_outboard_coolant_channel_90_bends_total)",
+            self.data.blanket.dpres_blkt_outboard_coolant_channel_90_bends_total,
+            "OP ",
+        )
+        po.oblnkl(self.outfile)
+        po.ovarre(
+            self.outfile,
+            "Pressure drop for 180° bends of outboard blanket (Pa)",
+            "(dpres_blkt_outboard_coolant_channel_180_bend)",
+            self.data.blanket.dpres_blkt_outboard_coolant_channel_180_bend,
+            "OP ",
+        )
+        po.ovarre(
+            self.outfile,
+            "Total pressure drop for 180° bends of outboard blanket (Pa)",
+            "(dpres_blkt_outboard_coolant_channel_180_bends_total)",
+            self.data.blanket.dpres_blkt_outboard_coolant_channel_180_bends_total,
+            "OP ",
+        )
+
+        po.oblnkl(self.outfile)
+        po.ovarre(
+            self.outfile,
+            "Total pressure drop for all bends (Pa)",
+            "(dpres_blkt_outboard_bends_total)",
+            self.data.blanket.dpres_blkt_outboard_bends_total,
+            "OP ",
+        )
+
+        po.oblnkl(self.outfile)
+        po.ovarre(
+            self.outfile,
+            "Reynolds number of outboard blanket coolant",
+            "(reynolds_blkt_outboard_coolant)",
+            self.data.blanket.reynolds_blkt_outboard_coolant,
+            "OP ",
+        )
+
+        po.ovarre(
+            self.outfile,
+            "Darcy friction factor of outboard blanket coolant",
+            "(darcy_frict_blkt_outboard_coolant)",
+            self.data.blanket.darcy_frict_blkt_outboard_coolant,
+            "OP ",
+        )
+        po.oblnkl(self.outfile)
+
+        po.ovarre(
+            self.outfile,
+            "Pressure drop coefficient for straight sections of outboard blanket",
+            "(f_straight_blkt_outboard_coolant)",
+            self.data.blanket.f_straight_blkt_outboard_coolant,
+            "OP ",
+        )
+
+        po.ovarre(
+            self.outfile,
+            "Total length of straight sections of outboard blanket coolant channels (m)",
+            "(len_blkt_outboard_coolant_channel_straight_total)",
+            self.data.blanket.len_blkt_outboard_coolant_channel_straight_total,
+            "OP ",
+        )
+
+        po.ovarre(
+            self.outfile,
+            "Pressure drop coefficient for 90° bends in outboard blanket",
+            "(f_elbow_blkt_outboard_90_bend)",
+            self.data.blanket.f_elbow_blkt_outboard_90_bend,
+            "OP ",
+        )
+
+        po.ovarre(
+            self.outfile,
+            "Pressure drop coefficient for 180° bends in outboard blanket",
+            "(f_elbow_blkt_outboard_180_bend)",
+            self.data.blanket.f_elbow_blkt_outboard_180_bend,
+            "OP ",
+        )
+
 
 class OutboardBlanket(BlanketLibrary):
     """Outboard blanket routines"""
diff --git a/process/models/engineering/pumping.py b/process/models/engineering/pumping.py
index ea8fdb5649..68fdedbe5f 100644
--- a/process/models/engineering/pumping.py
+++ b/process/models/engineering/pumping.py
@@ -3,6 +3,7 @@
 import logging
 from enum import IntEnum, unique
 from types import DynamicClassAttribute
+from dataclasses import dataclass
 
 import numpy as np
 
@@ -46,6 +47,38 @@ def full_name(self):
 logger = logging.getLogger(__name__)
 
 
+@dataclass
+class CoolantFrictionLossParameters:
+    """Parameters for calculating coolant friction losses."""
+
+    dpres_total: float
+    """Total pressure drop across the coolant channel (Pa)"""
+    dpres_straight: float
+    """Pressure drop due to straight length of the coolant channel (Pa)"""
+    dpres_90: float
+    """Pressure drop due to 90 degree bends in the coolant channel (Pa)"""
+    dpres_90_total: float
+    """Total pressure drop due to 90 degree bends in the coolant channel (Pa)"""
+    dpres_180: float
+    """Pressure drop due to 180 degree bends in the coolant channel (Pa)"""
+    dpres_180_total: float
+    """Total pressure drop due to 180 degree bends in the coolant channel (Pa)"""
+    dpres_bends_total: float
+    """Total pressure drop due to bends in the coolant channel (Pa)"""
+    reynolds_number: float
+    """Reynolds number of the coolant flow in the channel"""
+    darcy_friction_factor: float
+    """Darcy friction factor for the coolant flow in the channel"""
+    f_straight: float
+    """Friction factor for straight length of the coolant channel"""
+    len_straight: float
+    """Length of straight sections of the coolant channel (m)"""
+    f_elbow_90: float
+    """Friction factor for 90 degree bends in the coolant channel"""
+    f_elbow_180: float
+    """Friction factor for 180 degree bends in the coolant channel"""
+
+
 def darcy_friction_haaland(
     reynolds: float, roughness_channel: float, radius_channel: float
 ) -> float:
diff --git a/tests/unit/models/blankets/test_blanket_library.py b/tests/unit/models/blankets/test_blanket_library.py
index 168c165dfa..3070e24bb9 100644
--- a/tests/unit/models/blankets/test_blanket_library.py
+++ b/tests/unit/models/blankets/test_blanket_library.py
@@ -1118,7 +1118,6 @@ def test_pressure_drop(pressuredropparam, monkeypatch, blanket_library):
         den_coolant=pressuredropparam.den,
         visc_coolant=pressuredropparam.vsc,
         vel_coolant=pressuredropparam.vv,
-        label=pressuredropparam.label,
     )
 
     assert pressure_drop_out == pytest.approx(

From d23fc8852bb14cfdb6bd5ef62238c5af12927833 Mon Sep 17 00:00:00 2001
From: mn3981 <christopher.ashe@ukaea.uk>
Date: Thu, 4 Jun 2026 16:40:38 +0100
Subject: [PATCH 04/33] Add function to plot blanket coolant channel structure
 and update main plot

---
 process/core/io/plot/summary.py            | 246 ++++++++++++++++++++-
 process/models/blankets/blanket_library.py |   1 -
 process/models/blankets/hcpb.py            |  47 ++++
 3 files changed, 288 insertions(+), 6 deletions(-)

diff --git a/process/core/io/plot/summary.py b/process/core/io/plot/summary.py
index bd34580d43..e0231a202b 100644
--- a/process/core/io/plot/summary.py
+++ b/process/core/io/plot/summary.py
@@ -16332,7 +16332,241 @@ def plot_cs_von_mises_2d_contour(
     axis.set_xlim(r_cs_inner * 0.9, r_cs_outer * 1.1)
     axis.set_ylim((-dz_cs_full / 2) * 1.1, (dz_cs_full / 2) * 1.1)
     axis.grid(True, alpha=0.3)
-    axis.set_title("CS Von Mises Stress Contour at BOP")
+    axis.set_title("CS Radial Stress at BOP")
+    axis.legend(loc="best")
+
+
+def plot_blanket_coolant_channel_structure(self, m_file: MFile, scan: int):
+    """Plot a schematic of the blanket coolant channel routing."""
+    len_blkt_outboard_coolant_channel_radial = float(
+        m_file.get("len_blkt_outboard_coolant_channel_radial", scan=scan)
+    )
+    len_blkt_outboard_segment_toroidal = float(
+        m_file.get("len_blkt_outboard_segment_toroidal", scan=scan)
+    )
+    n_blkt_outboard_module_coolant_sections_radial = max(
+        1,
+        int(
+            round(
+                m_file.get("n_blkt_outboard_module_coolant_sections_radial", scan=scan)
+            )
+        ),
+    )
+    n_blkt_outboard_module_coolant_sections_poloidal = max(
+        1,
+        int(
+            round(
+                m_file.get("n_blkt_outboard_module_coolant_sections_poloidal", scan=scan)
+            )
+        ),
+    )
+    elbow_radius_180 = max(
+        float(m_file.get("radius_blkt_channel_180_bend", scan=scan)), 1e-6
+    )
+    r = max(float(m_file.get("radius_blkt_channel", scan=scan)), 1e-6)
+    elbow_radius_90 = max(
+        float(m_file.get("radius_blkt_channel_90_bend", scan=scan)), 1e-6
+    )
+
+    axis = self if isinstance(self, Axes) else getattr(self, "ax", None)
+    figure = axis.figure if isinstance(axis, Axes) else None
+
+    if not isinstance(axis, Axes):
+        figure, axis = plt.subplots(figsize=(10, 6))
+
+    def _plot_straight(
+        x0: float,
+        y0: float,
+        x1: float,
+        y1: float,
+        *,
+        label: str | None = None,
+        alpha: float = 1.0,
+    ):
+        axis.plot(
+            [x0, x1],
+            [y0, y1],
+            color="tab:blue",
+            linewidth=2.5,
+            solid_capstyle="round",
+            alpha=alpha,
+            label=label,
+        )
+
+    def _plot_bend(
+        centre_x: float,
+        centre_y: float,
+        radius: float,
+        theta_start: float,
+        theta_end: float,
+        *,
+        label: str | None = None,
+        alpha: float = 1.0,
+    ):
+        theta = np.linspace(theta_start, theta_end, 80)
+        axis.plot(
+            centre_x + radius * np.cos(theta),
+            centre_y + radius * np.sin(theta),
+            color="tab:orange",
+            linewidth=2.5,
+            solid_capstyle="round",
+            alpha=alpha,
+            label=label,
+        )
+
+    lane_pitch = 2.0 * elbow_radius_180
+    poloidal_section_length = max(4.0 * r, 1.5 * elbow_radius_90)
+
+    show_radial_label = True
+    show_poloidal_label = True
+    show_90_label = True
+
+    inlet_x = 0.0
+    x_left = elbow_radius_90
+    x_right = elbow_radius_90 + len_blkt_outboard_coolant_channel_radial
+    y_lower = 0.0
+    y_upper = y_lower + lane_pitch
+    y_inlet_lower = y_lower - elbow_radius_90 - poloidal_section_length
+    y_outlet_upper = y_upper + elbow_radius_90 + poloidal_section_length
+
+    _plot_straight(
+        inlet_x,
+        y_inlet_lower,
+        inlet_x,
+        y_lower - elbow_radius_90,
+        label="Straight poloidal section" if show_poloidal_label else None,
+    )
+    show_poloidal_label = False
+
+    _plot_bend(
+        elbow_radius_90,
+        y_lower - elbow_radius_90,
+        elbow_radius_90,
+        np.pi,
+        np.pi / 2.0,
+        label="90° bend" if show_90_label else None,
+    )
+    show_90_label = False
+
+    _plot_straight(
+        x_left,
+        y_lower,
+        x_right,
+        y_lower,
+        label="Straight radial section" if show_radial_label else None,
+    )
+    show_radial_label = False
+
+    _plot_bend(
+        x_right,
+        y_lower + elbow_radius_180,
+        elbow_radius_180,
+        -np.pi / 2.0,
+        np.pi / 2.0,
+        label="180° bend",
+    )
+
+    _plot_straight(
+        x_right,
+        y_upper,
+        x_left,
+        y_upper,
+        label="Straight radial section" if show_radial_label else None,
+    )
+
+    _plot_bend(
+        x_left,
+        y_upper + elbow_radius_90,
+        elbow_radius_90,
+        3.0 * np.pi / 2.0,
+        np.pi,
+        label="90° bend" if show_90_label else None,
+    )
+
+    _plot_straight(
+        inlet_x,
+        y_upper + elbow_radius_90,
+        inlet_x,
+        y_outlet_upper,
+        label="Straight poloidal section" if show_poloidal_label else None,
+    )
+
+    total_180_bends = 1
+    total_90_bends = 2
+    total_poloidal_sections = 2
+    length_per_90_bend = 0.5 * np.pi * elbow_radius_90
+    length_per_180_bend = np.pi * elbow_radius_180
+    length_per_poloidal_section = poloidal_section_length
+    total_radial_channel_length = (
+        n_blkt_outboard_module_coolant_sections_radial
+        * len_blkt_outboard_coolant_channel_radial
+    )
+    total_poloidal_length = total_poloidal_sections * length_per_poloidal_section
+    total_bend_length = (
+        total_90_bends * length_per_90_bend + total_180_bends * length_per_180_bend
+    )
+    total_channel_length = (
+        total_radial_channel_length + total_poloidal_length + total_bend_length
+    )
+    info = textwrap.dedent(
+        f"""
+        Representative continuous channel loop
+        Straight radial sections: {n_blkt_outboard_module_coolant_sections_radial}
+        Straight radial length per channel: {total_radial_channel_length:.2f} m
+        Straight poloidal sections per loop: {total_poloidal_sections}
+        Straight poloidal length: {length_per_poloidal_section:.2f} m each
+        90° bends per channel: {total_90_bends}
+        90° bend length: {length_per_90_bend:.2f} m each
+        180° bends per channel: {total_180_bends}
+        180° bend length: {length_per_180_bend:.2f} m each
+        Total poloidal length per channel: {total_poloidal_length:.2f} m
+        Total bend length per channel: {total_bend_length:.2f} m
+        Approx. total channel length: {total_channel_length:.2f} m
+        Poloidal sections per module: {n_blkt_outboard_module_coolant_sections_poloidal}
+        Toroidal span per segment: {len_blkt_outboard_segment_toroidal:.2f} m
+        Channel radius: {r:.3f} m
+        """
+    ).strip()
+
+    axis.text(
+        1.02,
+        0.98,
+        info,
+        transform=axis.transAxes,
+        va="top",
+        ha="left",
+        fontsize=8,
+        bbox={"boxstyle": "round", "facecolor": "white", "alpha": 0.9},
+    )
+
+    axis.text(
+        0.02,
+        0.02,
+        "Continuous loop schematic with a single 180° return bend",
+        transform=axis.transAxes,
+        fontsize=8,
+        color="dimgray",
+    )
+
+    axis.set_title("Blanket coolant channel structure")
+    axis.set_xlabel("Radial direction [m]")
+    axis.set_ylabel("Channel layout [schematic m]")
+    axis.set_aspect("equal", adjustable="box")
+    axis.grid(True, alpha=0.25)
+    axis.minorticks_on()
+    axis.legend(fontsize=8, loc="upper right")
+
+    x_margin = len_blkt_outboard_coolant_channel_radial * 0.1 + 2.0 * elbow_radius_90
+    axis.set_xlim(-x_margin, x_right + x_margin)
+    axis.set_ylim(
+        y_inlet_lower - r,
+        y_outlet_upper + r,
+    )
+
+    if figure is not None:
+        figure.tight_layout()
+
+    return axis
 
 
 def plot_pf_dimensions(
@@ -17114,10 +17348,10 @@ def _add_page(name: str | None = None):
     ax24 = _add_page("power_profile_over_time").add_subplot(111)
     # set_position([left, bottom, width, height]) -> height ~ 0.66 => ~2/3 of page height
     ax24.set_position([0.08, 0.35, 0.84, 0.57])
-    plot_system_power_profiles_over_time(
-        ax24, m_file, scan, pages["power_profile_over_time"]
-    )
-    return list(pages.values())
+    plot_system_power_profiles_over_time(ax24, m_file, scan, figs[36])
+
+    plot_blanket_coolant_channel_structure(figs[37].add_subplot(111), m_file, scan)
+
 
 
 def create_thickness_builds(m_file, scan: int):
@@ -17224,6 +17458,8 @@ def add_page_footer(
 
     # create main plot
     # Increase range when adding new page
+    pages = [plt.figure(figsize=(12, 9), dpi=80) for i in range(38)]
+
     # run main_plot
     mfile_obj = MFile(mfile) if mfile else MFile("MFILE.DAT")
     run_label = f"{mfile_obj.get('fileprefix', scan=-1)} | scan {scan or -1} | {mfile_obj.get('date', scan=-1)} {mfile_obj.get('time', scan=-1)} | {mfile_obj.get('tagno', scan=-1)} | Branch: {mfile_obj.get('branch_name', scan=-1)}  "
diff --git a/process/models/blankets/blanket_library.py b/process/models/blankets/blanket_library.py
index d85aebb356..d62e3e542f 100644
--- a/process/models/blankets/blanket_library.py
+++ b/process/models/blankets/blanket_library.py
@@ -2518,7 +2518,6 @@ def thermo_hydraulic_model(self, output: bool):
             deltap = self.thermo_hydraulic_model_pressure_drop_calculations(
                 output=output
             )
-            print(deltap)
             deltap_fwi = deltap[0]
             deltap_fwo = deltap[1]
             deltap_blo = deltap[2]
diff --git a/process/models/blankets/hcpb.py b/process/models/blankets/hcpb.py
index df70b18641..f0bea066f2 100644
--- a/process/models/blankets/hcpb.py
+++ b/process/models/blankets/hcpb.py
@@ -860,6 +860,53 @@ def powerflow_calc(self, output: bool):
                     + self.data.fwbs.p_div_rad_total_mw
                 )
             )
+            if output:
+                po.ovarre(
+                    self.outfile,
+                    "Mechanical pumping power for FW and blanket cooling loop including heat exchanger (MW)",
+                    "(p_fw_blkt_coolant_pump_mw)",
+                    self.data.primary_pumping.p_fw_blkt_coolant_pump_mw,
+                    "OP ",
+                )
+                po.ovarre(
+                    self.outfile,
+                    "Pumping power for FW and Blanket multiplier factor",
+                    "(f_p_fw_blkt_pump)",
+                    self.data.primary_pumping.f_p_fw_blkt_pump,
+                    "IP ",
+                )
+                po.ovarre(
+                    self.outfile,
+                    "Mechanical pumping power for divertor (MW)",
+                    "(p_div_coolant_pump_mw)",
+                    self.data.heat_transport.p_div_coolant_pump_mw,
+                    "OP ",
+                )
+                po.ovarre(
+                    self.outfile,
+                    "Mechanical pumping power for shield and vacuum vessel (MW)",
+                    "(p_shld_coolant_pump_mw)",
+                    self.data.heat_transport.p_shld_coolant_pump_mw,
+                    "OP ",
+                )
+                po.ovarre(
+                    self.outfile,
+                    "Radius of blanket cooling channels (m)",
+                    "(radius_blkt_channel)",
+                    self.data.fwbs.radius_blkt_channel,
+                )
+                po.ovarre(
+                    self.outfile,
+                    "Radius of 90 degree coolant channel bend (m)",
+                    "(radius_blkt_channel_90_bend)",
+                    self.data.fwbs.radius_blkt_channel_90_bend,
+                )
+                po.ovarre(
+                    self.outfile,
+                    "Radius of 180 degree coolant channel bend (m)",
+                    "(radius_blkt_channel_180_bend)",
+                    self.data.fwbs.radius_blkt_channel_180_bend,
+                )
 
         elif i_p_coolant_pumping == PumpingPowerModelTypes.MECHANICAL_WITH_PRESSURE_DROP:
             # Issue #503

From 992e8b2bf4be5a0439f9e2f5b97c6d16fee574b3 Mon Sep 17 00:00:00 2001
From: mn3981 <christopher.ashe@ukaea.uk>
Date: Fri, 5 Jun 2026 10:58:10 +0100
Subject: [PATCH 05/33] Refactor pressure drop assertions in blanket tests for
 clarity and consistency

---
 .../unit/models/blankets/test_blanket_library.py | 16 ++++++----------
 1 file changed, 6 insertions(+), 10 deletions(-)

diff --git a/tests/unit/models/blankets/test_blanket_library.py b/tests/unit/models/blankets/test_blanket_library.py
index 3070e24bb9..cb1bf19180 100644
--- a/tests/unit/models/blankets/test_blanket_library.py
+++ b/tests/unit/models/blankets/test_blanket_library.py
@@ -301,10 +301,8 @@ def test_deltap_tot_inboard_first_wall(monkeypatch, blanket_library):
         "label": "Inboard first wall",
     }
 
-    assert (
-        pytest.approx(blanket_library.total_pressure_drop(False, **data))
-        == 5884.982168510442
-    )
+    dpres_total, _ = blanket_library.total_pressure_drop(False, **data)
+    assert dpres_total == pytest.approx(5884.982168510442)
 
 
 def test_deltap_tot_outboard_blanket_breeder_liquid(monkeypatch, blanket_library):
@@ -332,10 +330,8 @@ def test_deltap_tot_outboard_blanket_breeder_liquid(monkeypatch, blanket_library
         "label": "Outboard blanket breeder liquid",
     }
 
-    assert (
-        pytest.approx(blanket_library.total_pressure_drop(False, **data))
-        == 56.95922064419226
-    )
+    dpres_total, _ = blanket_library.total_pressure_drop(False, **data)
+    assert dpres_total == pytest.approx(56.95922064419226)
 
 
 def test_pumppower_primary_helium(monkeypatch, blanket_library):
@@ -1108,7 +1104,7 @@ def test_pressure_drop(pressuredropparam, monkeypatch, blanket_library):
         pressuredropparam.roughness_fw_channel,
     )
 
-    pressure_drop_out = blanket_library.coolant_friction_pressure_drop(
+    pressure_params = blanket_library.coolant_friction_pressure_drop(
         i_ps=pressuredropparam.i_ps,
         radius_pipe_90_deg_bend=pressuredropparam.radius_pipe_90_deg_bend,
         radius_pipe_180_deg_bend=pressuredropparam.radius_pipe_180_deg_bend,
@@ -1120,7 +1116,7 @@ def test_pressure_drop(pressuredropparam, monkeypatch, blanket_library):
         vel_coolant=pressuredropparam.vv,
     )
 
-    assert pressure_drop_out == pytest.approx(
+    assert pressure_params.dpres_total == pytest.approx(
         pressuredropparam.expected_pressure_drop_out
     )
 

From 8d84409a529715990e7f5b79b37608d6c99899d8 Mon Sep 17 00:00:00 2001
From: mn3981 <christopher.ashe@ukaea.uk>
Date: Fri, 5 Jun 2026 14:30:55 +0100
Subject: [PATCH 06/33] Add function to plot outboard blanket coolant
 properties along the poloidal direction

---
 process/core/io/plot/summary.py | 100 ++++++++++++++++++++++++++++++++
 1 file changed, 100 insertions(+)

diff --git a/process/core/io/plot/summary.py b/process/core/io/plot/summary.py
index e0231a202b..be0cfad3c8 100644
--- a/process/core/io/plot/summary.py
+++ b/process/core/io/plot/summary.py
@@ -7,11 +7,14 @@
 from pathlib import Path
 from typing import Any, Literal
 
+import CoolProp
 import matplotlib as mpl
 import matplotlib.backends.backend_pdf as bpdf
 import matplotlib.image as mpimg
 import matplotlib.pyplot as plt
 import numpy as np
+from CoolProp.CoolProp import PropsSI
+from CoolProp.Plots import PropertyPlot
 from matplotlib import patches
 from matplotlib.patches import Circle, Rectangle
 from matplotlib.path import Path as mplPath
@@ -16708,6 +16711,102 @@ def plot_pf_dimensions(
     axis.set_aspect("equal", adjustable="box")
 
 
+def plot_outboard_blanket_coolant_properties(fig: plt.Figure, m_file: MFile, scan: int):
+    """Plots the properties of the outboard blanket coolant along the poloidal direction."""
+    temp_blkt_coolant_in = float(m_file.get("temp_blkt_coolant_in", scan=scan))
+    temp_blkt_coolant_out = float(m_file.get("temp_blkt_coolant_out", scan=scan))
+    pres_blkt_coolant = float(m_file.get("pres_blkt_coolant", scan=scan))
+    dens_blkt_coolant_in = PropsSI(
+        "Dmass", "T", temp_blkt_coolant_in, "P", pres_blkt_coolant, "Helium"
+    )
+    dens_blkt_coolant_out = PropsSI(
+        "Dmass", "T", temp_blkt_coolant_out, "P", pres_blkt_coolant, "Helium"
+    )
+
+    fig.clear()
+    axes = fig.subplots(2, 2)
+
+    axis = axes[0, 0]
+
+    plot = PropertyPlot("Helium", "PH", axis=axis, unit_system="SI")
+
+    # #axis.set_xscale('log')
+    axis.set_ylim(((pres_blkt_coolant) * 0.9), (pres_blkt_coolant) * 1.5)
+    # plot.set_axis_limits([None, None, (pres_blkt_coolant/1e3)*0.9, (pres_blkt_coolant/1e3)*1.1])
+
+    plot.calc_isolines(CoolProp.iT)  # Temperature
+    plot.calc_isolines(CoolProp.iSmass)  # Entropy
+    plot.calc_isolines(CoolProp.iDmass)  # Density
+    # plot.axis.relim()
+    # plot.axis.autoscale_view()
+    plot.draw()
+
+    axis.set_title("Pressure-enthalpy plot")
+
+    axis = axes[0, 1]
+    plot = PropertyPlot("Helium", "TD", axis=axis, unit_system="SI")
+
+    density_min = min(dens_blkt_coolant_in, dens_blkt_coolant_out)
+    density_max = max(dens_blkt_coolant_in, dens_blkt_coolant_out)
+    temperature_min = min(temp_blkt_coolant_in, temp_blkt_coolant_out)
+    temperature_max = max(temp_blkt_coolant_in, temp_blkt_coolant_out)
+
+    density_margin = max((density_max - density_min) * 0.2, max(density_max, 1.0) * 0.05)
+    temperature_margin = max(
+        (temperature_max - temperature_min) * 0.2,
+        max(temperature_max, 1.0) * 0.05,
+    )
+
+    axis.set_xlim(density_min - density_margin, density_max + density_margin)
+    axis.set_ylim(
+        temperature_min - temperature_margin, temperature_max + temperature_margin
+    )
+
+    plot.calc_isolines(CoolProp.iP)  # Pressure
+    plot.calc_isolines(CoolProp.iHmass)  # Enthalpy
+    plot.draw()
+
+    axis.plot(
+        [dens_blkt_coolant_in, dens_blkt_coolant_out],
+        [temp_blkt_coolant_in, temp_blkt_coolant_out],
+        color="C3",
+        marker="o",
+        linewidth=1.5,
+        label="Coolant path",
+    )
+    axis.legend(fontsize=8, loc="best")
+    axis.set_title("Temperature-density plot")
+
+    axis = axes[1, 0]
+    plot = PropertyPlot("Helium", "PD", axis=axis, unit_system="SI")
+
+    pressure_margin = max(pres_blkt_coolant * 0.1, 1.0)
+
+    axis.set_xlim(density_min - density_margin, density_max + density_margin)
+    axis.set_ylim(
+        pres_blkt_coolant - pressure_margin, pres_blkt_coolant + pressure_margin
+    )
+
+    plot.calc_isolines(CoolProp.iT)  # Temperature
+    plot.calc_isolines(CoolProp.iHmass)  # Enthalpy
+    plot.draw()
+
+    axis.plot(
+        [dens_blkt_coolant_in, dens_blkt_coolant_out],
+        [pres_blkt_coolant, pres_blkt_coolant],
+        color="C3",
+        marker="o",
+        linewidth=1.5,
+        label="Coolant path",
+    )
+    axis.legend(fontsize=8, loc="best")
+    axis.set_title("Pressure-density plot")
+
+    axes[1, 1].axis("off")
+
+    fig.tight_layout()
+
+
 def main_plot(
     m_file: MFile,
     scan: int,
@@ -17352,6 +17451,7 @@ def _add_page(name: str | None = None):
 
     plot_blanket_coolant_channel_structure(figs[37].add_subplot(111), m_file, scan)
 
+    plot_outboard_blanket_coolant_properties(figs[37], m_file, scan)
 
 
 def create_thickness_builds(m_file, scan: int):

From 8ab606f6415d0db00ace1f774f2419d5fa167423 Mon Sep 17 00:00:00 2001
From: mn3981 <christopher.ashe@ukaea.uk>
Date: Fri, 5 Jun 2026 17:17:45 +0100
Subject: [PATCH 07/33] Tidy some variable names to match style guide

---
 process/models/blankets/blanket_library.py | 85 +++++++++++++---------
 1 file changed, 52 insertions(+), 33 deletions(-)

diff --git a/process/models/blankets/blanket_library.py b/process/models/blankets/blanket_library.py
index d62e3e542f..b7149cf0e9 100644
--- a/process/models/blankets/blanket_library.py
+++ b/process/models/blankets/blanket_library.py
@@ -2322,26 +2322,26 @@ def thermo_hydraulic_model(self, output: bool):
                 self.data.build.i_blkt_inboard
                 == InboardBlanketConfiguration.INBOARD_BLANKET_PRESENT
             ):
-                fwoutleti = (f_nuc_fwi * self.data.fwbs.temp_blkt_coolant_out) + (
-                    1 - f_nuc_fwi
-                ) * self.data.fwbs.temp_fw_coolant_in
-                inlet_tempi = fwoutleti
+                temp_fw_coolant_out = (
+                    f_nuc_fwi * self.data.fwbs.temp_blkt_coolant_out
+                ) + (1 - f_nuc_fwi) * self.data.fwbs.temp_fw_coolant_in
+                temp_blkt_coolant_in = temp_fw_coolant_out
             else:
-                fwoutleti = self.data.fwbs.temp_fw_coolant_out
+                temp_fw_coolant_out = self.data.fwbs.temp_fw_coolant_out
 
-            fwoutleto = (f_nuc_fwo * self.data.fwbs.temp_blkt_coolant_out) + (
+            temp_fw_coolant_out = (f_nuc_fwo * self.data.fwbs.temp_blkt_coolant_out) + (
                 1 - f_nuc_fwo
             ) * self.data.fwbs.temp_fw_coolant_in
-            inlet_tempo = fwoutleto
+            temp_blkt_coolant_in = temp_fw_coolant_out
 
         elif (
             self.data.fwbs.i_fw_blkt_shared_coolant
             == FWBlktCoolantLoopTypes.SEPARATE_LOOPS
         ):
-            fwoutleti = self.data.fwbs.temp_fw_coolant_out
-            inlet_tempi = self.data.fwbs.temp_blkt_coolant_in
-            fwoutleto = self.data.fwbs.temp_fw_coolant_out
-            inlet_tempo = self.data.fwbs.temp_blkt_coolant_in
+            temp_fw_coolant_out = self.data.fwbs.temp_fw_coolant_out
+            temp_blkt_coolant_in = self.data.fwbs.temp_blkt_coolant_in
+            temp_fw_coolant_out = self.data.fwbs.temp_fw_coolant_out
+            temp_blkt_coolant_in = self.data.fwbs.temp_blkt_coolant_in
 
         # Maximum FW temperature. (27/11/2015) Issue #348
         # First wall flow is just along the first wall, with no allowance for radial
@@ -2386,13 +2386,19 @@ def thermo_hydraulic_model(self, output: bool):
         self.data.blanket.mflow_fw_inboard_coolant_total = (
             1.0e6
             * (self.data.blanket.p_fw_inboard_nuclear_heat_mw + self.data.fwbs.psurffwi)
-            / (self.data.fwbs.cp_fw * (fwoutleti - self.data.fwbs.temp_fw_coolant_in))
+            / (
+                self.data.fwbs.cp_fw
+                * (temp_fw_coolant_out - self.data.fwbs.temp_fw_coolant_in)
+            )
         )
         # Total mass flow rate to remove outboard FW power (kg/s)
         self.data.blanket.mflow_fw_outboard_coolant_total = (
             1.0e6
             * (self.data.blanket.p_fw_outboard_nuclear_heat_mw + self.data.fwbs.psurffwo)
-            / (self.data.fwbs.cp_fw * (fwoutleto - self.data.fwbs.temp_fw_coolant_in))
+            / (
+                self.data.fwbs.cp_fw
+                * (temp_fw_coolant_out - self.data.fwbs.temp_fw_coolant_in)
+            )
         )
 
         # If the blanket is dual-coolant...
@@ -2403,7 +2409,7 @@ def thermo_hydraulic_model(self, output: bool):
                 * (pnucblkto_struct)
                 / (
                     self.data.fwbs.cp_bl
-                    * (self.data.fwbs.temp_blkt_coolant_out - inlet_tempo)
+                    * (self.data.fwbs.temp_blkt_coolant_out - temp_blkt_coolant_in)
                 )
             )
             self.data.blanket.mfblkto_liq = (
@@ -2426,7 +2432,7 @@ def thermo_hydraulic_model(self, output: bool):
                     * (pnucblkti_struct)
                     / (
                         self.data.fwbs.cp_bl
-                        * (self.data.fwbs.temp_blkt_coolant_out - inlet_tempi)
+                        * (self.data.fwbs.temp_blkt_coolant_out - temp_blkt_coolant_in)
                     )
                 )
                 self.data.blanket.mfblkti_liq = (
@@ -2449,7 +2455,7 @@ def thermo_hydraulic_model(self, output: bool):
                 * (self.data.blanket.p_blkt_nuclear_heat_outboard_mw)
                 / (
                     self.data.fwbs.cp_bl
-                    * (self.data.fwbs.temp_blkt_coolant_out - inlet_tempo)
+                    * (self.data.fwbs.temp_blkt_coolant_out - temp_blkt_coolant_in)
                 )
             )
 
@@ -2473,7 +2479,7 @@ def thermo_hydraulic_model(self, output: bool):
                     * (self.data.blanket.p_blkt_nuclear_heat_inboard_mw)
                     / (
                         self.data.fwbs.cp_bl
-                        * (self.data.fwbs.temp_blkt_coolant_out - inlet_tempi)
+                        * (self.data.fwbs.temp_blkt_coolant_out - temp_blkt_coolant_in)
                     )
                 )
                 # Mass flow rate for inboard breeder flow (kg/s)
@@ -2489,7 +2495,7 @@ def thermo_hydraulic_model(self, output: bool):
                 * (self.data.blanket.p_blkt_nuclear_heat_outboard_mw)
                 / (
                     self.data.fwbs.cp_bl
-                    * (self.data.fwbs.temp_blkt_coolant_out - inlet_tempo)
+                    * (self.data.fwbs.temp_blkt_coolant_out - temp_blkt_coolant_in)
                 )
             )
 
@@ -2504,7 +2510,7 @@ def thermo_hydraulic_model(self, output: bool):
                     * (self.data.blanket.p_blkt_nuclear_heat_inboard_mw)
                     / (
                         self.data.fwbs.cp_bl
-                        * (self.data.fwbs.temp_blkt_coolant_out - inlet_tempi)
+                        * (self.data.fwbs.temp_blkt_coolant_out - temp_blkt_coolant_in)
                     )
                 )
 
@@ -2518,15 +2524,15 @@ def thermo_hydraulic_model(self, output: bool):
             deltap = self.thermo_hydraulic_model_pressure_drop_calculations(
                 output=output
             )
-            deltap_fwi = deltap[0]
-            deltap_fwo = deltap[1]
-            deltap_blo = deltap[2]
+            dpres_fw_inboard_coolant = deltap[0]
+            dpres_fw_outboard_coolant = deltap[1]
+            dpres_blkt_outboard_coolant = deltap[2]
             if self.data.fwbs.i_blkt_dual_coolant > 0:
                 if (
                     self.data.build.i_blkt_inboard
                     == InboardBlanketConfiguration.INBOARD_BLANKET_PRESENT
                 ):
-                    deltap_bli = deltap[3]
+                    dpres_blkt_inboard_coolant = deltap[3]
                     deltap_blo_liq = deltap[4]
                     deltap_bli_liq = deltap[5]
                 else:
@@ -2535,7 +2541,7 @@ def thermo_hydraulic_model(self, output: bool):
                 self.data.build.i_blkt_inboard
                 == InboardBlanketConfiguration.INBOARD_BLANKET_PRESENT
             ):
-                deltap_bli = deltap[3]
+                dpres_blkt_inboard_coolant = deltap[3]
 
         # Pumping Power
         # If FW and BB have the same coolant...
@@ -2546,12 +2552,21 @@ def thermo_hydraulic_model(self, output: bool):
                     self.data.build.i_blkt_inboard
                     == InboardBlanketConfiguration.INBOARD_BLANKET_PRESENT
                 ):
-                    deltap_fw_blkt = deltap_fwi + deltap_bli + deltap_fwo + deltap_blo
+                    deltap_fw_blkt = (
+                        dpres_fw_inboard_coolant
+                        + dpres_blkt_inboard_coolant
+                        + dpres_fw_outboard_coolant
+                        + dpres_blkt_outboard_coolant
+                    )
                 if (
                     self.data.build.i_blkt_inboard
                     == InboardBlanketConfiguration.NO_INBOARD_BLANKET
                 ):
-                    deltap_fw_blkt = deltap_fwi + deltap_fwo + deltap_blo
+                    deltap_fw_blkt = (
+                        dpres_fw_inboard_coolant
+                        + dpres_fw_outboard_coolant
+                        + dpres_blkt_outboard_coolant
+                    )
             elif (
                 i_p_coolant_pumping
                 == PumpingPowerModelTypes.MECHANICAL_WITH_PRESSURE_DROP
@@ -2586,25 +2601,29 @@ def thermo_hydraulic_model(self, output: bool):
         ):
             if i_p_coolant_pumping == PumpingPowerModelTypes.MECHANICAL:
                 # Total pressure drop in the first wall (Pa)
-                deltap_fw = deltap_fwi + deltap_fwo
+                dpres_fw_coolant_total = (
+                    dpres_fw_inboard_coolant + dpres_fw_outboard_coolant
+                )
 
                 # Total pressure drop in the blanket (Pa)
                 if (
                     self.data.build.i_blkt_inboard
                     == InboardBlanketConfiguration.INBOARD_BLANKET_PRESENT
                 ):
-                    deltap_blkt = deltap_bli + deltap_blo
+                    dpres_blkt_coolant_total = (
+                        dpres_blkt_inboard_coolant + dpres_blkt_outboard_coolant
+                    )
                 if (
                     self.data.build.i_blkt_inboard
                     == InboardBlanketConfiguration.NO_INBOARD_BLANKET
                 ):
-                    deltap_blkt = deltap_blo
+                    dpres_blkt_coolant_total = dpres_blkt_outboard_coolant
             elif (
                 i_p_coolant_pumping
                 == PumpingPowerModelTypes.MECHANICAL_WITH_PRESSURE_DROP
             ):
-                deltap_fw = self.data.primary_pumping.dp_fw
-                deltap_blkt = self.data.primary_pumping.dp_blkt
+                dpres_fw_coolant_total = self.data.primary_pumping.dp_fw
+                dpres_blkt_coolant_total = self.data.primary_pumping.dp_blkt
 
             # Total coolant mass flow rate in the first wall (kg/s)
             self.data.blanket.mflow_fw_coolant_total = (
@@ -2624,7 +2643,7 @@ def thermo_hydraulic_model(self, output: bool):
                 temp_coolant_pump_outlet=self.data.fwbs.temp_fw_coolant_in,
                 temp_coolant_pump_inlet=self.data.fwbs.temp_fw_coolant_out,
                 pres_coolant_pump_inlet=self.data.fwbs.pres_fw_coolant,
-                dpres_coolant=deltap_fw,
+                dpres_coolant=dpres_fw_coolant_total,
                 mflow_coolant_total=self.data.blanket.mflow_fw_coolant_total,
                 i_coolant_type=self.data.fwbs.i_fw_coolant_type,
                 den_coolant=self.data.fwbs.den_fw_coolant,
@@ -2638,7 +2657,7 @@ def thermo_hydraulic_model(self, output: bool):
                 temp_coolant_pump_outlet=self.data.fwbs.temp_blkt_coolant_in,
                 temp_coolant_pump_inlet=self.data.fwbs.temp_blkt_coolant_out,
                 pres_coolant_pump_inlet=self.data.fwbs.pres_blkt_coolant,
-                dpres_coolant=deltap_blkt,
+                dpres_coolant=dpres_blkt_coolant_total,
                 mflow_coolant_total=self.data.blanket.mflow_blkt_coolant_total,
                 i_coolant_type=(self.data.fwbs.i_blkt_coolant_type),
                 den_coolant=self.data.fwbs.den_blkt_coolant,

From 7b10286219ff1831080db4b4c1cccc31f303a98d Mon Sep 17 00:00:00 2001
From: mn3981 <christopher.ashe@ukaea.uk>
Date: Fri, 5 Jun 2026 18:04:26 +0100
Subject: [PATCH 08/33] Create mass flow required function and implement

---
 .../eng-models/generic_methods/pumping.md     |  30 ++++-
 process/models/blankets/blanket_library.py    | 124 ++++++++++--------
 process/models/engineering/pumping.py         |  34 +++++
 tests/unit/models/engineering/test_pumping.py |  29 ++++
 4 files changed, 159 insertions(+), 58 deletions(-)

diff --git a/documentation/source/eng-models/generic_methods/pumping.md b/documentation/source/eng-models/generic_methods/pumping.md
index 7bd3a1dc4e..7047b42199 100644
--- a/documentation/source/eng-models/generic_methods/pumping.md
+++ b/documentation/source/eng-models/generic_methods/pumping.md
@@ -87,4 +87,32 @@ The elbow coefficient is given by:
 
 $$
 ab + \left( f_{\text{D}} \times \frac{R_{\text{elbow}}}{D_{\text{pipe}}}\right) \times \theta \times \left(\frac{\pi}{180^{\circ}}\right)
-$$
\ No newline at end of file
+$$
+
+--------------
+
+## Required mass flow rate | `calculate_required_mass_flow_rate()`
+
+The required mass flow rate of a coolant is given simply by the fundamental heat transfer equation:
+
+$$
+\dot{m} = \frac{P}{c_{\text{p}}(T)\times \Delta T}
+$$
+
+where $\dot{m}$ is the required mass flow rate in, $P$ is the heating power to be removed, $c_{\text{p}}$ is the coolant specific heat capacity for constant pressure and $\Delta T$ is the temperature change in the coolant.
+
+!!! note "Variation specific heat capacity"
+
+    The heat capacity itself is a function of temperature. Therefore it is common to use the heat capacity value at the simple average between the initial and final temperature.
+    This however assumes a linear relationship. Ideally the equation should be solves as:
+
+    $$
+    \dot{m} = \frac{P}{\int_{T_{\text{in}}}^{T_{\text{in}}}c_{\text{p}}(T) dT}
+    $$
+
+
+!!! info "Choice of specific heat capacity"
+
+    For pumping, the specific heat capacity for constant pressure $(c_{\text{p}})$ is used as cooling loops are open-flow systems where the fluid moves continuously through pipes, heat exchangers, and pumps. As the coolant heats up, it expands freely along the loop. Because it is free to expand, the local pressure remains relatively constant while the volume changes.
+
+    You would only use the specific heat capacity for constant volume $(c_{\text{v}})$ if the coolant was completely sealed inside a rigid, unyielding container with zero flow, where heating it would cause the pressure to spike but the volume to stay exactly the same.
\ No newline at end of file
diff --git a/process/models/blankets/blanket_library.py b/process/models/blankets/blanket_library.py
index b7149cf0e9..c3bdc2fc2c 100644
--- a/process/models/blankets/blanket_library.py
+++ b/process/models/blankets/blanket_library.py
@@ -23,6 +23,7 @@
 from process.models.engineering.pumping import (
     CoolantType,
     CoolantFrictionLossParameters,
+    calculate_required_mass_flow_rate,
     calculate_reynolds_number,
     darcy_friction_haaland,
     elbow_coeff,
@@ -2384,20 +2385,29 @@ def thermo_hydraulic_model(self, output: bool):
 
         # Total mass flow rate to remove inboard FW power (kg/s)
         self.data.blanket.mflow_fw_inboard_coolant_total = (
-            1.0e6
-            * (self.data.blanket.p_fw_inboard_nuclear_heat_mw + self.data.fwbs.psurffwi)
-            / (
-                self.data.fwbs.cp_fw
-                * (temp_fw_coolant_out - self.data.fwbs.temp_fw_coolant_in)
+            calculate_required_mass_flow_rate(
+                p_heat_total=1.0e6
+                * (
+                    self.data.blanket.p_fw_inboard_nuclear_heat_mw
+                    + self.data.fwbs.psurffwi
+                ),
+                heatcap_coolant=self.data.fwbs.cp_fw,
+                temp_in_coolant=temp_fw_coolant_out,
+                temp_out_coolant=self.data.fwbs.temp_fw_coolant_in,
             )
         )
+
         # Total mass flow rate to remove outboard FW power (kg/s)
         self.data.blanket.mflow_fw_outboard_coolant_total = (
-            1.0e6
-            * (self.data.blanket.p_fw_outboard_nuclear_heat_mw + self.data.fwbs.psurffwo)
-            / (
-                self.data.fwbs.cp_fw
-                * (temp_fw_coolant_out - self.data.fwbs.temp_fw_coolant_in)
+            calculate_required_mass_flow_rate(
+                p_heat_total=1.0e6
+                * (
+                    self.data.blanket.p_fw_outboard_nuclear_heat_mw
+                    + self.data.fwbs.psurffwo
+                ),
+                heatcap_coolant=self.data.fwbs.cp_fw,
+                temp_in_coolant=temp_fw_coolant_out,
+                temp_out_coolant=self.data.fwbs.temp_fw_coolant_in,
             )
         )
 
@@ -2405,20 +2415,19 @@ def thermo_hydraulic_model(self, output: bool):
         if self.data.fwbs.i_blkt_dual_coolant == 2:
             # Mass flow rates for outboard blanket coolants (kg/s)
             self.data.blanket.mflow_blkt_outboard_coolant = (
-                1.0e6
-                * (pnucblkto_struct)
-                / (
-                    self.data.fwbs.cp_bl
-                    * (self.data.fwbs.temp_blkt_coolant_out - temp_blkt_coolant_in)
+                calculate_required_mass_flow_rate(
+                    p_heat_total=1.0e6 * pnucblkto_struct,
+                    heatcap_coolant=self.data.fwbs.cp_bl,
+                    temp_in_coolant=temp_blkt_coolant_in,
+                    temp_out_coolant=self.data.fwbs.temp_blkt_coolant_out,
                 )
             )
-            self.data.blanket.mfblkto_liq = (
-                1.0e6
-                * (pnucblkto_liq)
-                / (
-                    self.data.fwbs.specific_heat_liq
-                    * (self.data.fwbs.outlet_temp_liq - self.data.fwbs.inlet_temp_liq)
-                )
+
+            self.data.blanket.mfblkto_liq = calculate_required_mass_flow_rate(
+                p_heat_total=1.0e6 * pnucblkto_liq,
+                heatcap_coolant=self.data.fwbs.specific_heat_liq,
+                temp_in_coolant=self.data.fwbs.inlet_temp_liq,
+                temp_out_coolant=self.data.fwbs.outlet_temp_liq,
             )
 
             # If there is an IB blanket...
@@ -2428,34 +2437,31 @@ def thermo_hydraulic_model(self, output: bool):
             ):
                 # Mass flow rates for inboard blanket coolants (kg/s)
                 self.data.blanket.mflow_blkt_inboard_coolant = (
-                    1.0e6
-                    * (pnucblkti_struct)
-                    / (
-                        self.data.fwbs.cp_bl
-                        * (self.data.fwbs.temp_blkt_coolant_out - temp_blkt_coolant_in)
+                    calculate_required_mass_flow_rate(
+                        p_heat_total=1.0e6 * pnucblkti_struct,
+                        heatcap_coolant=self.data.fwbs.cp_bl,
+                        temp_in_coolant=temp_blkt_coolant_in,
+                        temp_out_coolant=self.data.fwbs.temp_blkt_coolant_out,
                     )
                 )
-                self.data.blanket.mfblkti_liq = (
-                    1.0e6
-                    * (pnucblkti_liq)
-                    / (
-                        self.data.fwbs.specific_heat_liq
-                        * (
-                            self.data.fwbs.outlet_temp_liq
-                            - self.data.fwbs.inlet_temp_liq
-                        )
-                    )
+
+                self.data.blanket.mfblkti_liq = calculate_required_mass_flow_rate(
+                    p_heat_total=1.0e6 * pnucblkti_liq,
+                    heatcap_coolant=self.data.fwbs.specific_heat_liq,
+                    temp_in_coolant=self.data.fwbs.inlet_temp_liq,
+                    temp_out_coolant=self.data.fwbs.outlet_temp_liq,
                 )
 
         # If the blanket is single-coolant with liquid metal breeder...
         elif self.data.fwbs.i_blkt_dual_coolant == 1:
             # Mass flow rate for outboard blanket coolant (kg/s)
             self.data.blanket.mflow_blkt_outboard_coolant = (
-                1.0e6
-                * (self.data.blanket.p_blkt_nuclear_heat_outboard_mw)
-                / (
-                    self.data.fwbs.cp_bl
-                    * (self.data.fwbs.temp_blkt_coolant_out - temp_blkt_coolant_in)
+                calculate_required_mass_flow_rate(
+                    p_heat_total=1.0e6
+                    * self.data.blanket.p_blkt_nuclear_heat_outboard_mw,
+                    heatcap_coolant=self.data.fwbs.cp_bl,
+                    temp_in_coolant=temp_blkt_coolant_in,
+                    temp_out_coolant=self.data.fwbs.temp_blkt_coolant_out,
                 )
             )
 
@@ -2475,13 +2481,15 @@ def thermo_hydraulic_model(self, output: bool):
             ):
                 # Mass flow rate for inboard blanket coolant (kg/s)
                 self.data.blanket.mflow_blkt_inboard_coolant = (
-                    1.0e6
-                    * (self.data.blanket.p_blkt_nuclear_heat_inboard_mw)
-                    / (
-                        self.data.fwbs.cp_bl
-                        * (self.data.fwbs.temp_blkt_coolant_out - temp_blkt_coolant_in)
+                    calculate_required_mass_flow_rate(
+                        p_heat_total=1.0e6
+                        * self.data.blanket.p_blkt_nuclear_heat_inboard_mw,
+                        heatcap_coolant=self.data.fwbs.cp_bl,
+                        temp_in_coolant=temp_blkt_coolant_in,
+                        temp_out_coolant=self.data.fwbs.temp_blkt_coolant_out,
                     )
                 )
+
                 # Mass flow rate for inboard breeder flow (kg/s)
                 self.data.fwbs.mfblkti_liq = (
                     self.data.fwbs.n_liq_recirc * self.data.fwbs.wht_liq_ib
@@ -2491,11 +2499,12 @@ def thermo_hydraulic_model(self, output: bool):
         else:
             # Mass flow rate for inboard blanket coolant (kg/s)
             self.data.blanket.mflow_blkt_outboard_coolant = (
-                1.0e6
-                * (self.data.blanket.p_blkt_nuclear_heat_outboard_mw)
-                / (
-                    self.data.fwbs.cp_bl
-                    * (self.data.fwbs.temp_blkt_coolant_out - temp_blkt_coolant_in)
+                calculate_required_mass_flow_rate(
+                    p_heat_total=1.0e6
+                    * self.data.blanket.p_blkt_nuclear_heat_outboard_mw,
+                    heatcap_coolant=self.data.fwbs.cp_bl,
+                    temp_in_coolant=temp_blkt_coolant_in,
+                    temp_out_coolant=self.data.fwbs.temp_blkt_coolant_out,
                 )
             )
 
@@ -2506,11 +2515,12 @@ def thermo_hydraulic_model(self, output: bool):
                 == InboardBlanketConfiguration.INBOARD_BLANKET_PRESENT
             ):
                 self.data.blanket.mflow_blkt_inboard_coolant = (
-                    1.0e6
-                    * (self.data.blanket.p_blkt_nuclear_heat_inboard_mw)
-                    / (
-                        self.data.fwbs.cp_bl
-                        * (self.data.fwbs.temp_blkt_coolant_out - temp_blkt_coolant_in)
+                    calculate_required_mass_flow_rate(
+                        p_heat_total=1.0e6
+                        * self.data.blanket.p_blkt_nuclear_heat_inboard_mw,
+                        heatcap_coolant=self.data.fwbs.cp_bl,
+                        temp_in_coolant=temp_blkt_coolant_in,
+                        temp_out_coolant=self.data.fwbs.temp_blkt_coolant_out,
                     )
                 )
 
diff --git a/process/models/engineering/pumping.py b/process/models/engineering/pumping.py
index 68fdedbe5f..537b9b4d0b 100644
--- a/process/models/engineering/pumping.py
+++ b/process/models/engineering/pumping.py
@@ -299,3 +299,37 @@ def elbow_coeff(
 
     # Elbow Coefficient
     return ximt + xift
+
+
+def calculate_required_mass_flow_rate(
+    p_heat_total: float,
+    heatcap_coolant: float,
+    temp_in_coolant: float,
+    temp_out_coolant: float,
+) -> float:
+    """Calculate the required mass flow rate of coolant to remove the specified heat
+    load, due to the fundamental energy balance formula.
+
+    Parameters
+    ----------
+    p_heat_total:
+        Total heat load to be removed (W).
+    heatcap_coolant:
+        Specific heat capacity of the coolant (J/kg/K).
+    temp_in_coolant:
+        Inlet temperature of the coolant (K).
+    temp_out_coolant:
+        Outlet temperature of the coolant (K).
+
+    Returns
+    -------
+    float
+        Required mass flow rate of the coolant (kg/s).
+
+    Notes
+    -----
+    The heat capacity is assumed to be constant over the temperature range of the
+    coolant.
+
+    """
+    return p_heat_total / (heatcap_coolant * (temp_out_coolant - temp_in_coolant))
diff --git a/tests/unit/models/engineering/test_pumping.py b/tests/unit/models/engineering/test_pumping.py
index 5e85511dda..bc5fbee253 100644
--- a/tests/unit/models/engineering/test_pumping.py
+++ b/tests/unit/models/engineering/test_pumping.py
@@ -1,6 +1,7 @@
 import pytest
 
 from process.models.engineering.pumping import (
+    calculate_required_mass_flow_rate,
     calculate_reynolds_number,
     darcy_friction_haaland,
     elbow_coeff,
@@ -47,3 +48,31 @@ def test_elbow_coeff():
     assert elbow_coeff(1, 90, 1, 0.1) == pytest.approx(15.774371098812502, rel=1e-3)
     assert elbow_coeff(0.1, 90, 1, 1) == pytest.approx(66.57, rel=1e-3)
     assert elbow_coeff(1, 90, 0.1, 1) == pytest.approx(0.3670796326794896, rel=1e-3)
+
+
+def test_calculate_required_mass_flow_rate():
+    assert calculate_required_mass_flow_rate(
+        p_heat_total=1000.0,
+        heatcap_coolant=100.0,
+        temp_in_coolant=300.0,
+        temp_out_coolant=310.0,
+    ) == pytest.approx(1.0)
+
+
+def test_calculate_required_mass_flow_rate_with_realistic_values():
+    assert calculate_required_mass_flow_rate(
+        p_heat_total=50000.0,
+        heatcap_coolant=4180.0,
+        temp_in_coolant=293.15,
+        temp_out_coolant=313.15,
+    ) == pytest.approx(0.5980861244019139)
+
+
+def test_calculate_required_mass_flow_rate_zero_temperature_rise():
+    with pytest.raises(ZeroDivisionError):
+        calculate_required_mass_flow_rate(
+            p_heat_total=1000.0,
+            heatcap_coolant=4180.0,
+            temp_in_coolant=300.0,
+            temp_out_coolant=300.0,
+        )

From 595ddf26855b776a95992d600d2500cec25ad0b3 Mon Sep 17 00:00:00 2001
From: mn3981 <christopher.ashe@ukaea.uk>
Date: Fri, 5 Jun 2026 18:22:28 +0100
Subject: [PATCH 09/33] =?UTF-8?q?=F0=9F=94=84=20Rename=20FW=20and=20Blkt?=
 =?UTF-8?q?=20heat=20capacity=20variables?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 documentation/source/development/standards.md |  8 ++++
 process/data_structure/fwbs_variables.py      | 16 +++----
 process/models/blankets/blanket_library.py    | 48 ++++++++++++-------
 .../models/blankets/test_blanket_library.py   | 48 +++++++++++--------
 4 files changed, 76 insertions(+), 44 deletions(-)

diff --git a/documentation/source/development/standards.md b/documentation/source/development/standards.md
index ef0feaeda9..ce752152ec 100644
--- a/documentation/source/development/standards.md
+++ b/documentation/source/development/standards.md
@@ -259,6 +259,14 @@ This should be used for units of $\text{kg} \cdot \text{m}^{-2}\text{s}^{-1}$
 
 ---------------------
 
+##### Specific Heat Capacities
+
+- Specific heat capacities for materials $[\text{J/kg/K}]$ should start with the `heatcap_` prefix
+- Specific heat capacities at constant volume should start with the `heatcap_vol_` pefix
+- Specific heat capacities at constant pressure should start with the `heatcap_pres_` pefix
+
+---------------------
+
 ##### Pressures
 
 - Pressures should start with the `pres_` prefix
diff --git a/process/data_structure/fwbs_variables.py b/process/data_structure/fwbs_variables.py
index acd52894d6..160a0d5838 100644
--- a/process/data_structure/fwbs_variables.py
+++ b/process/data_structure/fwbs_variables.py
@@ -635,17 +635,17 @@ class FWBSData:
     visc_blkt_coolant: float = 0.0
     """Viscosity of the blanket primary coolant"""
 
-    cp_fw: float = 0.0
-    """Spesific heat for FW and blanket primary coolant(s)"""
+    heatcap_pres_fw_coolant_average: float = 0.0
+    """FW coolant average specific heat capacity at constant pressure [J/kg/K]"""
 
-    cv_fw: float = 0.0
-    """Spesific heat for FW and blanket primary coolant(s)"""
+    heatcap_vol_fw_coolant_average: float = 0.0
+    """FW coolant average specific heat capacity at constant volume [J/kg/K]"""
 
-    cp_bl: float = 0.0
-    """Spesific heat for FW and blanket primary coolant(s)"""
+    heatcap_pres_blkt_coolant_average: float = 0.0
+    """Blanket coolant average specific heat capacity at constant pressure [J/kg/K]"""
 
-    cv_bl: float = 0.0
-    """Spesific heat for FW and blanket primary coolant(s)"""
+    heatcap_vol_blkt_coolant_average: float = 0.0
+    """Blanket coolant average specific heat capacity at constant volume [J/kg/K]"""
 
     f_nuc_pow_bz_struct: float = 0.34
     """For a dual-coolant blanket, fraction of BZ power cooled by primary coolant"""
diff --git a/process/models/blankets/blanket_library.py b/process/models/blankets/blanket_library.py
index c3bdc2fc2c..094905ab91 100644
--- a/process/models/blankets/blanket_library.py
+++ b/process/models/blankets/blanket_library.py
@@ -736,14 +736,22 @@ def primary_coolant_properties(self, output: bool):
                 pressure=self.data.fwbs.pres_fw_coolant,
             )
             self.data.fwbs.den_fw_coolant = fw_bb_fluid_properties.density
-            self.data.fwbs.cp_fw = fw_bb_fluid_properties.specific_heat_const_p
-            self.data.fwbs.cv_fw = fw_bb_fluid_properties.specific_heat_const_v
+            self.data.fwbs.heatcap_pres_fw_coolant_average = (
+                fw_bb_fluid_properties.specific_heat_const_p
+            )
+            self.data.fwbs.heatcap_vol_fw_coolant_average = (
+                fw_bb_fluid_properties.specific_heat_const_v
+            )
             self.data.fwbs.visc_fw_coolant = fw_bb_fluid_properties.viscosity
 
             self.data.fwbs.den_blkt_coolant = self.data.fwbs.den_fw_coolant
             self.data.fwbs.visc_blkt_coolant = self.data.fwbs.visc_fw_coolant
-            self.data.fwbs.cp_bl = self.data.fwbs.cp_fw
-            self.data.fwbs.cv_bl = self.data.fwbs.cv_fw
+            self.data.fwbs.heatcap_pres_blkt_coolant_average = (
+                self.data.fwbs.heatcap_pres_fw_coolant_average
+            )
+            self.data.fwbs.heatcap_vol_blkt_coolant_average = (
+                self.data.fwbs.heatcap_vol_fw_coolant_average
+            )
 
         # If FW and BB have different coolants...
         else:
@@ -757,8 +765,12 @@ def primary_coolant_properties(self, output: bool):
                 pressure=self.data.fwbs.pres_fw_coolant,
             )
             self.data.fwbs.den_fw_coolant = fw_fluid_properties.density
-            self.data.fwbs.cp_fw = fw_fluid_properties.specific_heat_const_p
-            self.data.fwbs.cv_fw = fw_fluid_properties.specific_heat_const_v
+            self.data.fwbs.heatcap_pres_fw_coolant_average = (
+                fw_fluid_properties.specific_heat_const_p
+            )
+            self.data.fwbs.heatcap_vol_fw_coolant_average = (
+                fw_fluid_properties.specific_heat_const_v
+            )
             self.data.fwbs.visc_fw_coolant = fw_fluid_properties.viscosity
 
             # BB
@@ -772,8 +784,12 @@ def primary_coolant_properties(self, output: bool):
                 pressure=self.data.fwbs.pres_blkt_coolant,
             )
             self.data.fwbs.den_blkt_coolant = bb_fluid_properties.density
-            self.data.fwbs.cp_bl = bb_fluid_properties.specific_heat_const_p
-            self.data.fwbs.cv_bl = bb_fluid_properties.specific_heat_const_v
+            self.data.fwbs.heatcap_pres_blkt_coolant_average = (
+                bb_fluid_properties.specific_heat_const_p
+            )
+            self.data.fwbs.heatcap_vol_blkt_coolant_average = (
+                bb_fluid_properties.specific_heat_const_v
+            )
             self.data.fwbs.visc_blkt_coolant = bb_fluid_properties.viscosity
 
         if (
@@ -2391,7 +2407,7 @@ def thermo_hydraulic_model(self, output: bool):
                     self.data.blanket.p_fw_inboard_nuclear_heat_mw
                     + self.data.fwbs.psurffwi
                 ),
-                heatcap_coolant=self.data.fwbs.cp_fw,
+                heatcap_coolant=self.data.fwbs.heatcap_pres_fw_coolant_average,
                 temp_in_coolant=temp_fw_coolant_out,
                 temp_out_coolant=self.data.fwbs.temp_fw_coolant_in,
             )
@@ -2405,7 +2421,7 @@ def thermo_hydraulic_model(self, output: bool):
                     self.data.blanket.p_fw_outboard_nuclear_heat_mw
                     + self.data.fwbs.psurffwo
                 ),
-                heatcap_coolant=self.data.fwbs.cp_fw,
+                heatcap_coolant=self.data.fwbs.heatcap_pres_fw_coolant_average,
                 temp_in_coolant=temp_fw_coolant_out,
                 temp_out_coolant=self.data.fwbs.temp_fw_coolant_in,
             )
@@ -2417,7 +2433,7 @@ def thermo_hydraulic_model(self, output: bool):
             self.data.blanket.mflow_blkt_outboard_coolant = (
                 calculate_required_mass_flow_rate(
                     p_heat_total=1.0e6 * pnucblkto_struct,
-                    heatcap_coolant=self.data.fwbs.cp_bl,
+                    heatcap_coolant=self.data.fwbs.heatcap_pres_blkt_coolant_average,
                     temp_in_coolant=temp_blkt_coolant_in,
                     temp_out_coolant=self.data.fwbs.temp_blkt_coolant_out,
                 )
@@ -2439,7 +2455,7 @@ def thermo_hydraulic_model(self, output: bool):
                 self.data.blanket.mflow_blkt_inboard_coolant = (
                     calculate_required_mass_flow_rate(
                         p_heat_total=1.0e6 * pnucblkti_struct,
-                        heatcap_coolant=self.data.fwbs.cp_bl,
+                        heatcap_coolant=self.data.fwbs.heatcap_pres_blkt_coolant_average,
                         temp_in_coolant=temp_blkt_coolant_in,
                         temp_out_coolant=self.data.fwbs.temp_blkt_coolant_out,
                     )
@@ -2459,7 +2475,7 @@ def thermo_hydraulic_model(self, output: bool):
                 calculate_required_mass_flow_rate(
                     p_heat_total=1.0e6
                     * self.data.blanket.p_blkt_nuclear_heat_outboard_mw,
-                    heatcap_coolant=self.data.fwbs.cp_bl,
+                    heatcap_coolant=self.data.fwbs.heatcap_pres_blkt_coolant_average,
                     temp_in_coolant=temp_blkt_coolant_in,
                     temp_out_coolant=self.data.fwbs.temp_blkt_coolant_out,
                 )
@@ -2484,7 +2500,7 @@ def thermo_hydraulic_model(self, output: bool):
                     calculate_required_mass_flow_rate(
                         p_heat_total=1.0e6
                         * self.data.blanket.p_blkt_nuclear_heat_inboard_mw,
-                        heatcap_coolant=self.data.fwbs.cp_bl,
+                        heatcap_coolant=self.data.fwbs.heatcap_pres_blkt_coolant_average,
                         temp_in_coolant=temp_blkt_coolant_in,
                         temp_out_coolant=self.data.fwbs.temp_blkt_coolant_out,
                     )
@@ -2502,7 +2518,7 @@ def thermo_hydraulic_model(self, output: bool):
                 calculate_required_mass_flow_rate(
                     p_heat_total=1.0e6
                     * self.data.blanket.p_blkt_nuclear_heat_outboard_mw,
-                    heatcap_coolant=self.data.fwbs.cp_bl,
+                    heatcap_coolant=self.data.fwbs.heatcap_pres_blkt_coolant_average,
                     temp_in_coolant=temp_blkt_coolant_in,
                     temp_out_coolant=self.data.fwbs.temp_blkt_coolant_out,
                 )
@@ -2518,7 +2534,7 @@ def thermo_hydraulic_model(self, output: bool):
                     calculate_required_mass_flow_rate(
                         p_heat_total=1.0e6
                         * self.data.blanket.p_blkt_nuclear_heat_inboard_mw,
-                        heatcap_coolant=self.data.fwbs.cp_bl,
+                        heatcap_coolant=self.data.fwbs.heatcap_pres_blkt_coolant_average,
                         temp_in_coolant=temp_blkt_coolant_in,
                         temp_out_coolant=self.data.fwbs.temp_blkt_coolant_out,
                     )
diff --git a/tests/unit/models/blankets/test_blanket_library.py b/tests/unit/models/blankets/test_blanket_library.py
index cb1bf19180..b4053bbba7 100644
--- a/tests/unit/models/blankets/test_blanket_library.py
+++ b/tests/unit/models/blankets/test_blanket_library.py
@@ -29,9 +29,9 @@ class PrimaryCoolantPropertiesParam(NamedTuple):
 
     den_fw_coolant: Any = None
 
-    cp_fw: Any = None
+    heatcap_pres_fw_coolant_average: Any = None
 
-    cv_fw: Any = None
+    heatcap_vol_fw_coolant_average: Any = None
 
     i_blkt_coolant_type: Any = None
 
@@ -47,9 +47,9 @@ class PrimaryCoolantPropertiesParam(NamedTuple):
 
     visc_blkt_coolant: Any = None
 
-    cp_bl: Any = None
+    heatcap_pres_blkt_coolant_average: Any = None
 
-    cv_bl: Any = None
+    heatcap_vol_blkt_coolant_average: Any = None
 
     visc_fw_coolant: Any = None
 
@@ -81,8 +81,8 @@ class PrimaryCoolantPropertiesParam(NamedTuple):
             temp_fw_coolant_out=773,
             pres_fw_coolant=8000000,
             den_fw_coolant=0,
-            cp_fw=0,
-            cv_fw=0,
+            heatcap_pres_fw_coolant_average=0,
+            heatcap_vol_fw_coolant_average=0,
             i_blkt_coolant_type=CoolantType.HELIUM,
             temp_blkt_coolant_in=573,
             temp_blkt_coolant_out=773,
@@ -90,8 +90,8 @@ class PrimaryCoolantPropertiesParam(NamedTuple):
             den_blkt_coolant=0,
             i_blkt_dual_coolant=2,
             visc_blkt_coolant=0,
-            cp_bl=0,
-            cv_bl=0,
+            heatcap_pres_blkt_coolant_average=0,
+            heatcap_vol_blkt_coolant_average=0,
             visc_fw_coolant=0,
             i_fw_blkt_shared_coolant=0,
             expected_den_fw_coolant=5.6389735407435868,
@@ -109,8 +109,8 @@ class PrimaryCoolantPropertiesParam(NamedTuple):
             temp_fw_coolant_out=773,
             pres_fw_coolant=8000000,
             den_fw_coolant=5.6389735407435868,
-            cp_fw=5188.5588430173211,
-            cv_fw=3123.5687263525392,
+            heatcap_pres_fw_coolant_average=5188.5588430173211,
+            heatcap_vol_fw_coolant_average=3123.5687263525392,
             i_blkt_coolant_type=CoolantType.HELIUM,
             temp_blkt_coolant_in=573,
             temp_blkt_coolant_out=773,
@@ -118,8 +118,8 @@ class PrimaryCoolantPropertiesParam(NamedTuple):
             den_blkt_coolant=5.6389735407435868,
             i_blkt_dual_coolant=2,
             visc_blkt_coolant=3.5036293160410249e-05,
-            cp_bl=5188.5588430173211,
-            cv_bl=3123.5687263525392,
+            heatcap_pres_blkt_coolant_average=5188.5588430173211,
+            heatcap_vol_blkt_coolant_average=3123.5687263525392,
             visc_fw_coolant=3.5036293160410249e-05,
             i_fw_blkt_shared_coolant=0,
             expected_den_fw_coolant=5.6389735407435868,
@@ -179,11 +179,15 @@ def test_primary_coolant_properties(
     )
 
     monkeypatch.setattr(
-        blanket_library.data.fwbs, "cp_fw", primarycoolantpropertiesparam.cp_fw
+        blanket_library.data.fwbs,
+        "heatcap_pres_fw_coolant_average",
+        primarycoolantpropertiesparam.heatcap_pres_fw_coolant_average,
     )
 
     monkeypatch.setattr(
-        blanket_library.data.fwbs, "cv_fw", primarycoolantpropertiesparam.cv_fw
+        blanket_library.data.fwbs,
+        "heatcap_vol_fw_coolant_average",
+        primarycoolantpropertiesparam.heatcap_vol_fw_coolant_average,
     )
 
     monkeypatch.setattr(
@@ -229,11 +233,15 @@ def test_primary_coolant_properties(
     )
 
     monkeypatch.setattr(
-        blanket_library.data.fwbs, "cp_bl", primarycoolantpropertiesparam.cp_bl
+        blanket_library.data.fwbs,
+        "heatcap_pres_blkt_coolant_average",
+        primarycoolantpropertiesparam.heatcap_pres_blkt_coolant_average,
     )
 
     monkeypatch.setattr(
-        blanket_library.data.fwbs, "cv_bl", primarycoolantpropertiesparam.cv_bl
+        blanket_library.data.fwbs,
+        "heatcap_vol_blkt_coolant_average",
+        primarycoolantpropertiesparam.heatcap_vol_blkt_coolant_average,
     )
 
     monkeypatch.setattr(
@@ -254,11 +262,11 @@ def test_primary_coolant_properties(
         primarycoolantpropertiesparam.expected_den_fw_coolant, rel=1e-4
     )
 
-    assert blanket_library.data.fwbs.cp_fw == pytest.approx(
+    assert blanket_library.data.fwbs.heatcap_pres_fw_coolant_average == pytest.approx(
         primarycoolantpropertiesparam.expected_cp_fw, rel=1e-4
     )
 
-    assert blanket_library.data.fwbs.cv_fw == pytest.approx(
+    assert blanket_library.data.fwbs.heatcap_vol_fw_coolant_average == pytest.approx(
         primarycoolantpropertiesparam.expected_cv_fw, rel=1e-4
     )
 
@@ -270,11 +278,11 @@ def test_primary_coolant_properties(
         primarycoolantpropertiesparam.expected_visc_blkt_coolant, rel=1e-4
     )
 
-    assert blanket_library.data.fwbs.cp_bl == pytest.approx(
+    assert blanket_library.data.fwbs.heatcap_pres_blkt_coolant_average == pytest.approx(
         primarycoolantpropertiesparam.expected_cp_bl, rel=1e-4
     )
 
-    assert blanket_library.data.fwbs.cv_bl == pytest.approx(
+    assert blanket_library.data.fwbs.heatcap_vol_blkt_coolant_average == pytest.approx(
         primarycoolantpropertiesparam.expected_cv_bl, rel=1e-4
     )
 

From 23740c913a1360ee404c6413839e405f1b422285 Mon Sep 17 00:00:00 2001
From: mn3981 <christopher.ashe@ukaea.uk>
Date: Fri, 5 Jun 2026 23:13:55 +0100
Subject: [PATCH 10/33] Add output for outboard blanket piping

---
 process/core/io/plot/summary.py | 66 ++++++++++++++++++++++++---------
 1 file changed, 48 insertions(+), 18 deletions(-)

diff --git a/process/core/io/plot/summary.py b/process/core/io/plot/summary.py
index be0cfad3c8..bb76530102 100644
--- a/process/core/io/plot/summary.py
+++ b/process/core/io/plot/summary.py
@@ -16805,7 +16805,43 @@ def plot_outboard_blanket_coolant_properties(fig: plt.Figure, m_file: MFile, sca
     axes[1, 1].axis("off")
 
     fig.tight_layout()
+    
 
+def plot_blanket_coolant_channel_structure_and_properties(fig: plt.Figure, m_file: MFile, scan: int):
+    """Combined plot of blanket coolant channel structure and properties."""
+    
+    # Add info about the Winding Pack
+    textstr_outboard_blkt = (
+        f"$\\mathbf{{Outboard \\ blanket:}}$\n \n"
+        f"Radial coolant channel length: {m_file.get('len_blkt_outboard_coolant_channel_radial', scan=scan):.4f}\n"
+        f"Toroidal coolant channel length: {m_file.get('len_blkt_outboard_coolant_channel_toroidal', scan=scan):.4f}\n"
+        f"Number of radial channels: {m_file.get('n_blkt_outboard_coolant_channels_radial', scan=scan)}\n"
+        f"Number of poloidal channels: {m_file.get('n_blkt_outboard_coolant_channels_poloidal', scan=scan)}\n"
+        f"Stored energy of all coils: {m_file.get('e_tf_magnetic_stored_total_gj', scan=scan):.4f} GJ\n"
+        f"Stored energy of a single coil: {m_file.get('e_tf_coil_magnetic_stored', scan=scan) / 1e9:.2f} GJ\n"
+        f"Total area of steel in coil: {m_file.get('a_tf_coil_inboard_steel', scan=scan):.4f} $\\mathrm{{m}}^2$\n"
+        f"Total area fraction of steel: {m_file.get('f_a_tf_coil_inboard_steel', scan=scan):.4f}\n"
+        f"Total area fraction of insulation: {m_file.get('f_a_tf_coil_inboard_insulation', scan=scan):.4f}\n"
+        f"$A$, all insulation in coil: {m_file.get('a_tf_coil_inboard_insulation', scan=scan):.4f} $\\mathrm{{m}}^2$\n"
+    )
+    
+    fig.text(
+        0.775,
+        0.58,
+        textstr_outboard_blkt,
+        fontsize=9,
+        verticalalignment="top",
+        horizontalalignment="left",
+        transform=fig.transFigure,
+        bbox={
+            "boxstyle": "round",
+            "facecolor": "wheat",
+            "alpha": 1.0,
+            "linewidth": 2,
+        },
+    )
+    
+    
 
 def main_plot(
     m_file: MFile,
@@ -17426,32 +17462,26 @@ def _add_page(name: str | None = None):
     )
     plot_fw_90_deg_pipe_bend(pages["fw_td_cross_section"].add_subplot(337), m_file, scan)
 
-    plot_blkt_pipe_bends(_add_page("blkt_pipe_bends"), m_file, scan)
-    ax_blanket = pages["blkt_pipe_bends"].add_subplot(122, aspect="equal")
-    plot_blkt_structure(
-        ax_blanket,
-        pages["blkt_pipe_bends"],
-        m_file,
-        scan,
-        radial_build,
-        colour_scheme,
-    )
+    
+    ax_blanket = figs[34].add_subplot(122, aspect="equal")
+    plot_blkt_structure(ax_blanket, figs[34], m_file, scan, radial_build, colour_scheme)
+    
+    plot_blkt_pipe_bends(figs[35], m_file, scan)
+    plot_blanket_coolant_channel_structure(figs[35].add_subplot(111), m_file, scan)
+    plot_blanket_coolant_channel_structure_and_properties(figs[35], m_file, scan)
 
     plot_main_power_flow(
-        _add_page("main_power_flow").add_subplot(111, aspect="equal"),
-        m_file,
-        scan,
-        pages["main_power_flow"],
+        figs[36].add_subplot(111, aspect="equal"), m_file, scan, figs[36]
     )
 
-    ax24 = _add_page("power_profile_over_time").add_subplot(111)
+    ax24 = figs[37].add_subplot(111)
     # set_position([left, bottom, width, height]) -> height ~ 0.66 => ~2/3 of page height
     ax24.set_position([0.08, 0.35, 0.84, 0.57])
-    plot_system_power_profiles_over_time(ax24, m_file, scan, figs[36])
+    plot_system_power_profiles_over_time(ax24, m_file, scan, figs[37])
 
-    plot_blanket_coolant_channel_structure(figs[37].add_subplot(111), m_file, scan)
+    
 
-    plot_outboard_blanket_coolant_properties(figs[37], m_file, scan)
+    # plot_outboard_blanket_coolant_properties(figs[37], m_file, scan)
 
 
 def create_thickness_builds(m_file, scan: int):

From 641860cba3ce0e267565119618ade227cd9eb1e2 Mon Sep 17 00:00:00 2001
From: mn3981 <christopher.ashe@ukaea.uk>
Date: Sat, 6 Jun 2026 00:12:24 +0100
Subject: [PATCH 11/33] Add output table for outboard blanket

---
 process/core/io/plot/summary.py            | 48 ++++++++++++----------
 process/data_structure/fwbs_variables.py   |  2 +-
 process/models/blankets/blanket_library.py |  8 ++--
 3 files changed, 32 insertions(+), 26 deletions(-)

diff --git a/process/core/io/plot/summary.py b/process/core/io/plot/summary.py
index bb76530102..e7ab380956 100644
--- a/process/core/io/plot/summary.py
+++ b/process/core/io/plot/summary.py
@@ -16807,27 +16807,37 @@ def plot_outboard_blanket_coolant_properties(fig: plt.Figure, m_file: MFile, sca
     fig.tight_layout()
     
 
-def plot_blanket_coolant_channel_structure_and_properties(fig: plt.Figure, m_file: MFile, scan: int):
+
+def plot_blanket_coolant_channel_structure_and_properties(
+    fig: plt.Figure, m_file: MFile, scan: int
+):
     """Combined plot of blanket coolant channel structure and properties."""
-    
     # Add info about the Winding Pack
     textstr_outboard_blkt = (
         f"$\\mathbf{{Outboard \\ blanket:}}$\n \n"
-        f"Radial coolant channel length: {m_file.get('len_blkt_outboard_coolant_channel_radial', scan=scan):.4f}\n"
-        f"Toroidal coolant channel length: {m_file.get('len_blkt_outboard_coolant_channel_toroidal', scan=scan):.4f}\n"
-        f"Number of radial channels: {m_file.get('n_blkt_outboard_coolant_channels_radial', scan=scan)}\n"
-        f"Number of poloidal channels: {m_file.get('n_blkt_outboard_coolant_channels_poloidal', scan=scan)}\n"
-        f"Stored energy of all coils: {m_file.get('e_tf_magnetic_stored_total_gj', scan=scan):.4f} GJ\n"
-        f"Stored energy of a single coil: {m_file.get('e_tf_coil_magnetic_stored', scan=scan) / 1e9:.2f} GJ\n"
-        f"Total area of steel in coil: {m_file.get('a_tf_coil_inboard_steel', scan=scan):.4f} $\\mathrm{{m}}^2$\n"
-        f"Total area fraction of steel: {m_file.get('f_a_tf_coil_inboard_steel', scan=scan):.4f}\n"
-        f"Total area fraction of insulation: {m_file.get('f_a_tf_coil_inboard_insulation', scan=scan):.4f}\n"
-        f"$A$, all insulation in coil: {m_file.get('a_tf_coil_inboard_insulation', scan=scan):.4f} $\\mathrm{{m}}^2$\n"
+        f"Radius of blanket channel: {m_file.get('radius_blkt_channel', scan=scan):.4f} m\n"
+        f"Channel roughness ($\\epsilon$): {m_file.get('roughness_fw_channel', scan=scan):.4e} m\n\n"
+        f"Radial coolant channel length: {m_file.get('len_blkt_outboard_coolant_channel_radial', scan=scan):.4f} m\n"
+        f"Toroidal coolant channel length: {m_file.get('len_blkt_inboard_segment_toroidal', scan=scan):.4f} m\n"
+        f"Number of radial channels: {m_file.get('n_blkt_inboard_module_coolant_sections_radial', scan=scan)}\n"
+        f"Number of poloidal channels: {m_file.get('n_blkt_inboard_module_coolant_sections_poloidal', scan=scan)}\n"
+        f"Total length of coolant channel straight sections: {m_file.get('len_blkt_inboard_channel_total', scan=scan):.4f} m\n\n"
+        f"Pressure drop for straight sections: {m_file.get('dpres_blkt_outboard_coolant_channel_straight_total', scan=scan):.2e} Pa\n"
+        f"Pressure drop for 90° bends: {m_file.get('dpres_blkt_outboard_coolant_channel_90_bend', scan=scan):.2e} Pa\n"
+        f"Total pressure drop for 90° bends: {m_file.get('dpres_blkt_outboard_coolant_channel_90_bends_total', scan=scan):.2e} Pa\n"
+        f"Pressure drop for 180° bends: {m_file.get('dpres_blkt_outboard_coolant_channel_180_bend', scan=scan):.2e} Pa\n"
+        f"Total pressure drop for 180° bends: {m_file.get('dpres_blkt_outboard_coolant_channel_180_bends_total', scan=scan):.2e} Pa\n"
+        f"Total pressure drop for all bends: {m_file.get('dpres_blkt_outboard_bends_total', scan=scan):.2e} Pa\n\n"
+        f"Reynolds number ($Re$): {m_file.get('reynolds_blkt_outboard_coolant', scan=scan):.4f}\n"
+        f"Darcy Friction factor ($f$): {m_file.get('darcy_frict_blkt_outboard_coolant', scan=scan):.4f}\n\n"
+        f"Friction drop coefficient for straight sections: {m_file.get('f_straight_blkt_outboard_coolant', scan=scan):.4f}\n"
+        f"Friction drop coefficient for 90° bends: {m_file.get('f_elbow_blkt_outboard_90_bend', scan=scan):.4f}\n"
+        f"Friction drop coefficient for 180° bends: {m_file.get('f_elbow_blkt_outboard_180_bend', scan=scan):.4f}\n"
     )
-    
+
     fig.text(
-        0.775,
-        0.58,
+        0.5,
+        0.65,
         textstr_outboard_blkt,
         fontsize=9,
         verticalalignment="top",
@@ -16840,8 +16850,7 @@ def plot_blanket_coolant_channel_structure_and_properties(fig: plt.Figure, m_fil
             "linewidth": 2,
         },
     )
-    
-    
+
 
 def main_plot(
     m_file: MFile,
@@ -17462,10 +17471,9 @@ def _add_page(name: str | None = None):
     )
     plot_fw_90_deg_pipe_bend(pages["fw_td_cross_section"].add_subplot(337), m_file, scan)
 
-    
     ax_blanket = figs[34].add_subplot(122, aspect="equal")
     plot_blkt_structure(ax_blanket, figs[34], m_file, scan, radial_build, colour_scheme)
-    
+
     plot_blkt_pipe_bends(figs[35], m_file, scan)
     plot_blanket_coolant_channel_structure(figs[35].add_subplot(111), m_file, scan)
     plot_blanket_coolant_channel_structure_and_properties(figs[35], m_file, scan)
@@ -17479,8 +17487,6 @@ def _add_page(name: str | None = None):
     ax24.set_position([0.08, 0.35, 0.84, 0.57])
     plot_system_power_profiles_over_time(ax24, m_file, scan, figs[37])
 
-    
-
     # plot_outboard_blanket_coolant_properties(figs[37], m_file, scan)
 
 
diff --git a/process/data_structure/fwbs_variables.py b/process/data_structure/fwbs_variables.py
index 160a0d5838..c1ae7cfe75 100644
--- a/process/data_structure/fwbs_variables.py
+++ b/process/data_structure/fwbs_variables.py
@@ -310,7 +310,7 @@ class FWBSData:
     """peak first wall temperature [K]"""
 
     roughness_fw_channel: float = 1.0e-6
-    """first wall channel roughness epsilon [m]"""
+    """First wall channel roughness (ε) [m]"""
 
     len_fw_channel: float = 4.0
     """Length of a single first wall channel (all in parallel) [m]
diff --git a/process/models/blankets/blanket_library.py b/process/models/blankets/blanket_library.py
index 094905ab91..e4f4b72083 100644
--- a/process/models/blankets/blanket_library.py
+++ b/process/models/blankets/blanket_library.py
@@ -2408,8 +2408,8 @@ def thermo_hydraulic_model(self, output: bool):
                     + self.data.fwbs.psurffwi
                 ),
                 heatcap_coolant=self.data.fwbs.heatcap_pres_fw_coolant_average,
-                temp_in_coolant=temp_fw_coolant_out,
-                temp_out_coolant=self.data.fwbs.temp_fw_coolant_in,
+                temp_in_coolant=self.data.fwbs.temp_fw_coolant_in,
+                temp_out_coolant=temp_fw_coolant_out,
             )
         )
 
@@ -2422,8 +2422,8 @@ def thermo_hydraulic_model(self, output: bool):
                     + self.data.fwbs.psurffwo
                 ),
                 heatcap_coolant=self.data.fwbs.heatcap_pres_fw_coolant_average,
-                temp_in_coolant=temp_fw_coolant_out,
-                temp_out_coolant=self.data.fwbs.temp_fw_coolant_in,
+                temp_in_coolant=self.data.fwbs.temp_fw_coolant_in,
+                temp_out_coolant=temp_fw_coolant_out,
             )
         )
 

From 7dabfcb6ffe13aade2ef7bb7eb30df6847a259f7 Mon Sep 17 00:00:00 2001
From: chris-ashe <christopher.ashe@ukaea.uk>
Date: Sun, 7 Jun 2026 17:00:36 +0100
Subject: [PATCH 12/33] Refactor coolant friction loss parameters and update
 related tests

---
 process/models/blankets/blanket_library.py    |  34 +++--
 .../models/blankets/test_blanket_library.py   | 119 +++++++++---------
 2 files changed, 80 insertions(+), 73 deletions(-)

diff --git a/process/models/blankets/blanket_library.py b/process/models/blankets/blanket_library.py
index e4f4b72083..345fb09a38 100644
--- a/process/models/blankets/blanket_library.py
+++ b/process/models/blankets/blanket_library.py
@@ -3049,6 +3049,8 @@ def total_pressure_drop(
                 den_coolant=den_coolant,
                 visc_coolant=visc_coolant_dynamic,
                 vel_coolant=vel_coolant,
+                roughness_channel=self.data.fwbs.roughness_fw_channel,
+                radius_channel=self.data.fwbs.radius_fw_channel,
             )
         )
         dpres_friction = friction_params.dpres_total
@@ -3243,6 +3245,8 @@ def coolant_friction_pressure_drop(
         den_coolant: float,
         visc_coolant: float,
         vel_coolant: float,
+        roughness_channel: float,
+        radius_channel: float,
     ) -> CoolantFrictionLossParameters:
         """Pressure drops are calculated for a pipe with a number of 90
         and 180 degree bends. The pressure drop due to frictional forces along
@@ -3255,26 +3259,30 @@ def coolant_friction_pressure_drop(
         i_ps :
             switch for primary or secondary coolant
         radius_pipe_90_deg_bend :
-            radius of 90 degree bend in pipe (m)
+            radius of 90 degree bend in pipe [m]
         radius_pipe_180_deg_bend :
-            radius of 180 degree bend in pipe (m)
+            radius of 180 degree bend in pipe [m]
         n_pipe_90_deg_bends :
             number of 90 degree bends in the pipe
         n_pipe_180_deg_bends :
             number of 180 degree bends in the pipe
         len_pipe :
-            total flow length along pipe (m)
+            total flow length along pipe [m]
         den_coolant :
-            coolant density (kg/m³)
+            coolant density [kg/m³]
         visc_coolant :
-            coolant viscosity (Pa s)
+            coolant viscosity [Pa s]
         vel_coolant :
-            coolant flow velocity (m/s)
+            coolant flow velocity [m/s]
+        roughness_channel :
+            roughness of the channel wall (ε) [m]
+        radius_channel :
+            radius of the channel [m]
 
         Returns
         -------
         :
-            CoolantFrictionLossParameters dataclass containing:
+            `CoolantFrictionLossParameters` dataclass containing:
             - Total pressure drop due to friction (Pa)
             - Pressure drop due to straight sections (Pa)
             - Pressure drop due to 90 degree bends (Pa)
@@ -3300,7 +3308,7 @@ def coolant_friction_pressure_drop(
             N.B. Darcy friction factor is estimated from the Haaland approximation.
         """
         # Calculate hydraulic dimater for round or retancular pipe (m)
-        dia_pipe = self.pipe_hydraulic_diameter(i_ps)
+        dia_pipe = self.pipe_hydraulic_diameter(i_channel_shape=i_ps)
 
         # Reynolds number
         reynolds_number = calculate_reynolds_number(
@@ -3311,15 +3319,15 @@ def coolant_friction_pressure_drop(
         )
 
         # Calculate Darcy friction factor
-        # N.B. friction function Uses Haaland approx.
-        # which assumes a filled circular pipe.
-        # Use dh which allows us to do fluid calculations for non-cicular tubes
+        # N.B. friction function Uses Haaland approx. which assumes a filled
+        # circular pipe.
+        # Use dh which allows us to do fluid calculations for non-circular tubes
         # (dh is estimate appropriate for fully developed flow).
 
         darcy_friction_factor = darcy_friction_haaland(
             reynolds=reynolds_number,
-            roughness_channel=self.data.fwbs.roughness_fw_channel,
-            radius_channel=self.data.fwbs.radius_fw_channel,
+            roughness_channel=roughness_channel,
+            radius_channel=radius_channel,
         )
 
         # Pressure drop coefficient
diff --git a/tests/unit/models/blankets/test_blanket_library.py b/tests/unit/models/blankets/test_blanket_library.py
index b4053bbba7..5c4ecde54b 100644
--- a/tests/unit/models/blankets/test_blanket_library.py
+++ b/tests/unit/models/blankets/test_blanket_library.py
@@ -1,4 +1,4 @@
-from typing import Any, NamedTuple
+from typing import TYPE_CHECKING, Any, NamedTuple
 
 import numpy as np
 import pytest
@@ -7,6 +7,9 @@
 from process.models.blankets.blanket_library import InboardBlanket
 from process.models.engineering.pumping import CoolantType
 
+if TYPE_CHECKING:
+    from process.models.engineering.pumping import CoolantFrictionLossParameters
+
 
 @pytest.fixture
 def blanket_library(process_models):
@@ -1022,110 +1025,106 @@ def test_liquid_breeder_properties(
     )
 
 
-class PressureDropParam(NamedTuple):
-    radius_fw_channel: Any = None
+class CoolantFrictionLossParam(NamedTuple):
+    radius_channel: Any = None
     radius_pipe_90_deg_bend: Any = None
     radius_pipe_180_deg_bend: Any = None
     a_bz_liq: Any = None
     b_bz_liq: Any = None
-    roughness_fw_channel: Any = None
-    ip: Any = None
+    roughness_channel: Any = None
     i_ps: Any = None
-    num_90: Any = None
-    num_180: Any = None
-    l_pipe: Any = None
-    den: Any = None
-    vsc: Any = None
-    vv: Any = None
+    n_pipe_90_deg_bends: Any = None
+    n_pipe_180_deg_bends: Any = None
+    len_pipe: Any = None
+    den_coolant: Any = None
+    visc_coolant: Any = None
+    vel_coolant: Any = None
     label: Any = None
     expected_pressure_drop_out: Any = None
 
 
 @pytest.mark.parametrize(
-    "pressuredropparam",
+    "coolantfrictionlossparam",
     [
-        PressureDropParam(
-            radius_fw_channel=0.0060000000000000001,
+        CoolantFrictionLossParam(
+            radius_channel=0.0060000000000000001,
             radius_pipe_90_deg_bend=0.018,
             radius_pipe_180_deg_bend=0.09,
             a_bz_liq=0.20000000000000001,
             b_bz_liq=0.20000000000000001,
-            roughness_fw_channel=9.9999999999999995e-07,
-            ip=0,
+            roughness_channel=9.9999999999999995e-07,
             i_ps=1,
-            num_90=2,
-            num_180=0,
-            l_pipe=4,
-            den=10.405276820718059,
-            vsc=3.604452999475736e-05,
-            vv=32.753134225223164,
+            n_pipe_90_deg_bends=2,
+            n_pipe_180_deg_bends=0,
+            len_pipe=4,
+            den_coolant=10.405276820718059,
+            visc_coolant=3.604452999475736e-05,
+            vel_coolant=32.753134225223164,
             label="Inboard first wall",
             expected_pressure_drop_out=36213.58989742931,
         ),
-        PressureDropParam(
-            radius_fw_channel=1.0,
+        CoolantFrictionLossParam(
+            radius_channel=1.0,
             radius_pipe_90_deg_bend=1.0,
             radius_pipe_180_deg_bend=1.0,
             a_bz_liq=1.0,
             b_bz_liq=1.0,
-            roughness_fw_channel=1e-6,
-            ip=0,
+            roughness_channel=1e-6,
             i_ps=2,
-            num_90=1.0,
-            num_180=1.0,
-            l_pipe=1.0,
-            den=1.0,
-            vsc=1.0,
-            vv=1.0,
+            n_pipe_90_deg_bends=1.0,
+            n_pipe_180_deg_bends=1.0,
+            len_pipe=1.0,
+            den_coolant=1.0,
+            visc_coolant=1.0,
+            vel_coolant=1.0,
             label="label",
             expected_pressure_drop_out=1.4325633520224854,
         ),
     ],
 )
-def test_pressure_drop(pressuredropparam, monkeypatch, blanket_library):
+def test_coolant_friction_loss(coolantfrictionlossparam, monkeypatch, blanket_library):
     """
     Automatically generated Unit Test for pressure_drop.
 
     This test was generated using data from
     blanket_files/large_tokamak_primary_pumping2.IN.DAT.
 
-    :param pressuredropparam: the data used to mock and assert in this test.
-    :type pressuredropparam: pressuredropparam
+    Parameters
+    ----------
+    coolantfrictionlossparam : CoolantFrictionLossParam
+        the data used to mock and assert in this test.
+    monkeypatch : _pytest.monkeypatch.monkeypatch
+        pytest fixture used to mock module/class variables
+    blanket_library : BlanketLibrary
+        the blanket library instance used in this test.
 
-    :param monkeypatch: pytest fixture used to mock module/class variables
-    :type monkeypatch: _pytest.monkeypatch.monkeypatch
     """
+
     monkeypatch.setattr(
-        blanket_library.data.fwbs,
-        "radius_fw_channel",
-        pressuredropparam.radius_fw_channel,
-    )
-    monkeypatch.setattr(
-        blanket_library.data.fwbs, "a_bz_liq", pressuredropparam.a_bz_liq
-    )
-    monkeypatch.setattr(
-        blanket_library.data.fwbs, "b_bz_liq", pressuredropparam.b_bz_liq
+        blanket_library.data.fwbs, "a_bz_liq", coolantfrictionlossparam.a_bz_liq
     )
     monkeypatch.setattr(
-        blanket_library.data.fwbs,
-        "roughness_fw_channel",
-        pressuredropparam.roughness_fw_channel,
+        blanket_library.data.fwbs, "b_bz_liq", coolantfrictionlossparam.b_bz_liq
     )
 
-    pressure_params = blanket_library.coolant_friction_pressure_drop(
-        i_ps=pressuredropparam.i_ps,
-        radius_pipe_90_deg_bend=pressuredropparam.radius_pipe_90_deg_bend,
-        radius_pipe_180_deg_bend=pressuredropparam.radius_pipe_180_deg_bend,
-        n_pipe_90_deg_bends=pressuredropparam.num_90,
-        n_pipe_180_deg_bends=pressuredropparam.num_180,
-        len_pipe=pressuredropparam.l_pipe,
-        den_coolant=pressuredropparam.den,
-        visc_coolant=pressuredropparam.vsc,
-        vel_coolant=pressuredropparam.vv,
+    pressure_params: CoolantFrictionLossParameters = (
+        blanket_library.coolant_friction_pressure_drop(
+            i_ps=coolantfrictionlossparam.i_ps,
+            radius_pipe_90_deg_bend=(coolantfrictionlossparam.radius_pipe_90_deg_bend),
+            radius_pipe_180_deg_bend=(coolantfrictionlossparam.radius_pipe_180_deg_bend),
+            n_pipe_90_deg_bends=coolantfrictionlossparam.n_pipe_90_deg_bends,
+            n_pipe_180_deg_bends=coolantfrictionlossparam.n_pipe_180_deg_bends,
+            len_pipe=coolantfrictionlossparam.len_pipe,
+            den_coolant=coolantfrictionlossparam.den_coolant,
+            visc_coolant=coolantfrictionlossparam.visc_coolant,
+            vel_coolant=coolantfrictionlossparam.vel_coolant,
+            roughness_channel=coolantfrictionlossparam.roughness_channel,
+            radius_channel=coolantfrictionlossparam.radius_channel,
+        )
     )
 
     assert pressure_params.dpres_total == pytest.approx(
-        pressuredropparam.expected_pressure_drop_out
+        coolantfrictionlossparam.expected_pressure_drop_out
     )
 
 

From 53ceec13122b93c34e701ee0c8a647f268d83da7 Mon Sep 17 00:00:00 2001
From: chris-ashe <christopher.ashe@ukaea.uk>
Date: Sun, 7 Jun 2026 19:30:26 +0100
Subject: [PATCH 13/33] Enhance inboard blanket coolant channel output and
 pressure drop calculations

---
 process/core/io/plot/summary.py            |  47 ++++++-
 process/models/blankets/blanket_library.py | 151 ++++++++++++++++++++-
 2 files changed, 188 insertions(+), 10 deletions(-)

diff --git a/process/core/io/plot/summary.py b/process/core/io/plot/summary.py
index e7ab380956..5603cc5415 100644
--- a/process/core/io/plot/summary.py
+++ b/process/core/io/plot/summary.py
@@ -16818,10 +16818,10 @@ def plot_blanket_coolant_channel_structure_and_properties(
         f"Radius of blanket channel: {m_file.get('radius_blkt_channel', scan=scan):.4f} m\n"
         f"Channel roughness ($\\epsilon$): {m_file.get('roughness_fw_channel', scan=scan):.4e} m\n\n"
         f"Radial coolant channel length: {m_file.get('len_blkt_outboard_coolant_channel_radial', scan=scan):.4f} m\n"
-        f"Toroidal coolant channel length: {m_file.get('len_blkt_inboard_segment_toroidal', scan=scan):.4f} m\n"
-        f"Number of radial channels: {m_file.get('n_blkt_inboard_module_coolant_sections_radial', scan=scan)}\n"
-        f"Number of poloidal channels: {m_file.get('n_blkt_inboard_module_coolant_sections_poloidal', scan=scan)}\n"
-        f"Total length of coolant channel straight sections: {m_file.get('len_blkt_inboard_channel_total', scan=scan):.4f} m\n\n"
+        f"Poloidal coolant channel length: {m_file.get('len_blkt_outboard_segment_poloidal', scan=scan):.4f} m\n"
+        f"Number of radial channels: {m_file.get('n_blkt_outboard_module_coolant_sections_radial', scan=scan)}\n"
+        f"Number of poloidal channels: {m_file.get('n_blkt_outboard_module_coolant_sections_poloidal', scan=scan)}\n"
+        f"Total length of coolant channel straight sections: {m_file.get('len_blkt_outboard_channel_total', scan=scan):.4f} m\n\n"
         f"Pressure drop for straight sections: {m_file.get('dpres_blkt_outboard_coolant_channel_straight_total', scan=scan):.2e} Pa\n"
         f"Pressure drop for 90° bends: {m_file.get('dpres_blkt_outboard_coolant_channel_90_bend', scan=scan):.2e} Pa\n"
         f"Total pressure drop for 90° bends: {m_file.get('dpres_blkt_outboard_coolant_channel_90_bends_total', scan=scan):.2e} Pa\n"
@@ -16851,6 +16851,45 @@ def plot_blanket_coolant_channel_structure_and_properties(
         },
     )
 
+    # Add info about the Winding Pack
+    textstr_inboard_blkt = (
+        f"$\\mathbf{{Inboard \\ blanket:}}$\n \n"
+        f"Radius of blanket channel: {m_file.get('radius_blkt_channel', scan=scan):.4f} m\n"
+        f"Channel roughness ($\\epsilon$): {m_file.get('roughness_fw_channel', scan=scan):.4e} m\n\n"
+        f"Radial coolant channel length: {m_file.get('len_blkt_inboard_coolant_channel_radial', scan=scan):.4f} m\n"
+        f"Poloidal coolant channel length: {m_file.get('len_blkt_inboard_segment_poloidal', scan=scan):.4f} m\n"
+        f"Number of radial channels: {m_file.get('n_blkt_inboard_module_coolant_sections_radial', scan=scan)}\n"
+        f"Number of poloidal channels: {m_file.get('n_blkt_inboard_module_coolant_sections_poloidal', scan=scan)}\n"
+        f"Total length of coolant channel straight sections: {m_file.get('len_blkt_inboard_channel_total', scan=scan):.4f} m\n\n"
+        f"Pressure drop for straight sections: {m_file.get('dpres_blkt_inboard_coolant_channel_straight_total', scan=scan):.2e} Pa\n"
+        f"Pressure drop for 90° bends: {m_file.get('dpres_blkt_inboard_coolant_channel_90_bend', scan=scan):.2e} Pa\n"
+        f"Total pressure drop for 90° bends: {m_file.get('dpres_blkt_inboard_coolant_channel_90_bends_total', scan=scan):.2e} Pa\n"
+        f"Pressure drop for 180° bends: {m_file.get('dpres_blkt_inboard_coolant_channel_180_bend', scan=scan):.2e} Pa\n"
+        f"Total pressure drop for 180° bends: {m_file.get('dpres_blkt_inboard_coolant_channel_180_bends_total', scan=scan):.2e} Pa\n"
+        f"Total pressure drop for all bends: {m_file.get('dpres_blkt_inboard_bends_total', scan=scan):.2e} Pa\n\n"
+        f"Reynolds number ($Re$): {m_file.get('reynolds_blkt_inboard_coolant', scan=scan):.4f}\n"
+        f"Darcy Friction factor ($f$): {m_file.get('darcy_frict_blkt_inboard_coolant', scan=scan):.4f}\n\n"
+        f"Friction drop coefficient for straight sections: {m_file.get('f_straight_blkt_inboard_coolant', scan=scan):.4f}\n"
+        f"Friction drop coefficient for 90° bends: {m_file.get('f_elbow_blkt_inboard_90_bend', scan=scan):.4f}\n"
+        f"Friction drop coefficient for 180° bends: {m_file.get('f_elbow_blkt_inboard_180_bend', scan=scan):.4f}\n"
+    )
+
+    fig.text(
+        0.2,
+        0.65,
+        textstr_inboard_blkt,
+        fontsize=9,
+        verticalalignment="top",
+        horizontalalignment="left",
+        transform=fig.transFigure,
+        bbox={
+            "boxstyle": "round",
+            "facecolor": "wheat",
+            "alpha": 1.0,
+            "linewidth": 2,
+        },
+    )
+
 
 def main_plot(
     m_file: MFile,
diff --git a/process/models/blankets/blanket_library.py b/process/models/blankets/blanket_library.py
index 345fb09a38..2fa34609fe 100644
--- a/process/models/blankets/blanket_library.py
+++ b/process/models/blankets/blanket_library.py
@@ -1569,6 +1569,44 @@ def thermo_hydraulic_model_pressure_drop_calculations(self, output: bool):
                 )
             )
 
+        self.data.blanket.dpres_blkt_inboard_coolant_channel_straight_total = (
+            blkt_inboard_friction_params.dpres_straight
+        )
+        self.data.blanket.dpres_blkt_inboard_coolant_channel_90_bend = (
+            blkt_inboard_friction_params.dpres_90
+        )
+        self.data.blanket.dpres_blkt_inboard_coolant_channel_90_bends_total = (
+            blkt_inboard_friction_params.dpres_90_total
+        )
+        self.data.blanket.dpres_blkt_inboard_coolant_channel_180_bend = (
+            blkt_inboard_friction_params.dpres_180
+        )
+        self.data.blanket.dpres_blkt_inboard_coolant_channel_180_bends_total = (
+            blkt_inboard_friction_params.dpres_180_total
+        )
+        self.data.blanket.dpres_blkt_inboard_bends_total = (
+            blkt_inboard_friction_params.dpres_bends_total
+        )
+
+        self.data.blanket.reynolds_blkt_inboard_coolant = (
+            blkt_inboard_friction_params.reynolds_number
+        )
+        self.data.blanket.darcy_frict_blkt_inboard_coolant = (
+            blkt_inboard_friction_params.darcy_friction_factor
+        )
+        self.data.blanket.f_straight_blkt_inboard_coolant = (
+            blkt_inboard_friction_params.f_straight
+        )
+        self.data.blanket.len_blkt_inboard_coolant_channel_straight_total = (
+            blkt_inboard_friction_params.len_straight
+        )
+        self.data.blanket.f_elbow_blkt_inboard_90_bend = (
+            blkt_inboard_friction_params.f_elbow_90
+        )
+        self.data.blanket.f_elbow_blkt_inboard_180_bend = (
+            blkt_inboard_friction_params.f_elbow_180
+        )
+
         # If the blanket has a liquid metal breeder...
         if self.data.fwbs.i_blkt_dual_coolant > 0:
             deltap_blo_liq, _ = self.total_pressure_drop(
@@ -3607,11 +3645,12 @@ def output_blkt_pumping_variables(self):
         )
         po.ovarre(
             self.outfile,
-            "Inboard blanket coolant channel length (toroidal direction) (m)",
-            "(len_blkt_inboard_segment_toroidal)",
-            self.data.blanket.len_blkt_inboard_segment_toroidal,
+            "Inboard blanket coolant channel length (poloidal direction) (m)",
+            "(len_blkt_inboard_segment_poloidal)",
+            self.data.blanket.len_blkt_inboard_segment_poloidal,
             "OP ",
         )
+        po.oblnkl(self.outfile)
         po.ovarre(
             self.outfile,
             "Number of inboard blanket coolant sections in the radial direction",
@@ -3626,6 +3665,7 @@ def output_blkt_pumping_variables(self):
             self.data.fwbs.n_blkt_inboard_module_coolant_sections_poloidal,
             "OP ",
         )
+        po.oblnkl(self.outfile)
         po.ovarre(
             self.outfile,
             "Total length of inboard blanket coolant channel straight sections (m)",
@@ -3633,6 +3673,105 @@ def output_blkt_pumping_variables(self):
             self.data.blanket.len_blkt_inboard_channel_total,
             "OP ",
         )
+        po.oblnkl(self.outfile)
+        po.ocmmnt(self.outfile, "----------------------------")
+
+        po.ovarre(
+            self.outfile,
+            "Pressure drop for straight sections of inboard blanket (Pa)",
+            "(dpres_blkt_inboard_coolant_channel_straight_total)",
+            self.data.blanket.dpres_blkt_inboard_coolant_channel_straight_total,
+            "OP ",
+        )
+        po.oblnkl(self.outfile)
+        po.ovarre(
+            self.outfile,
+            "Pressure drop for 90° bends of inboard blanket (Pa)",
+            "(dpres_blkt_inboard_coolant_channel_90_bend)",
+            self.data.blanket.dpres_blkt_inboard_coolant_channel_90_bend,
+            "OP ",
+        )
+        po.ovarre(
+            self.outfile,
+            "Total pressure drop for 90° bends of inboard blanket (Pa)",
+            "(dpres_blkt_inboard_coolant_channel_90_bends_total)",
+            self.data.blanket.dpres_blkt_inboard_coolant_channel_90_bends_total,
+            "OP ",
+        )
+        po.oblnkl(self.outfile)
+        po.ovarre(
+            self.outfile,
+            "Pressure drop for 180° bends of inboard blanket (Pa)",
+            "(dpres_blkt_inboard_coolant_channel_180_bend)",
+            self.data.blanket.dpres_blkt_inboard_coolant_channel_180_bend,
+            "OP ",
+        )
+        po.ovarre(
+            self.outfile,
+            "Total pressure drop for 180° bends of inboard blanket (Pa)",
+            "(dpres_blkt_inboard_coolant_channel_180_bends_total)",
+            self.data.blanket.dpres_blkt_inboard_coolant_channel_180_bends_total,
+            "OP ",
+        )
+
+        po.oblnkl(self.outfile)
+        po.ovarre(
+            self.outfile,
+            "Total pressure drop for all bends (Pa)",
+            "(dpres_blkt_inboard_bends_total)",
+            self.data.blanket.dpres_blkt_inboard_bends_total,
+            "OP ",
+        )
+
+        po.oblnkl(self.outfile)
+        po.ovarre(
+            self.outfile,
+            "Reynolds number of inboard blanket coolant",
+            "(reynolds_blkt_inboard_coolant)",
+            self.data.blanket.reynolds_blkt_inboard_coolant,
+            "OP ",
+        )
+
+        po.ovarre(
+            self.outfile,
+            "Darcy friction factor of inboard blanket coolant",
+            "(darcy_frict_blkt_inboard_coolant)",
+            self.data.blanket.darcy_frict_blkt_inboard_coolant,
+            "OP ",
+        )
+        po.oblnkl(self.outfile)
+
+        po.ovarre(
+            self.outfile,
+            "Pressure drop coefficient for straight sections of inboard blanket",
+            "(f_straight_blkt_inboard_coolant)",
+            self.data.blanket.f_straight_blkt_inboard_coolant,
+            "OP ",
+        )
+
+        po.ovarre(
+            self.outfile,
+            "Total length of straight sections of inboard blanket coolant channels (m)",
+            "(len_blkt_inboard_coolant_channel_straight_total)",
+            self.data.blanket.len_blkt_inboard_coolant_channel_straight_total,
+            "OP ",
+        )
+
+        po.ovarre(
+            self.outfile,
+            "Pressure drop coefficient for 90° bends in inboard blanket",
+            "(f_elbow_blkt_inboard_90_bend)",
+            self.data.blanket.f_elbow_blkt_inboard_90_bend,
+            "OP ",
+        )
+
+        po.ovarre(
+            self.outfile,
+            "Pressure drop coefficient for 180° bends in inboard blanket",
+            "(f_elbow_blkt_inboard_180_bend)",
+            self.data.blanket.f_elbow_blkt_inboard_180_bend,
+            "OP ",
+        )
 
         po.osubhd(self.outfile, "Outboard Blanket")
 
@@ -3645,9 +3784,9 @@ def output_blkt_pumping_variables(self):
         )
         po.ovarre(
             self.outfile,
-            "Outboard blanket coolant channel length (toroidal direction) (m)",
-            "(len_blkt_outboard_segment_toroidal)",
-            self.data.blanket.len_blkt_outboard_segment_toroidal,
+            "Outboard blanket coolant channel length (poloidal direction) (m)",
+            "(len_blkt_outboard_segment_poloidal)",
+            self.data.blanket.len_blkt_outboard_segment_poloidal,
             "OP ",
         )
         po.oblnkl(self.outfile)

From 5966913422a8ccbb4c70594a28ba75d7f3b3140b Mon Sep 17 00:00:00 2001
From: mn3981 <christopher.ashe@ukaea.uk>
Date: Mon, 8 Jun 2026 10:28:12 +0100
Subject: [PATCH 14/33] Move FW number of bends to FW file

---
 process/models/blankets/blanket_library.py | 7 +------
 process/models/fw.py                       | 6 ++++++
 2 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/process/models/blankets/blanket_library.py b/process/models/blankets/blanket_library.py
index 2fa34609fe..11cd81119c 100644
--- a/process/models/blankets/blanket_library.py
+++ b/process/models/blankets/blanket_library.py
@@ -28,6 +28,7 @@
     darcy_friction_haaland,
     elbow_coeff,
 )
+from process.models.fw import N_FW_PIPE_90_DEG_BENDS, N_FW_PIPE_180_DEG_BENDS
 from process.models.power import PumpingPowerModelTypes
 
 logger = logging.getLogger(__name__)
@@ -1143,12 +1144,6 @@ def thermo_hydraulic_model_pressure_drop_calculations(self, output: bool):
 
         # Coolant channel bends
 
-        # Number of angle turns in FW and blanket flow channels, n.b. these are the
-        # same for CCFE HCPB and KIT DCLL. FW is also be the same for DCLL MMS ans SMS.
-
-        N_FW_PIPE_90_DEG_BENDS = 2
-        N_FW_PIPE_180_DEG_BENDS = 0
-
         # N.B. This is for BZ only, does not include MF/BSS.
         if self.data.fwbs.i_blkt_dual_coolant in {1, 2}:
             N_BLKT_PIPE_90_DEG_BENDS = 4
diff --git a/process/models/fw.py b/process/models/fw.py
index 733c75fb38..917e17b21b 100644
--- a/process/models/fw.py
+++ b/process/models/fw.py
@@ -24,6 +24,12 @@
 logger = logging.getLogger(__name__)
 
 
+N_FW_PIPE_90_DEG_BENDS = 2
+"Number of 90 degree bends in first wall coolant channels."
+N_FW_PIPE_180_DEG_BENDS = 0
+"Number of 180 degree bends in first wall coolant channels."
+
+
 class FirstWall(Model):
     """Calculate the first wall parameters"""
 

From 9bdc0287408d626ea045f3532fb8f2d0c74a51f7 Mon Sep 17 00:00:00 2001
From: mn3981 <christopher.ashe@ukaea.uk>
Date: Mon, 8 Jun 2026 10:54:17 +0100
Subject: [PATCH 15/33] Remove pipe plotting

---
 process/core/io/plot/summary.py | 1 -
 1 file changed, 1 deletion(-)

diff --git a/process/core/io/plot/summary.py b/process/core/io/plot/summary.py
index 5603cc5415..6a1a0e36fe 100644
--- a/process/core/io/plot/summary.py
+++ b/process/core/io/plot/summary.py
@@ -17514,7 +17514,6 @@ def _add_page(name: str | None = None):
     plot_blkt_structure(ax_blanket, figs[34], m_file, scan, radial_build, colour_scheme)
 
     plot_blkt_pipe_bends(figs[35], m_file, scan)
-    plot_blanket_coolant_channel_structure(figs[35].add_subplot(111), m_file, scan)
     plot_blanket_coolant_channel_structure_and_properties(figs[35], m_file, scan)
 
     plot_main_power_flow(

From a72f44e7c74d4c98e710912f6681db6589f7bc65 Mon Sep 17 00:00:00 2001
From: mn3981 <christopher.ashe@ukaea.uk>
Date: Mon, 8 Jun 2026 11:14:21 +0100
Subject: [PATCH 16/33] Update summary positions of tables

---
 process/core/io/plot/summary.py            |  8 +++---
 process/models/blankets/blanket_library.py | 30 ++++++++++------------
 2 files changed, 17 insertions(+), 21 deletions(-)

diff --git a/process/core/io/plot/summary.py b/process/core/io/plot/summary.py
index 6a1a0e36fe..b52f038b90 100644
--- a/process/core/io/plot/summary.py
+++ b/process/core/io/plot/summary.py
@@ -16837,7 +16837,7 @@ def plot_blanket_coolant_channel_structure_and_properties(
 
     fig.text(
         0.5,
-        0.65,
+        0.5,
         textstr_outboard_blkt,
         fontsize=9,
         verticalalignment="top",
@@ -16875,8 +16875,8 @@ def plot_blanket_coolant_channel_structure_and_properties(
     )
 
     fig.text(
-        0.2,
-        0.65,
+        0.1,
+        0.5,
         textstr_inboard_blkt,
         fontsize=9,
         verticalalignment="top",
@@ -17525,8 +17525,6 @@ def _add_page(name: str | None = None):
     ax24.set_position([0.08, 0.35, 0.84, 0.57])
     plot_system_power_profiles_over_time(ax24, m_file, scan, figs[37])
 
-    # plot_outboard_blanket_coolant_properties(figs[37], m_file, scan)
-
 
 def create_thickness_builds(m_file, scan: int):
     """Create the dictionaries of radial and vertical build values and cumulative values"""
diff --git a/process/models/blankets/blanket_library.py b/process/models/blankets/blanket_library.py
index 11cd81119c..4ab6c8e364 100644
--- a/process/models/blankets/blanket_library.py
+++ b/process/models/blankets/blanket_library.py
@@ -1438,7 +1438,7 @@ def thermo_hydraulic_model_pressure_drop_calculations(self, output: bool):
             b_bz_liq=self.data.fwbs.b_bz_liq,
         )
 
-        dpres_fw_inboard_coolant, fw_inboard_friction_params = self.total_pressure_drop(
+        dpres_fw_inboard_coolant, _ = self.total_pressure_drop(
             output,
             icoolpump=1,
             vel_coolant=vel_fw_inboard_coolant,
@@ -1453,21 +1453,19 @@ def thermo_hydraulic_model_pressure_drop_calculations(self, output: bool):
             label="Inboard first wall",
         )
 
-        dpres_fw_outboard_coolant, fw_outboard_friction_params = (
-            self.total_pressure_drop(
-                output,
-                icoolpump=1,
-                vel_coolant=vel_fw_outboard_coolant,
-                len_pipe=self.data.fwbs.len_fw_channel,
-                n_pipe_90_deg_bends=N_FW_PIPE_90_DEG_BENDS,
-                n_pipe_180_deg_bends=N_FW_PIPE_180_DEG_BENDS,
-                den_coolant=self.data.fwbs.den_fw_coolant,
-                visc_coolant_dynamic=self.data.fwbs.visc_fw_coolant,
-                coolant_electrical_conductivity=0.0e0,
-                pol_channel_length=pollengo,
-                nopolchan=npoltoto,
-                label="Outboard first wall",
-            )
+        dpres_fw_outboard_coolant, _ = self.total_pressure_drop(
+            output,
+            icoolpump=1,
+            vel_coolant=vel_fw_outboard_coolant,
+            len_pipe=self.data.fwbs.len_fw_channel,
+            n_pipe_90_deg_bends=N_FW_PIPE_90_DEG_BENDS,
+            n_pipe_180_deg_bends=N_FW_PIPE_180_DEG_BENDS,
+            den_coolant=self.data.fwbs.den_fw_coolant,
+            visc_coolant_dynamic=self.data.fwbs.visc_fw_coolant,
+            coolant_electrical_conductivity=0.0e0,
+            pol_channel_length=pollengo,
+            nopolchan=npoltoto,
+            label="Outboard first wall",
         )
 
         # BB Presure Drops ###############

From e3f576223bd6dddaa445495cd71a36e6ecc00888 Mon Sep 17 00:00:00 2001
From: mn3981 <christopher.ashe@ukaea.uk>
Date: Thu, 11 Jun 2026 15:23:04 +0100
Subject: [PATCH 17/33] Post rebase fixes

---
 process/models/blankets/blanket_library.py |  2 +-
 process/models/engineering/pumping.py      | 11 +++++------
 2 files changed, 6 insertions(+), 7 deletions(-)

diff --git a/process/models/blankets/blanket_library.py b/process/models/blankets/blanket_library.py
index 4ab6c8e364..92184ef051 100644
--- a/process/models/blankets/blanket_library.py
+++ b/process/models/blankets/blanket_library.py
@@ -21,8 +21,8 @@
     eshellvol,
 )
 from process.models.engineering.pumping import (
-    CoolantType,
     CoolantFrictionLossParameters,
+    CoolantType,
     calculate_required_mass_flow_rate,
     calculate_reynolds_number,
     darcy_friction_haaland,
diff --git a/process/models/engineering/pumping.py b/process/models/engineering/pumping.py
index 537b9b4d0b..2984d048c3 100644
--- a/process/models/engineering/pumping.py
+++ b/process/models/engineering/pumping.py
@@ -1,12 +1,16 @@
 """Engineering models for pumping system analysis."""
 
 import logging
+from dataclasses import dataclass
 from enum import IntEnum, unique
 from types import DynamicClassAttribute
-from dataclasses import dataclass
 
 import numpy as np
 
+from process.core.exceptions import ProcessValueError
+
+logger = logging.getLogger(__name__)
+
 
 @unique
 class CoolantType(IntEnum):
@@ -42,11 +46,6 @@ def full_name(self):
         return self._full_name_
 
 
-from process.core.exceptions import ProcessValueError
-
-logger = logging.getLogger(__name__)
-
-
 @dataclass
 class CoolantFrictionLossParameters:
     """Parameters for calculating coolant friction losses."""

From 622b95720d4e770a32b965ffe44b7c7ff4406222 Mon Sep 17 00:00:00 2001
From: mn3981 <christopher.ashe@ukaea.uk>
Date: Tue, 23 Jun 2026 16:48:11 +0100
Subject: [PATCH 18/33] Remove unused CoolProp imports and related plotting
 functions for outboard blanket coolant properties

---
 process/core/io/plot/summary.py | 112 +-------------------------------
 1 file changed, 2 insertions(+), 110 deletions(-)

diff --git a/process/core/io/plot/summary.py b/process/core/io/plot/summary.py
index b52f038b90..df905388c9 100644
--- a/process/core/io/plot/summary.py
+++ b/process/core/io/plot/summary.py
@@ -7,14 +7,11 @@
 from pathlib import Path
 from typing import Any, Literal
 
-import CoolProp
 import matplotlib as mpl
 import matplotlib.backends.backend_pdf as bpdf
 import matplotlib.image as mpimg
 import matplotlib.pyplot as plt
 import numpy as np
-from CoolProp.CoolProp import PropsSI
-from CoolProp.Plots import PropertyPlot
 from matplotlib import patches
 from matplotlib.patches import Circle, Rectangle
 from matplotlib.path import Path as mplPath
@@ -16349,19 +16346,11 @@ def plot_blanket_coolant_channel_structure(self, m_file: MFile, scan: int):
     )
     n_blkt_outboard_module_coolant_sections_radial = max(
         1,
-        int(
-            round(
-                m_file.get("n_blkt_outboard_module_coolant_sections_radial", scan=scan)
-            )
-        ),
+        round(m_file.get("n_blkt_outboard_module_coolant_sections_radial", scan=scan)),
     )
     n_blkt_outboard_module_coolant_sections_poloidal = max(
         1,
-        int(
-            round(
-                m_file.get("n_blkt_outboard_module_coolant_sections_poloidal", scan=scan)
-            )
-        ),
+        round(m_file.get("n_blkt_outboard_module_coolant_sections_poloidal", scan=scan)),
     )
     elbow_radius_180 = max(
         float(m_file.get("radius_blkt_channel_180_bend", scan=scan)), 1e-6
@@ -16711,103 +16700,6 @@ def plot_pf_dimensions(
     axis.set_aspect("equal", adjustable="box")
 
 
-def plot_outboard_blanket_coolant_properties(fig: plt.Figure, m_file: MFile, scan: int):
-    """Plots the properties of the outboard blanket coolant along the poloidal direction."""
-    temp_blkt_coolant_in = float(m_file.get("temp_blkt_coolant_in", scan=scan))
-    temp_blkt_coolant_out = float(m_file.get("temp_blkt_coolant_out", scan=scan))
-    pres_blkt_coolant = float(m_file.get("pres_blkt_coolant", scan=scan))
-    dens_blkt_coolant_in = PropsSI(
-        "Dmass", "T", temp_blkt_coolant_in, "P", pres_blkt_coolant, "Helium"
-    )
-    dens_blkt_coolant_out = PropsSI(
-        "Dmass", "T", temp_blkt_coolant_out, "P", pres_blkt_coolant, "Helium"
-    )
-
-    fig.clear()
-    axes = fig.subplots(2, 2)
-
-    axis = axes[0, 0]
-
-    plot = PropertyPlot("Helium", "PH", axis=axis, unit_system="SI")
-
-    # #axis.set_xscale('log')
-    axis.set_ylim(((pres_blkt_coolant) * 0.9), (pres_blkt_coolant) * 1.5)
-    # plot.set_axis_limits([None, None, (pres_blkt_coolant/1e3)*0.9, (pres_blkt_coolant/1e3)*1.1])
-
-    plot.calc_isolines(CoolProp.iT)  # Temperature
-    plot.calc_isolines(CoolProp.iSmass)  # Entropy
-    plot.calc_isolines(CoolProp.iDmass)  # Density
-    # plot.axis.relim()
-    # plot.axis.autoscale_view()
-    plot.draw()
-
-    axis.set_title("Pressure-enthalpy plot")
-
-    axis = axes[0, 1]
-    plot = PropertyPlot("Helium", "TD", axis=axis, unit_system="SI")
-
-    density_min = min(dens_blkt_coolant_in, dens_blkt_coolant_out)
-    density_max = max(dens_blkt_coolant_in, dens_blkt_coolant_out)
-    temperature_min = min(temp_blkt_coolant_in, temp_blkt_coolant_out)
-    temperature_max = max(temp_blkt_coolant_in, temp_blkt_coolant_out)
-
-    density_margin = max((density_max - density_min) * 0.2, max(density_max, 1.0) * 0.05)
-    temperature_margin = max(
-        (temperature_max - temperature_min) * 0.2,
-        max(temperature_max, 1.0) * 0.05,
-    )
-
-    axis.set_xlim(density_min - density_margin, density_max + density_margin)
-    axis.set_ylim(
-        temperature_min - temperature_margin, temperature_max + temperature_margin
-    )
-
-    plot.calc_isolines(CoolProp.iP)  # Pressure
-    plot.calc_isolines(CoolProp.iHmass)  # Enthalpy
-    plot.draw()
-
-    axis.plot(
-        [dens_blkt_coolant_in, dens_blkt_coolant_out],
-        [temp_blkt_coolant_in, temp_blkt_coolant_out],
-        color="C3",
-        marker="o",
-        linewidth=1.5,
-        label="Coolant path",
-    )
-    axis.legend(fontsize=8, loc="best")
-    axis.set_title("Temperature-density plot")
-
-    axis = axes[1, 0]
-    plot = PropertyPlot("Helium", "PD", axis=axis, unit_system="SI")
-
-    pressure_margin = max(pres_blkt_coolant * 0.1, 1.0)
-
-    axis.set_xlim(density_min - density_margin, density_max + density_margin)
-    axis.set_ylim(
-        pres_blkt_coolant - pressure_margin, pres_blkt_coolant + pressure_margin
-    )
-
-    plot.calc_isolines(CoolProp.iT)  # Temperature
-    plot.calc_isolines(CoolProp.iHmass)  # Enthalpy
-    plot.draw()
-
-    axis.plot(
-        [dens_blkt_coolant_in, dens_blkt_coolant_out],
-        [pres_blkt_coolant, pres_blkt_coolant],
-        color="C3",
-        marker="o",
-        linewidth=1.5,
-        label="Coolant path",
-    )
-    axis.legend(fontsize=8, loc="best")
-    axis.set_title("Pressure-density plot")
-
-    axes[1, 1].axis("off")
-
-    fig.tight_layout()
-    
-
-
 def plot_blanket_coolant_channel_structure_and_properties(
     fig: plt.Figure, m_file: MFile, scan: int
 ):

From 02f1a1fe77618a4c266bc1ed8424f1f77edce990 Mon Sep 17 00:00:00 2001
From: mn3981 <christopher.ashe@ukaea.uk>
Date: Thu, 2 Jul 2026 14:16:31 +0100
Subject: [PATCH 19/33] Post merge coflict fixes

---
 process/core/io/plot/summary.py | 237 ++------------------------------
 1 file changed, 8 insertions(+), 229 deletions(-)

diff --git a/process/core/io/plot/summary.py b/process/core/io/plot/summary.py
index df905388c9..3ac029fb52 100644
--- a/process/core/io/plot/summary.py
+++ b/process/core/io/plot/summary.py
@@ -16336,231 +16336,6 @@ def plot_cs_von_mises_2d_contour(
     axis.legend(loc="best")
 
 
-def plot_blanket_coolant_channel_structure(self, m_file: MFile, scan: int):
-    """Plot a schematic of the blanket coolant channel routing."""
-    len_blkt_outboard_coolant_channel_radial = float(
-        m_file.get("len_blkt_outboard_coolant_channel_radial", scan=scan)
-    )
-    len_blkt_outboard_segment_toroidal = float(
-        m_file.get("len_blkt_outboard_segment_toroidal", scan=scan)
-    )
-    n_blkt_outboard_module_coolant_sections_radial = max(
-        1,
-        round(m_file.get("n_blkt_outboard_module_coolant_sections_radial", scan=scan)),
-    )
-    n_blkt_outboard_module_coolant_sections_poloidal = max(
-        1,
-        round(m_file.get("n_blkt_outboard_module_coolant_sections_poloidal", scan=scan)),
-    )
-    elbow_radius_180 = max(
-        float(m_file.get("radius_blkt_channel_180_bend", scan=scan)), 1e-6
-    )
-    r = max(float(m_file.get("radius_blkt_channel", scan=scan)), 1e-6)
-    elbow_radius_90 = max(
-        float(m_file.get("radius_blkt_channel_90_bend", scan=scan)), 1e-6
-    )
-
-    axis = self if isinstance(self, Axes) else getattr(self, "ax", None)
-    figure = axis.figure if isinstance(axis, Axes) else None
-
-    if not isinstance(axis, Axes):
-        figure, axis = plt.subplots(figsize=(10, 6))
-
-    def _plot_straight(
-        x0: float,
-        y0: float,
-        x1: float,
-        y1: float,
-        *,
-        label: str | None = None,
-        alpha: float = 1.0,
-    ):
-        axis.plot(
-            [x0, x1],
-            [y0, y1],
-            color="tab:blue",
-            linewidth=2.5,
-            solid_capstyle="round",
-            alpha=alpha,
-            label=label,
-        )
-
-    def _plot_bend(
-        centre_x: float,
-        centre_y: float,
-        radius: float,
-        theta_start: float,
-        theta_end: float,
-        *,
-        label: str | None = None,
-        alpha: float = 1.0,
-    ):
-        theta = np.linspace(theta_start, theta_end, 80)
-        axis.plot(
-            centre_x + radius * np.cos(theta),
-            centre_y + radius * np.sin(theta),
-            color="tab:orange",
-            linewidth=2.5,
-            solid_capstyle="round",
-            alpha=alpha,
-            label=label,
-        )
-
-    lane_pitch = 2.0 * elbow_radius_180
-    poloidal_section_length = max(4.0 * r, 1.5 * elbow_radius_90)
-
-    show_radial_label = True
-    show_poloidal_label = True
-    show_90_label = True
-
-    inlet_x = 0.0
-    x_left = elbow_radius_90
-    x_right = elbow_radius_90 + len_blkt_outboard_coolant_channel_radial
-    y_lower = 0.0
-    y_upper = y_lower + lane_pitch
-    y_inlet_lower = y_lower - elbow_radius_90 - poloidal_section_length
-    y_outlet_upper = y_upper + elbow_radius_90 + poloidal_section_length
-
-    _plot_straight(
-        inlet_x,
-        y_inlet_lower,
-        inlet_x,
-        y_lower - elbow_radius_90,
-        label="Straight poloidal section" if show_poloidal_label else None,
-    )
-    show_poloidal_label = False
-
-    _plot_bend(
-        elbow_radius_90,
-        y_lower - elbow_radius_90,
-        elbow_radius_90,
-        np.pi,
-        np.pi / 2.0,
-        label="90° bend" if show_90_label else None,
-    )
-    show_90_label = False
-
-    _plot_straight(
-        x_left,
-        y_lower,
-        x_right,
-        y_lower,
-        label="Straight radial section" if show_radial_label else None,
-    )
-    show_radial_label = False
-
-    _plot_bend(
-        x_right,
-        y_lower + elbow_radius_180,
-        elbow_radius_180,
-        -np.pi / 2.0,
-        np.pi / 2.0,
-        label="180° bend",
-    )
-
-    _plot_straight(
-        x_right,
-        y_upper,
-        x_left,
-        y_upper,
-        label="Straight radial section" if show_radial_label else None,
-    )
-
-    _plot_bend(
-        x_left,
-        y_upper + elbow_radius_90,
-        elbow_radius_90,
-        3.0 * np.pi / 2.0,
-        np.pi,
-        label="90° bend" if show_90_label else None,
-    )
-
-    _plot_straight(
-        inlet_x,
-        y_upper + elbow_radius_90,
-        inlet_x,
-        y_outlet_upper,
-        label="Straight poloidal section" if show_poloidal_label else None,
-    )
-
-    total_180_bends = 1
-    total_90_bends = 2
-    total_poloidal_sections = 2
-    length_per_90_bend = 0.5 * np.pi * elbow_radius_90
-    length_per_180_bend = np.pi * elbow_radius_180
-    length_per_poloidal_section = poloidal_section_length
-    total_radial_channel_length = (
-        n_blkt_outboard_module_coolant_sections_radial
-        * len_blkt_outboard_coolant_channel_radial
-    )
-    total_poloidal_length = total_poloidal_sections * length_per_poloidal_section
-    total_bend_length = (
-        total_90_bends * length_per_90_bend + total_180_bends * length_per_180_bend
-    )
-    total_channel_length = (
-        total_radial_channel_length + total_poloidal_length + total_bend_length
-    )
-    info = textwrap.dedent(
-        f"""
-        Representative continuous channel loop
-        Straight radial sections: {n_blkt_outboard_module_coolant_sections_radial}
-        Straight radial length per channel: {total_radial_channel_length:.2f} m
-        Straight poloidal sections per loop: {total_poloidal_sections}
-        Straight poloidal length: {length_per_poloidal_section:.2f} m each
-        90° bends per channel: {total_90_bends}
-        90° bend length: {length_per_90_bend:.2f} m each
-        180° bends per channel: {total_180_bends}
-        180° bend length: {length_per_180_bend:.2f} m each
-        Total poloidal length per channel: {total_poloidal_length:.2f} m
-        Total bend length per channel: {total_bend_length:.2f} m
-        Approx. total channel length: {total_channel_length:.2f} m
-        Poloidal sections per module: {n_blkt_outboard_module_coolant_sections_poloidal}
-        Toroidal span per segment: {len_blkt_outboard_segment_toroidal:.2f} m
-        Channel radius: {r:.3f} m
-        """
-    ).strip()
-
-    axis.text(
-        1.02,
-        0.98,
-        info,
-        transform=axis.transAxes,
-        va="top",
-        ha="left",
-        fontsize=8,
-        bbox={"boxstyle": "round", "facecolor": "white", "alpha": 0.9},
-    )
-
-    axis.text(
-        0.02,
-        0.02,
-        "Continuous loop schematic with a single 180° return bend",
-        transform=axis.transAxes,
-        fontsize=8,
-        color="dimgray",
-    )
-
-    axis.set_title("Blanket coolant channel structure")
-    axis.set_xlabel("Radial direction [m]")
-    axis.set_ylabel("Channel layout [schematic m]")
-    axis.set_aspect("equal", adjustable="box")
-    axis.grid(True, alpha=0.25)
-    axis.minorticks_on()
-    axis.legend(fontsize=8, loc="upper right")
-
-    x_margin = len_blkt_outboard_coolant_channel_radial * 0.1 + 2.0 * elbow_radius_90
-    axis.set_xlim(-x_margin, x_right + x_margin)
-    axis.set_ylim(
-        y_inlet_lower - r,
-        y_outlet_upper + r,
-    )
-
-    if figure is not None:
-        figure.tight_layout()
-
-    return axis
-
-
 def plot_pf_dimensions(
     axis: plt.Axes, mfile: MFile, scan: int, colour_scheme: Literal[1, 2] = 1
 ) -> None:
@@ -17402,11 +17177,15 @@ def _add_page(name: str | None = None):
     )
     plot_fw_90_deg_pipe_bend(pages["fw_td_cross_section"].add_subplot(337), m_file, scan)
 
-    ax_blanket = figs[34].add_subplot(122, aspect="equal")
-    plot_blkt_structure(ax_blanket, figs[34], m_file, scan, radial_build, colour_scheme)
+    ax_blanket = _add_page("blkt_structure").add_subplot(122, aspect="equal")
+    plot_blkt_structure(
+        ax_blanket, pages["blkt_structure"], m_file, scan, radial_build, colour_scheme
+    )
 
-    plot_blkt_pipe_bends(figs[35], m_file, scan)
-    plot_blanket_coolant_channel_structure_and_properties(figs[35], m_file, scan)
+    plot_blkt_pipe_bends(_add_page("blkt_cooling"), m_file, scan)
+    plot_blanket_coolant_channel_structure_and_properties(
+        pages["blkt_cooling"], m_file, scan
+    )
 
     plot_main_power_flow(
         figs[36].add_subplot(111, aspect="equal"), m_file, scan, figs[36]

From 775f6526a88f326f09a39265ecd032546a182329 Mon Sep 17 00:00:00 2001
From: mn3981 <christopher.ashe@ukaea.uk>
Date: Thu, 2 Jul 2026 14:39:35 +0100
Subject: [PATCH 20/33] Move all of the pumping related function from
 `BlanketLibrary` into the new generic Pumping class

---
 .../source/eng-models/blanket_overview.md     |  75 ----
 .../eng-models/generic_methods/pumping.md     |  75 ++++
 process/models/blankets/blanket_library.py    | 416 ++----------------
 process/models/blankets/dcll.py               |   7 +-
 process/models/blankets/hcpb.py               |  12 +-
 process/models/engineering/pumping.py         | 321 +++++++++++++-
 .../models/blankets/test_blanket_library.py   | 178 +-------
 tests/unit/models/engineering/test_pumping.py | 171 +++++++
 8 files changed, 624 insertions(+), 631 deletions(-)

diff --git a/documentation/source/eng-models/blanket_overview.md b/documentation/source/eng-models/blanket_overview.md
index fa0de10aa6..97bd9dc6dc 100644
--- a/documentation/source/eng-models/blanket_overview.md
+++ b/documentation/source/eng-models/blanket_overview.md
@@ -5,78 +5,3 @@
 
 --------------------
 
-### Coolant mechanical pumping power | `coolant_pumping_power()`
-
-To calculate the coolant pumping power we use the change in enthalpies of the coolant as it goes through the pump. 
-**We assume the pump is isentropic so the entropy change of the coolant is 0**. 
-
-The mechanical pumping power is defined as:
-
-$$
-P = \frac{\frac{\dot{m} \times \left(H_{\text{out}}-H_{\text{in}}\right)}{\eta}}{\left(1-fp\right)}
-$$
-
-where $\dot{m}$ is the coolant mass flow rate, $H$ is the coolant enthalpy, $\eta$ is the isentropic efficiency of the pump and $\gamma$ is the adiabatic index of the coolant.
-
-$$
-fp = \frac{T_{\text{pump,out}}\left(\frac{P_{\text{pump,out}}}{P_{\text{pump,in}}}\right)^{-\frac{\gamma -1}{\gamma}}}{\eta \left(T_{\text{pump,in}}-T_{\text{pump,out}}\right)}
-$$
-
-------------------
-
-### Coolant pressure drop | `coolant_friction_pressure_drop()`
-
-The pressure drop in the coolant is given by the [Darcy-Weisbach Equation](https://en.wikipedia.org/wiki/Darcy%E2%80%93Weisbach_equation)
-
-For a cylindrical pipe of uniform diameter the pressure loss due to viscous effects can be characterized by:
-
-$$
-\Delta P = L\left[f_{\text{D}}\frac{\rho}{2}\frac{\langle v \rangle^2}{D_{\text{H}}}\right]
-$$
-
-where $L$ is the pipe length, $f_{\text{D}}$ is the [Darcy friction factor](https://en.wikipedia.org/wiki/Darcy_friction_factor_formulae), $\rho$ is the coolant density, $\langle v \rangle$ is the mean flow coolant velocity and $D_{\text{H}}$ is the hydraulic diameter or the pipe diameter in this case.
-
-To find the Darcy friction factor we need to know the Reynolds number given by:
-
-$$
-\text{Re} = \frac{\rho v L}{\mu}
-$$
-
-here $L$ is the characteristic length which we set to be the pipe diameter and $\mu$ is the coolant dynamic viscosity.
-
-Using the Reynolds number we calculate the Darcy friction factor using the Haaland approximation calculated by [`darcy_friction_haaland()`](../eng-models/generic_methods/pumping.md#pumping-coolant-friction--darcy_friction_haaland).
-
-For the radius of the pipe bend we assume it to be 3 times the radius of the coolant channel.
-
-The elbow coefficients for the 90 and 180 degree bends $\left(f_{\text{90,elbow}}, f_{\text{180,elbow}}\right)$ are calculated via [`elbow_coeff()`](#pipe-bend-elbow-coefficient--elbow_coeff).
-
-The pressure drop for the straights along the entire pipe length is the same as above:
-
-$$
-\Delta P = L\left[f_{\text{D}}\frac{\rho}{2}\frac{\langle v \rangle^2}{D_{\text{H}}}\right]
-$$
-
-where we define $\frac{f_{\text{D}}L}{D_{\text{H}}}$ as our straight section coefficient.
-
-The pressure drop for the 90 and 180 degree bends are:
-
-$$
-\Delta P = N_{\text{90}} \left[f_{\text{90,elbow}} \frac{\rho \langle v \rangle^2}{2}\right]
-$$
-
-$$
-\Delta P = N_{\text{180}} \left[f_{\text{180,elbow}} \frac{\rho \langle v \rangle^2}{2}\right]
-$$
-
-where $N_{\text{90}}$ and $N_{\text{180}}$ are the number of 90 and 180 degree bends in the system.
-
-The total returned pressure drop is simply:
-
-$$
-\Delta P = L\left[f_{\text{D}}\frac{\rho}{2}\frac{\langle v \rangle^2}{D_{\text{H}}}\right] + N_{\text{90}} \left[f_{\text{90,elbow}} \frac{\rho \langle v \rangle^2}{2}\right] + N_{\text{180}} \left[f_{\text{180,elbow}} \frac{\rho \langle v \rangle^2}{2}\right]
-$$
-
--------------------
-
-
-
diff --git a/documentation/source/eng-models/generic_methods/pumping.md b/documentation/source/eng-models/generic_methods/pumping.md
index 7047b42199..543756144a 100644
--- a/documentation/source/eng-models/generic_methods/pumping.md
+++ b/documentation/source/eng-models/generic_methods/pumping.md
@@ -1,5 +1,80 @@
 # Pumping Methods
 
+
+## Coolant mechanical pumping power | `coolant_pumping_power()`
+
+To calculate the coolant pumping power we use the change in enthalpies of the coolant as it goes through the pump. 
+**We assume the pump is isentropic so the entropy change of the coolant is 0**. 
+
+The mechanical pumping power is defined as:
+
+$$
+P = \frac{\frac{\dot{m} \times \left(H_{\text{out}}-H_{\text{in}}\right)}{\eta}}{\left(1-fp\right)}
+$$
+
+where $\dot{m}$ is the coolant mass flow rate, $H$ is the coolant enthalpy, $\eta$ is the isentropic efficiency of the pump and $\gamma$ is the adiabatic index of the coolant.
+
+$$
+fp = \frac{T_{\text{pump,out}}\left(\frac{P_{\text{pump,out}}}{P_{\text{pump,in}}}\right)^{-\frac{\gamma -1}{\gamma}}}{\eta \left(T_{\text{pump,in}}-T_{\text{pump,out}}\right)}
+$$
+
+------------------
+
+## Coolant pressure drop | `coolant_friction_pressure_drop()`
+
+The pressure drop in the coolant is given by the [Darcy-Weisbach Equation](https://en.wikipedia.org/wiki/Darcy%E2%80%93Weisbach_equation)
+
+For a cylindrical pipe of uniform diameter the pressure loss due to viscous effects can be characterized by:
+
+$$
+\Delta P = L\left[f_{\text{D}}\frac{\rho}{2}\frac{\langle v \rangle^2}{D_{\text{H}}}\right]
+$$
+
+where $L$ is the pipe length, $f_{\text{D}}$ is the [Darcy friction factor](https://en.wikipedia.org/wiki/Darcy_friction_factor_formulae), $\rho$ is the coolant density, $\langle v \rangle$ is the mean flow coolant velocity and $D_{\text{H}}$ is the hydraulic diameter or the pipe diameter in this case.
+
+To find the Darcy friction factor we need to know the Reynolds number given by:
+
+$$
+\text{Re} = \frac{\rho v L}{\mu}
+$$
+
+here $L$ is the characteristic length which we set to be the pipe diameter and $\mu$ is the coolant dynamic viscosity.
+
+Using the Reynolds number we calculate the Darcy friction factor using the Haaland approximation calculated by [`darcy_friction_haaland()`](../eng-models/generic_methods/pumping.md#pumping-coolant-friction--darcy_friction_haaland).
+
+For the radius of the pipe bend we assume it to be 3 times the radius of the coolant channel.
+
+The elbow coefficients for the 90 and 180 degree bends $\left(f_{\text{90,elbow}}, f_{\text{180,elbow}}\right)$ are calculated via [`elbow_coeff()`](#pipe-bend-elbow-coefficient--elbow_coeff).
+
+The pressure drop for the straights along the entire pipe length is the same as above:
+
+$$
+\Delta P = L\left[f_{\text{D}}\frac{\rho}{2}\frac{\langle v \rangle^2}{D_{\text{H}}}\right]
+$$
+
+where we define $\frac{f_{\text{D}}L}{D_{\text{H}}}$ as our straight section coefficient.
+
+The pressure drop for the 90 and 180 degree bends are:
+
+$$
+\Delta P = N_{\text{90}} \left[f_{\text{90,elbow}} \frac{\rho \langle v \rangle^2}{2}\right]
+$$
+
+$$
+\Delta P = N_{\text{180}} \left[f_{\text{180,elbow}} \frac{\rho \langle v \rangle^2}{2}\right]
+$$
+
+where $N_{\text{90}}$ and $N_{\text{180}}$ are the number of 90 and 180 degree bends in the system.
+
+The total returned pressure drop is simply:
+
+$$
+\Delta P = L\left[f_{\text{D}}\frac{\rho}{2}\frac{\langle v \rangle^2}{D_{\text{H}}}\right] + N_{\text{90}} \left[f_{\text{90,elbow}} \frac{\rho \langle v \rangle^2}{2}\right] + N_{\text{180}} \left[f_{\text{180,elbow}} \frac{\rho \langle v \rangle^2}{2}\right]
+$$
+
+-------------------
+
+
 ## Pumping coolant friction | `darcy_friction_haaland()`
 
  The pressure drop is based on the Darcy friction factor, using the [Haaland equation](https://en.wikipedia.org/wiki/Darcy_friction_factor_formulae#Haaland_equation), an approximation to the implicit Colebrook–White equation. 
diff --git a/process/models/blankets/blanket_library.py b/process/models/blankets/blanket_library.py
index 92184ef051..70ef8faa5b 100644
--- a/process/models/blankets/blanket_library.py
+++ b/process/models/blankets/blanket_library.py
@@ -24,9 +24,7 @@
     CoolantFrictionLossParameters,
     CoolantType,
     calculate_required_mass_flow_rate,
-    calculate_reynolds_number,
-    darcy_friction_haaland,
-    elbow_coeff,
+    coolant_friction_pressure_drop,
 )
 from process.models.fw import N_FW_PIPE_90_DEG_BENDS, N_FW_PIPE_180_DEG_BENDS
 from process.models.power import PumpingPowerModelTypes
@@ -2695,7 +2693,6 @@ def thermo_hydraulic_model(self, output: bool):
 
             # Mechanical pumping power for the first wall (MW)
             self.data.heat_transport.p_fw_coolant_pump_mw = self.coolant_pumping_power(
-                output=output,
                 i_liquid_breeder=1,
                 temp_coolant_pump_outlet=self.data.fwbs.temp_fw_coolant_in,
                 temp_coolant_pump_inlet=self.data.fwbs.temp_fw_coolant_out,
@@ -2704,12 +2701,12 @@ def thermo_hydraulic_model(self, output: bool):
                 mflow_coolant_total=self.data.blanket.mflow_fw_coolant_total,
                 i_coolant_type=self.data.fwbs.i_fw_coolant_type,
                 den_coolant=self.data.fwbs.den_fw_coolant,
-                label="First Wall",
+                etaiso=self.data.fwbs.etaiso,
+                etaiso_liq=self.data.fwbs.etaiso_liq,
             )
 
             # Mechanical pumping power for the blanket (MW)
             self.data.heat_transport.p_blkt_coolant_pump_mw = self.coolant_pumping_power(
-                output=output,
                 i_liquid_breeder=1,
                 temp_coolant_pump_outlet=self.data.fwbs.temp_blkt_coolant_in,
                 temp_coolant_pump_inlet=self.data.fwbs.temp_blkt_coolant_out,
@@ -2718,7 +2715,8 @@ def thermo_hydraulic_model(self, output: bool):
                 mflow_coolant_total=self.data.blanket.mflow_blkt_coolant_total,
                 i_coolant_type=(self.data.fwbs.i_blkt_coolant_type),
                 den_coolant=self.data.fwbs.den_blkt_coolant,
-                label="Blanket",
+                etaiso=self.data.fwbs.etaiso,
+                etaiso_liq=self.data.fwbs.etaiso_liq,
             )
 
             # Total mechanical pumping power (MW)
@@ -2753,7 +2751,6 @@ def thermo_hydraulic_model(self, output: bool):
 
             # Mechanical pumping power for the blanket (MW)
             self.data.heat_transport.p_blkt_breeder_pump_mw = self.coolant_pumping_power(
-                output=output,
                 i_liquid_breeder=2,
                 temp_coolant_pump_outlet=self.data.fwbs.inlet_temp_liq,
                 temp_coolant_pump_inlet=self.data.fwbs.outlet_temp_liq,
@@ -2762,7 +2759,8 @@ def thermo_hydraulic_model(self, output: bool):
                 mflow_coolant_total=self.data.blanket.mfblkt_liq,
                 i_coolant_type=(self.data.fwbs.i_blkt_coolant_type),
                 den_coolant=self.data.fwbs.den_liq,
-                label="Liquid Metal Breeder/Coolant",
+                etaiso=self.data.fwbs.etaiso,
+                etaiso_liq=self.data.fwbs.etaiso_liq,
             )
 
             self.data.heat_transport.htpmw_blkt_tot = (
@@ -3069,20 +3067,20 @@ def total_pressure_drop(
         )
 
         # Friction - for all coolants
-        friction_params: CoolantFrictionLossParameters = (
-            self.coolant_friction_pressure_drop(
-                i_ps=icoolpump,
-                radius_pipe_90_deg_bend=radius_pipe_90_deg_bend,
-                radius_pipe_180_deg_bend=radius_pipe_180_deg_bend,
-                n_pipe_90_deg_bends=n_pipe_90_deg_bends,
-                n_pipe_180_deg_bends=n_pipe_180_deg_bends,
-                len_pipe=len_pipe,
-                den_coolant=den_coolant,
-                visc_coolant=visc_coolant_dynamic,
-                vel_coolant=vel_coolant,
-                roughness_channel=self.data.fwbs.roughness_fw_channel,
-                radius_channel=self.data.fwbs.radius_fw_channel,
-            )
+        friction_params: CoolantFrictionLossParameters = coolant_friction_pressure_drop(
+            i_ps=icoolpump,
+            radius_pipe_90_deg_bend=radius_pipe_90_deg_bend,
+            radius_pipe_180_deg_bend=radius_pipe_180_deg_bend,
+            n_pipe_90_deg_bends=n_pipe_90_deg_bends,
+            n_pipe_180_deg_bends=n_pipe_180_deg_bends,
+            len_pipe=len_pipe,
+            den_coolant=den_coolant,
+            visc_coolant=visc_coolant_dynamic,
+            vel_coolant=vel_coolant,
+            roughness_channel=self.data.fwbs.roughness_fw_channel,
+            radius_channel=self.data.fwbs.radius_fw_channel,
+            a_bz_liq=self.data.fwbs.a_bz_liq,
+            b_bz_liq=self.data.fwbs.b_bz_liq,
         )
         dpres_friction = friction_params.dpres_total
 
@@ -3265,364 +3263,6 @@ def liquid_breeder_mhd_pressure_drop(
 
         return liquid_breeder_pressure_drop_mhd
 
-    def coolant_friction_pressure_drop(
-        self,
-        i_ps: int,
-        radius_pipe_90_deg_bend: float,
-        radius_pipe_180_deg_bend: float,
-        n_pipe_90_deg_bends: float,
-        n_pipe_180_deg_bends: float,
-        len_pipe: float,
-        den_coolant: float,
-        visc_coolant: float,
-        vel_coolant: float,
-        roughness_channel: float,
-        radius_channel: float,
-    ) -> CoolantFrictionLossParameters:
-        """Pressure drops are calculated for a pipe with a number of 90
-        and 180 degree bends. The pressure drop due to frictional forces along
-        the total straight length of the pipe is calculated, then the pressure
-        drop due to the bends is calculated. The total pressure drop is the sum
-        of all contributions.
-
-        Parameters
-        ----------
-        i_ps :
-            switch for primary or secondary coolant
-        radius_pipe_90_deg_bend :
-            radius of 90 degree bend in pipe [m]
-        radius_pipe_180_deg_bend :
-            radius of 180 degree bend in pipe [m]
-        n_pipe_90_deg_bends :
-            number of 90 degree bends in the pipe
-        n_pipe_180_deg_bends :
-            number of 180 degree bends in the pipe
-        len_pipe :
-            total flow length along pipe [m]
-        den_coolant :
-            coolant density [kg/m³]
-        visc_coolant :
-            coolant viscosity [Pa s]
-        vel_coolant :
-            coolant flow velocity [m/s]
-        roughness_channel :
-            roughness of the channel wall (ε) [m]
-        radius_channel :
-            radius of the channel [m]
-
-        Returns
-        -------
-        :
-            `CoolantFrictionLossParameters` dataclass containing:
-            - Total pressure drop due to friction (Pa)
-            - Pressure drop due to straight sections (Pa)
-            - Pressure drop due to 90 degree bends (Pa)
-            - Pressure drop due to 180 degree bends (Pa)
-            - Reynolds number
-            - Darcy friction factor
-            - Pressure drop coefficient for straight sections
-            - Pressure drop coefficient for 90 degree bends
-            - Pressure drop coefficient for 180 degree bends
-
-        Notes
-        -----
-            Darcy-Weisbach Equation (straight pipe):
-
-            ΔP = λ * L/D * (p 〈v〉²) / 2
-
-            λ - Darcy friction factor, L - pipe length, D - hydraulic diameter,
-            p - fluid density, 〈v〉 - fluid flow average velocity
-
-            This function also calculates pressure drop equations for elbow bends,
-            with modified coefficients.
-
-            N.B. Darcy friction factor is estimated from the Haaland approximation.
-        """
-        # Calculate hydraulic dimater for round or retancular pipe (m)
-        dia_pipe = self.pipe_hydraulic_diameter(i_channel_shape=i_ps)
-
-        # Reynolds number
-        reynolds_number = calculate_reynolds_number(
-            den_coolant=den_coolant,
-            vel_coolant=vel_coolant,
-            radius_channel=dia_pipe / 2,
-            visc_coolant=visc_coolant,
-        )
-
-        # Calculate Darcy friction factor
-        # N.B. friction function Uses Haaland approx. which assumes a filled
-        # circular pipe.
-        # Use dh which allows us to do fluid calculations for non-circular tubes
-        # (dh is estimate appropriate for fully developed flow).
-
-        darcy_friction_factor = darcy_friction_haaland(
-            reynolds=reynolds_number,
-            roughness_channel=roughness_channel,
-            radius_channel=radius_channel,
-        )
-
-        # Pressure drop coefficient
-
-        # Straight section
-        f_straight = darcy_friction_factor * len_pipe / dia_pipe
-
-        # 90 degree elbow pressure drop coefficient
-        f_elbow_90 = elbow_coeff(
-            radius_pipe_elbow=radius_pipe_90_deg_bend,
-            deg_pipe_elbow=90.0,
-            darcy_friction=darcy_friction_factor,
-            dia_pipe=dia_pipe,
-        )
-
-        # 180 degree elbow pressure drop coefficient
-        f_elbow_180 = elbow_coeff(
-            radius_pipe_elbow=radius_pipe_180_deg_bend,
-            deg_pipe_elbow=180.0,
-            darcy_friction=darcy_friction_factor,
-            dia_pipe=dia_pipe,
-        )
-
-        # Pressure drop due to friction in straight sections
-        dpres_straight = f_straight * 0.5 * den_coolant * vel_coolant**2
-
-        # Pressure drop due to 90 and 180 degree bends
-        dpres_90 = f_elbow_90 * 0.5 * den_coolant * vel_coolant**2
-        dpres_90_total = n_pipe_90_deg_bends * dpres_90
-        dpres_180 = f_elbow_180 * 0.5 * den_coolant * vel_coolant**2
-        dpres_180_total = n_pipe_180_deg_bends * dpres_180
-
-        dpres_bends_total = dpres_90_total + dpres_180_total
-
-        # Total pressure drop (Pa)
-        dpres_total = dpres_straight + dpres_bends_total
-
-        return CoolantFrictionLossParameters(
-            dpres_total=dpres_total,
-            dpres_straight=dpres_straight,
-            dpres_90=dpres_90,
-            dpres_90_total=dpres_90_total,
-            dpres_180=dpres_180,
-            dpres_180_total=dpres_180_total,
-            dpres_bends_total=dpres_bends_total,
-            reynolds_number=reynolds_number,
-            darcy_friction_factor=darcy_friction_factor,
-            f_straight=f_straight,
-            len_straight=len_pipe,
-            f_elbow_90=f_elbow_90,
-            f_elbow_180=f_elbow_180,
-        )
-
-    def pipe_hydraulic_diameter(self, i_channel_shape):
-        """Caculate the hydraulic diameter (m) for a given coolant pipe size/shape.
-
-
-        Parameters
-        ----------
-        i_channel_shape :
-            switch for circular or rectangular channel crossection.
-            Shape depends on whether primary or secondary coolant
-
-        Raises
-        ------
-        ProcessValueError
-            If i_channel_shape is an invalid option (not in [1,2])
-        """
-        # If primary coolant then circular channels assumed
-        if i_channel_shape == 1:
-            return 2.0 * self.data.fwbs.radius_fw_channel
-
-        # If secondary coolant then rectangular channels assumed
-        if i_channel_shape == 2:
-            return (
-                2
-                * self.data.fwbs.a_bz_liq
-                * self.data.fwbs.b_bz_liq
-                / (self.data.fwbs.a_bz_liq + self.data.fwbs.b_bz_liq)
-            )
-
-        raise ProcessValueError(
-            f"i_channel_shape ={i_channel_shape} is an invalid option."
-        )
-
-    def coolant_pumping_power(
-        self,
-        output: bool,
-        i_liquid_breeder: int,
-        temp_coolant_pump_outlet: float,
-        temp_coolant_pump_inlet: float,
-        pres_coolant_pump_inlet: float,
-        dpres_coolant: float,
-        mflow_coolant_total: float,
-        i_coolant_type: int,
-        den_coolant: float,
-        label: str,
-    ) -> float:
-        """Calculate the coolant pumping power in MW for the first wall (FW) or
-        breeding blanket (BZ) coolant.
-
-        Parameters
-        ----------
-        output : bool
-            Whether to write data to output file.
-        i_liquid_breeder : int
-            Switch for primary coolant or secondary coolant/breeder
-            (1=primary He/H2O, 2=secondary PbLi/Li).
-        temp_coolant_pump_outlet : float
-            Pump outlet temperature (K).
-        temp_coolant_pump_inlet : float
-            Pump inlet temperature (K).
-        pres_coolant_pump_inlet : float
-            Outlet (pump inlet) coolant pressure (Pa).
-        dpres_coolant : float
-            Coolant pressure drop (Pa).
-        mflow_coolant_total : float
-            Total coolant mass flow rate in (kg/s).
-        i_coolant_type : int
-            Type of FW/blanket coolant (e.g., 1=Helium, 2=Water)
-        den_coolant : float
-            Density of coolant or liquid breeder (kg/m³).
-        label : str
-            Description label for output.
-
-        Returns
-        -------
-        float
-            Pumping power in MW.
-
-        Raises
-        ------
-        ProcessValueError
-            If calculated pressure drops in the coolant are too large to be feasible
-
-        References
-        ----------
-            - Idel'Cik, I. E. (1969), Memento des pertes de charge
-            - S.P. Sukhatme (2005), A Textbook on Heat Transfer
-        """
-        # Pump outlet pressure (Pa)
-        # The pump adds the pressure lost going through the coolant channels back
-        pres_coolant_pump_outlet = pres_coolant_pump_inlet + dpres_coolant
-
-        # Adiabatic index for helium or water
-        gamma = (5 / 3) if i_coolant_type == CoolantType.HELIUM else (4 / 3)
-
-        # If calculating for primary coolant
-        if i_liquid_breeder == 1:
-            # The pumping power is be calculated in the most general way,
-            # using enthalpies before and after the pump.
-
-            pump_outlet_fluid_properties = FluidProperties.of(
-                fluid_name=CoolantType(i_coolant_type).full_name,
-                temperature=temp_coolant_pump_outlet,
-                pressure=pres_coolant_pump_outlet,
-            )
-
-            # Assume isentropic pump so that s1 = s2
-            s1 = pump_outlet_fluid_properties.entropy
-
-            # Get specific enthalpy at the outlet (J/kg) before pump using
-            # pressure and entropy s1
-            pump_inlet_fluid_properties = FluidProperties.of(
-                fluid_name=CoolantType(i_coolant_type).full_name,
-                pressure=pres_coolant_pump_inlet,
-                entropy=s1,
-            )
-
-            # Pumping power (MW) is given by enthalpy change, with a correction for
-            # the isentropic efficiency of the pump.
-            fp = (
-                temp_coolant_pump_outlet
-                * (
-                    1
-                    - (pres_coolant_pump_outlet / pres_coolant_pump_inlet)
-                    ** -((gamma - 1) / gamma)
-                )
-                / (
-                    self.data.fwbs.etaiso
-                    * (temp_coolant_pump_inlet - temp_coolant_pump_outlet)
-                )
-            )
-            pumppower = (
-                1e-6
-                * mflow_coolant_total
-                * (
-                    pump_outlet_fluid_properties.enthalpy
-                    - pump_inlet_fluid_properties.enthalpy
-                )
-                / self.data.fwbs.etaiso
-            ) / (1 - fp)
-
-        # If calculating for secondary coolant/breeder...
-        else:
-            # Calculate specific volume
-            spec_vol = 1 / den_coolant
-
-            # Pumping power (MW) is given by pressure change, with a correction for
-            # the isentropic efficiency of the pump.
-            fp = (
-                temp_coolant_pump_outlet
-                * (
-                    1
-                    - (pres_coolant_pump_outlet / pres_coolant_pump_inlet)
-                    ** -((gamma - 1) / gamma)
-                )
-                / (
-                    self.data.fwbs.etaiso_liq
-                    * (temp_coolant_pump_inlet - temp_coolant_pump_outlet)
-                )
-            )
-            pumppower = (
-                1e-6
-                * mflow_coolant_total
-                * spec_vol
-                * dpres_coolant
-                / self.data.fwbs.etaiso_liq
-            ) / (1 - fp)
-
-        # Error for dpres_coolant too large
-        if fp >= 1:
-            raise ProcessValueError(
-                "Pressure drops in coolant are too large to be feasible"
-            )
-
-        if output:
-            po.oheadr(self.outfile, "Mechanical Pumping Power for " + label)
-            po.osubhd(self.outfile, "Pumping power for " + label)
-
-            po.ovarre(
-                self.outfile, "Pumping power (MW)", "(pumppower)", pumppower, "OP "
-            )
-            po.ovarre(
-                self.outfile,
-                "FW or Blanket inlet (pump oulet) pressure (Pa)",
-                "(coolpin)",
-                pres_coolant_pump_outlet,
-                "OP ",
-            )
-            po.ovarre(
-                self.outfile,
-                "FW or Blanket oulet (pump inlet) pressure (Pa)",
-                "(pres_coolant_pump_inlet)",
-                pres_coolant_pump_inlet,
-                "OP ",
-            )
-            po.ovarre(
-                self.outfile,
-                "FW or Blanket total pressure drop (Pa)",
-                "(dpres_coolant)",
-                dpres_coolant,
-                "OP ",
-            )
-            po.ovarre(
-                self.outfile,
-                "Mass flow rate in (kg/s) = ",
-                "(mf)",
-                mflow_coolant_total,
-                "OP ",
-            )
-
-        return pumppower
-
     def output_blkt_pumping_variables(self):
 
         po.oheadr(self.outfile, "Blanket pumping variables")
@@ -3913,7 +3553,12 @@ def calculate_basic_geometry(self):
         """Calculate basic outboard blanket geometry"""
         self.component_volumes()
 
-        dia_blkt_channel = self.pipe_hydraulic_diameter(i_channel_shape=1)
+        dia_blkt_channel = self.pipe_hydraulic_diameter(
+            i_channel_shape=1,
+            radius_fw_channel=self.data.fwbs.radius_fw_channel,
+            a_bz_liq=self.data.fwbs.a_bz_liq,
+            b_bz_liq=self.data.fwbs.b_bz_liq,
+        )
         self.data.fwbs.radius_blkt_channel = dia_blkt_channel / 2
         (
             self.data.fwbs.radius_blkt_channel_90_bend,
@@ -4044,7 +3689,12 @@ def calculate_basic_geometry(self):
         """Calculate basic inboard blanket geometry"""
         self.component_volumes()
 
-        dia_blkt_channel = self.pipe_hydraulic_diameter(i_channel_shape=1)
+        dia_blkt_channel = self.pipe_hydraulic_diameter(
+            i_channel_shape=1,
+            radius_fw_channel=self.data.fwbs.radius_fw_channel,
+            a_bz_liq=self.data.fwbs.a_bz_liq,
+            b_bz_liq=self.data.fwbs.b_bz_liq,
+        )
         self.data.fwbs.radius_blkt_channel = dia_blkt_channel / 2
         (
             self.data.fwbs.radius_blkt_channel_90_bend,
diff --git a/process/models/blankets/dcll.py b/process/models/blankets/dcll.py
index 82616d4293..8985f9d6b0 100644
--- a/process/models/blankets/dcll.py
+++ b/process/models/blankets/dcll.py
@@ -126,7 +126,12 @@ def run(self, output: bool = False):
             self.data.blanket.deg_blkt_inboard_poloidal_plasma / 360.0
         )
 
-        dia_blkt_channel = self.pipe_hydraulic_diameter(i_channel_shape=1)
+        dia_blkt_channel = self.pipe_hydraulic_diameter(
+            i_channel_shape=1,
+            radius_fw_channel=self.data.fwbs.radius_fw_channel,
+            a_bz_liq=self.data.fwbs.a_bz_liq,
+            b_bz_liq=self.data.fwbs.b_bz_liq,
+        )
         self.data.fwbs.radius_blkt_channel = dia_blkt_channel / 2
         (
             self.data.fwbs.radius_blkt_channel_90_bend,
diff --git a/process/models/blankets/hcpb.py b/process/models/blankets/hcpb.py
index f0bea066f2..c34016aace 100644
--- a/process/models/blankets/hcpb.py
+++ b/process/models/blankets/hcpb.py
@@ -15,7 +15,10 @@
     calculate_pipe_bend_radius,
     pumping_powers_as_fractions,
 )
-from process.models.engineering.pumping import CoolantType
+from process.models.engineering.pumping import (
+    CoolantType,
+    pipe_hydraulic_diameter,
+)
 from process.models.power import PumpingPowerModelTypes
 from process.models.tfcoil.base import TFConductorModel
 
@@ -73,7 +76,12 @@ def run(self, output: bool = False):
             self.data.blanket.deg_blkt_inboard_poloidal_plasma / 360.0
         )
 
-        dia_blkt_channel = self.pipe_hydraulic_diameter(i_channel_shape=1)
+        dia_blkt_channel = pipe_hydraulic_diameter(
+            i_channel_shape=1,
+            radius_fw_channel=self.data.fwbs.radius_fw_channel,
+            a_bz_liq=self.data.fwbs.a_bz_liq,
+            b_bz_liq=self.data.fwbs.b_bz_liq,
+        )
         self.data.fwbs.radius_blkt_channel = dia_blkt_channel / 2
         (
             self.data.fwbs.radius_blkt_channel_90_bend,
diff --git a/process/models/engineering/pumping.py b/process/models/engineering/pumping.py
index 2984d048c3..368e50b518 100644
--- a/process/models/engineering/pumping.py
+++ b/process/models/engineering/pumping.py
@@ -7,6 +7,7 @@
 
 import numpy as np
 
+from process.core.coolprop_interface import FluidProperties
 from process.core.exceptions import ProcessValueError
 
 logger = logging.getLogger(__name__)
@@ -78,6 +79,189 @@ class CoolantFrictionLossParameters:
     """Friction factor for 180 degree bends in the coolant channel"""
 
 
+def coolant_friction_pressure_drop(
+    i_ps: int,
+    radius_pipe_90_deg_bend: float,
+    radius_pipe_180_deg_bend: float,
+    n_pipe_90_deg_bends: float,
+    n_pipe_180_deg_bends: float,
+    len_pipe: float,
+    den_coolant: float,
+    visc_coolant: float,
+    vel_coolant: float,
+    roughness_channel: float,
+    radius_channel: float,
+    a_bz_liq: float,
+    b_bz_liq: float,
+) -> CoolantFrictionLossParameters:
+    """Pressure drops are calculated for a pipe with a number of 90
+    and 180 degree bends. The pressure drop due to frictional forces along
+    the total straight length of the pipe is calculated, then the pressure
+    drop due to the bends is calculated. The total pressure drop is the sum
+    of all contributions.
+
+    Parameters
+    ----------
+    i_ps :
+        switch for primary or secondary coolant
+    radius_pipe_90_deg_bend :
+        radius of 90 degree bend in pipe [m]
+    radius_pipe_180_deg_bend :
+        radius of 180 degree bend in pipe [m]
+    n_pipe_90_deg_bends :
+        number of 90 degree bends in the pipe
+    n_pipe_180_deg_bends :
+        number of 180 degree bends in the pipe
+    len_pipe :
+        total flow length along pipe [m]
+    den_coolant :
+        coolant density [kg/m³]
+    visc_coolant :
+        coolant viscosity [Pa s]
+    vel_coolant :
+        coolant flow velocity [m/s]
+    roughness_channel :
+        roughness of the channel wall (ε) [m]
+    radius_channel :
+        radius of the channel [m]
+    a_bz_liq :
+        width of the breeding blanket coolant channel [m]
+    b_bz_liq :
+        height of the breeding blanket coolant channel [m]
+
+
+    Returns
+    -------
+    :
+        `CoolantFrictionLossParameters` dataclass containing:
+        - Total pressure drop due to friction (Pa)
+        - Pressure drop due to straight sections (Pa)
+        - Pressure drop due to 90 degree bends (Pa)
+        - Pressure drop due to 180 degree bends (Pa)
+        - Reynolds number
+        - Darcy friction factor
+        - Pressure drop coefficient for straight sections
+        - Pressure drop coefficient for 90 degree bends
+        - Pressure drop coefficient for 180 degree bends
+
+    Notes
+    -----
+        Darcy-Weisbach Equation (straight pipe):
+
+        ΔP = λ * L/D * (p 〈v〉²) / 2
+
+        λ - Darcy friction factor, L - pipe length, D - hydraulic diameter,
+        p - fluid density, 〈v〉 - fluid flow average velocity
+
+        This function also calculates pressure drop equations for elbow bends,
+        with modified coefficients.
+
+        N.B. Darcy friction factor is estimated from the Haaland approximation.
+    """
+    # Calculate hydraulic dimater for round or retancular pipe (m)
+    dia_pipe = pipe_hydraulic_diameter(
+        i_channel_shape=i_ps,
+        radius_fw_channel=radius_channel,
+        a_bz_liq=a_bz_liq,
+        b_bz_liq=b_bz_liq,
+    )
+
+    # Reynolds number
+    reynolds_number = calculate_reynolds_number(
+        den_coolant=den_coolant,
+        vel_coolant=vel_coolant,
+        radius_channel=dia_pipe / 2,
+        visc_coolant=visc_coolant,
+    )
+
+    # Calculate Darcy friction factor
+    # N.B. friction function Uses Haaland approx. which assumes a filled
+    # circular pipe.
+    # Use dh which allows us to do fluid calculations for non-circular tubes
+    # (dh is estimate appropriate for fully developed flow).
+
+    darcy_friction_factor = darcy_friction_haaland(
+        reynolds=reynolds_number,
+        roughness_channel=roughness_channel,
+        radius_channel=radius_channel,
+    )
+
+    # Pressure drop coefficient
+
+    # Straight section
+    f_straight = darcy_friction_factor * len_pipe / dia_pipe
+
+    # 90 degree elbow pressure drop coefficient
+    f_elbow_90 = elbow_coeff(
+        radius_pipe_elbow=radius_pipe_90_deg_bend,
+        deg_pipe_elbow=90.0,
+        darcy_friction=darcy_friction_factor,
+        dia_pipe=dia_pipe,
+    )
+
+    # 180 degree elbow pressure drop coefficient
+    f_elbow_180 = elbow_coeff(
+        radius_pipe_elbow=radius_pipe_180_deg_bend,
+        deg_pipe_elbow=180.0,
+        darcy_friction=darcy_friction_factor,
+        dia_pipe=dia_pipe,
+    )
+
+    # Pressure drop due to friction in straight sections
+    dpres_straight = f_straight * 0.5 * den_coolant * vel_coolant**2
+
+    # Pressure drop due to 90 and 180 degree bends
+    dpres_90 = f_elbow_90 * 0.5 * den_coolant * vel_coolant**2
+    dpres_90_total = n_pipe_90_deg_bends * dpres_90
+    dpres_180 = f_elbow_180 * 0.5 * den_coolant * vel_coolant**2
+    dpres_180_total = n_pipe_180_deg_bends * dpres_180
+
+    dpres_bends_total = dpres_90_total + dpres_180_total
+
+    # Total pressure drop (Pa)
+    dpres_total = dpres_straight + dpres_bends_total
+
+    return CoolantFrictionLossParameters(
+        dpres_total=dpres_total,
+        dpres_straight=dpres_straight,
+        dpres_90=dpres_90,
+        dpres_90_total=dpres_90_total,
+        dpres_180=dpres_180,
+        dpres_180_total=dpres_180_total,
+        dpres_bends_total=dpres_bends_total,
+        reynolds_number=reynolds_number,
+        darcy_friction_factor=darcy_friction_factor,
+        f_straight=f_straight,
+        len_straight=len_pipe,
+        f_elbow_90=f_elbow_90,
+        f_elbow_180=f_elbow_180,
+    )
+
+
+def pipe_hydraulic_diameter(
+    i_channel_shape, radius_fw_channel: float, a_bz_liq: float, b_bz_liq: float
+) -> float:
+    """Caculate the hydraulic diameter (m) for a given coolant pipe size/shape.
+
+
+    Parameters
+    ----------
+    i_channel_shape :
+        switch for circular or rectangular channel crossection.
+        Shape depends on whether primary or secondary coolant
+    """
+    # If primary coolant then circular channels assumed
+    if i_channel_shape == 1:
+        return 2.0 * radius_fw_channel
+
+    # If secondary coolant then rectangular channels assumed
+    if i_channel_shape == 2:
+        return 2 * a_bz_liq * b_bz_liq / (a_bz_liq + b_bz_liq)
+
+    raise ProcessValueError(f"i_channel_shape ={i_channel_shape} is an invalid option.")
+
+
+@staticmethod
 def darcy_friction_haaland(
     reynolds: float, roughness_channel: float, radius_channel: float
 ) -> float:
@@ -99,8 +283,8 @@ def darcy_friction_haaland(
 
     Notes
     -----
-       The Haaland equation is an approximation to the implicit Colebrook-White equation.
-       It is used to calculate the Darcy friction factor for turbulent flow in pipes.
+    The Haaland equation is an approximation to the implicit Colebrook-White equation.
+    It is used to calculate the Darcy friction factor for turbulent flow in pipes.
 
     References
     ----------
@@ -113,6 +297,131 @@ def darcy_friction_haaland(
     return (1.8 * np.log10(bracket)) ** (-2)
 
 
+def coolant_pumping_power(
+    i_liquid_breeder: int,
+    temp_coolant_pump_outlet: float,
+    temp_coolant_pump_inlet: float,
+    pres_coolant_pump_inlet: float,
+    dpres_coolant: float,
+    mflow_coolant_total: float,
+    i_coolant_type: int,
+    den_coolant: float,
+    etaiso: float,
+    etaiso_liq: float,
+) -> float:
+    """Calculate the coolant pumping power in MW for the first wall (FW) or breeding blanket (BZ) coolant.
+
+    Parameters
+    ----------
+    output : bool
+        Whether to write data to output file.
+    i_liquid_breeder : int
+        Switch for primary coolant or secondary coolant/breeder (1=primary He/H2O, 2=secondary PbLi/Li).
+    temp_coolant_pump_outlet : float
+        Pump outlet temperature (K).
+    temp_coolant_pump_inlet : float
+        Pump inlet temperature (K).
+    pressure : float
+        Outlet (pump inlet) coolant pressure (Pa).
+    dpres_coolant : float
+        Coolant pressure drop (Pa).
+    mflow_coolant_total : float
+        Total coolant mass flow rate in (kg/s).
+    i_coolant_type : int
+        Type of FW/blanket coolant (e.g., 1=Helium, 2=Water)
+    den_coolant : float
+        Density of coolant or liquid breeder (kg/m³).
+    etaiso : float
+        Isentropic efficiency of the pump for primary coolant.
+    etaiso_liq : float
+        Isentropic efficiency of the pump for secondary coolant/breeder.
+
+    Returns
+    -------
+    float
+        Pumping power in MW.
+
+    References
+    ----------
+        - Idel'Cik, I. E. (1969), Memento des pertes de charge
+        - S.P. Sukhatme (2005), A Textbook on Heat Transfer
+    """
+    # Pump outlet pressure (Pa)
+    # The pump adds the pressure lost going through the coolant channels back
+    pres_coolant_pump_outlet = pres_coolant_pump_inlet + dpres_coolant
+
+    # Adiabatic index for helium or water
+    gamma = (5 / 3) if i_coolant_type == CoolantType.HELIUM else (4 / 3)
+
+    # If calculating for primary coolant
+    if i_liquid_breeder == 1:
+        # The pumping power is be calculated in the most general way,
+        # using enthalpies before and after the pump.
+
+        pump_outlet_fluid_properties = FluidProperties.of(
+            fluid_name=CoolantType(i_coolant_type).full_name,
+            temperature=temp_coolant_pump_outlet,
+            pressure=pres_coolant_pump_outlet,
+        )
+
+        # Assume isentropic pump so that s1 = s2
+        s1 = pump_outlet_fluid_properties.entropy
+
+        # Get specific enthalpy at the outlet (J/kg) before pump using pressure and entropy s1
+        pump_inlet_fluid_properties = FluidProperties.of(
+            fluid_name=CoolantType(i_coolant_type).full_name,
+            pressure=pres_coolant_pump_inlet,
+            entropy=s1,
+        )
+
+        # Pumping power (MW) is given by enthalpy change, with a correction for
+        # the isentropic efficiency of the pump.
+        fp = (
+            temp_coolant_pump_outlet
+            * (
+                1
+                - (pres_coolant_pump_outlet / pres_coolant_pump_inlet)
+                ** -((gamma - 1) / gamma)
+            )
+            / (etaiso * (temp_coolant_pump_inlet - temp_coolant_pump_outlet))
+        )
+        pumppower = (
+            1e-6
+            * mflow_coolant_total
+            * (
+                pump_outlet_fluid_properties.enthalpy
+                - pump_inlet_fluid_properties.enthalpy
+            )
+            / etaiso
+        ) / (1 - fp)
+
+    # If calculating for secondary coolant/breeder...
+    else:
+        # Calculate specific volume
+        spec_vol = 1 / den_coolant
+
+        # Pumping power (MW) is given by pressure change, with a correction for
+        # the isentropic efficiency of the pump.
+        fp = (
+            temp_coolant_pump_outlet
+            * (
+                1
+                - (pres_coolant_pump_outlet / pres_coolant_pump_inlet)
+                ** -((gamma - 1) / gamma)
+            )
+            / (etaiso_liq * (temp_coolant_pump_inlet - temp_coolant_pump_outlet))
+        )
+        pumppower = (
+            1e-6 * mflow_coolant_total * spec_vol * dpres_coolant / etaiso_liq
+        ) / (1 - fp)
+
+    # Error for dpres_coolant too large
+    if fp >= 1:
+        raise ProcessValueError("Pressure drops in coolant are too large to be feasible")
+
+    return pumppower
+
+
 def gnielinski_heat_transfer_coefficient(
     mflux_coolant: float,
     den_coolant: float,
@@ -207,8 +516,12 @@ def gnielinski_heat_transfer_coefficient(
     return heat_transfer_coefficient
 
 
+@staticmethod
 def calculate_reynolds_number(
-    den_coolant: float, vel_coolant: float, radius_channel: float, visc_coolant: float
+    den_coolant: float,
+    vel_coolant: float,
+    radius_channel: float,
+    visc_coolant: float,
 ) -> float:
     """Calculate Reynolds number for flow in a pipe.
 
@@ -236,6 +549,7 @@ def calculate_reynolds_number(
     return den_coolant * vel_coolant * diameter / visc_coolant
 
 
+@staticmethod
 def elbow_coeff(
     radius_pipe_elbow: float,
     deg_pipe_elbow: float,
@@ -300,6 +614,7 @@ def elbow_coeff(
     return ximt + xift
 
 
+@staticmethod
 def calculate_required_mass_flow_rate(
     p_heat_total: float,
     heatcap_coolant: float,
diff --git a/tests/unit/models/blankets/test_blanket_library.py b/tests/unit/models/blankets/test_blanket_library.py
index 5c4ecde54b..c80fef542e 100644
--- a/tests/unit/models/blankets/test_blanket_library.py
+++ b/tests/unit/models/blankets/test_blanket_library.py
@@ -1,4 +1,4 @@
-from typing import TYPE_CHECKING, Any, NamedTuple
+from typing import Any, NamedTuple
 
 import numpy as np
 import pytest
@@ -7,9 +7,6 @@
 from process.models.blankets.blanket_library import InboardBlanket
 from process.models.engineering.pumping import CoolantType
 
-if TYPE_CHECKING:
-    from process.models.engineering.pumping import CoolantFrictionLossParameters
-
 
 @pytest.fixture
 def blanket_library(process_models):
@@ -21,6 +18,16 @@ def blanket_library(process_models):
     return process_models.blanket_library
 
 
+@pytest.fixture
+def pumping(process_models):
+    """Fixture to get the Physics instance from process_models.
+
+    :returns: initialised Physics object
+    :rtype: process.physics.Physics
+    """
+    return process_models.pumping
+
+
 class PrimaryCoolantPropertiesParam(NamedTuple):
     i_fw_coolant_type: Any = None
 
@@ -345,50 +352,6 @@ def test_deltap_tot_outboard_blanket_breeder_liquid(monkeypatch, blanket_library
     assert dpres_total == pytest.approx(56.95922064419226)
 
 
-def test_pumppower_primary_helium(monkeypatch, blanket_library):
-    monkeypatch.setattr(blanket_library.data.fwbs, "etaiso", 0.9)
-    monkeypatch.setattr(blanket_library.data.fwbs, "etaiso_liq", 0.85)
-
-    data = {
-        "i_liquid_breeder": 2,
-        "temp_coolant_pump_outlet": 570,
-        "temp_coolant_pump_inlet": 720,
-        "pres_coolant_pump_inlet": 1700000,
-        "dpres_coolant": 303517.3,
-        "mflow_coolant_total": 35677.7,
-        "i_coolant_type": 1,
-        "den_coolant": 9753.25,
-        "label": "Liquid Metal Breeder/Coolant",
-    }
-
-    assert (
-        pytest.approx(blanket_library.coolant_pumping_power(False, **data))
-        == 1.8251284651310427
-    )
-
-
-def test_pumppower_secondary_pb_li(monkeypatch, blanket_library):
-    monkeypatch.setattr(blanket_library.data.fwbs, "etaiso", 0.9)
-    monkeypatch.setattr(blanket_library.data.fwbs, "etaiso_liq", 0.85)
-
-    data = {
-        "i_liquid_breeder": 1,
-        "temp_coolant_pump_outlet": 573,
-        "temp_coolant_pump_inlet": 773,
-        "pres_coolant_pump_inlet": 8000000,
-        "dpres_coolant": 20088.23,
-        "mflow_coolant_total": 956.3,
-        "i_coolant_type": CoolantType.HELIUM,
-        "den_coolant": 5.64,
-        "label": "First Wall and Blanket",
-    }
-
-    assert (
-        pytest.approx(blanket_library.coolant_pumping_power(False, **data), rel=1e-4)
-        == 3.2374845432302464
-    )
-
-
 class ComponentHalfHeightParam(NamedTuple):
     z_tf_inside_half: Any = None
     dz_xpoint_divertor: Any = None
@@ -1025,109 +988,6 @@ def test_liquid_breeder_properties(
     )
 
 
-class CoolantFrictionLossParam(NamedTuple):
-    radius_channel: Any = None
-    radius_pipe_90_deg_bend: Any = None
-    radius_pipe_180_deg_bend: Any = None
-    a_bz_liq: Any = None
-    b_bz_liq: Any = None
-    roughness_channel: Any = None
-    i_ps: Any = None
-    n_pipe_90_deg_bends: Any = None
-    n_pipe_180_deg_bends: Any = None
-    len_pipe: Any = None
-    den_coolant: Any = None
-    visc_coolant: Any = None
-    vel_coolant: Any = None
-    label: Any = None
-    expected_pressure_drop_out: Any = None
-
-
-@pytest.mark.parametrize(
-    "coolantfrictionlossparam",
-    [
-        CoolantFrictionLossParam(
-            radius_channel=0.0060000000000000001,
-            radius_pipe_90_deg_bend=0.018,
-            radius_pipe_180_deg_bend=0.09,
-            a_bz_liq=0.20000000000000001,
-            b_bz_liq=0.20000000000000001,
-            roughness_channel=9.9999999999999995e-07,
-            i_ps=1,
-            n_pipe_90_deg_bends=2,
-            n_pipe_180_deg_bends=0,
-            len_pipe=4,
-            den_coolant=10.405276820718059,
-            visc_coolant=3.604452999475736e-05,
-            vel_coolant=32.753134225223164,
-            label="Inboard first wall",
-            expected_pressure_drop_out=36213.58989742931,
-        ),
-        CoolantFrictionLossParam(
-            radius_channel=1.0,
-            radius_pipe_90_deg_bend=1.0,
-            radius_pipe_180_deg_bend=1.0,
-            a_bz_liq=1.0,
-            b_bz_liq=1.0,
-            roughness_channel=1e-6,
-            i_ps=2,
-            n_pipe_90_deg_bends=1.0,
-            n_pipe_180_deg_bends=1.0,
-            len_pipe=1.0,
-            den_coolant=1.0,
-            visc_coolant=1.0,
-            vel_coolant=1.0,
-            label="label",
-            expected_pressure_drop_out=1.4325633520224854,
-        ),
-    ],
-)
-def test_coolant_friction_loss(coolantfrictionlossparam, monkeypatch, blanket_library):
-    """
-    Automatically generated Unit Test for pressure_drop.
-
-    This test was generated using data from
-    blanket_files/large_tokamak_primary_pumping2.IN.DAT.
-
-    Parameters
-    ----------
-    coolantfrictionlossparam : CoolantFrictionLossParam
-        the data used to mock and assert in this test.
-    monkeypatch : _pytest.monkeypatch.monkeypatch
-        pytest fixture used to mock module/class variables
-    blanket_library : BlanketLibrary
-        the blanket library instance used in this test.
-
-    """
-
-    monkeypatch.setattr(
-        blanket_library.data.fwbs, "a_bz_liq", coolantfrictionlossparam.a_bz_liq
-    )
-    monkeypatch.setattr(
-        blanket_library.data.fwbs, "b_bz_liq", coolantfrictionlossparam.b_bz_liq
-    )
-
-    pressure_params: CoolantFrictionLossParameters = (
-        blanket_library.coolant_friction_pressure_drop(
-            i_ps=coolantfrictionlossparam.i_ps,
-            radius_pipe_90_deg_bend=(coolantfrictionlossparam.radius_pipe_90_deg_bend),
-            radius_pipe_180_deg_bend=(coolantfrictionlossparam.radius_pipe_180_deg_bend),
-            n_pipe_90_deg_bends=coolantfrictionlossparam.n_pipe_90_deg_bends,
-            n_pipe_180_deg_bends=coolantfrictionlossparam.n_pipe_180_deg_bends,
-            len_pipe=coolantfrictionlossparam.len_pipe,
-            den_coolant=coolantfrictionlossparam.den_coolant,
-            visc_coolant=coolantfrictionlossparam.visc_coolant,
-            vel_coolant=coolantfrictionlossparam.vel_coolant,
-            roughness_channel=coolantfrictionlossparam.roughness_channel,
-            radius_channel=coolantfrictionlossparam.radius_channel,
-        )
-    )
-
-    assert pressure_params.dpres_total == pytest.approx(
-        coolantfrictionlossparam.expected_pressure_drop_out
-    )
-
-
 class LiquidBreederPressureDropMhdParam(NamedTuple):
     i_blkt_liquid_breeder_channel_type: Any = None
     a_bz_liq: Any = None
@@ -1592,22 +1452,6 @@ def test_calculate_elliptical_blkt_volumes(
     )
 
 
-def test_hydraulic_diameter(monkeypatch, blanket_library):
-    """
-    Test for hydraulic_diameter function.
-    """
-    # Set var values
-    monkeypatch.setattr(blanket_library.data.fwbs, "radius_fw_channel", 1.0)
-    monkeypatch.setattr(blanket_library.data.fwbs, "a_bz_liq", 1.0)
-    monkeypatch.setattr(blanket_library.data.fwbs, "b_bz_liq", 1.0)
-
-    # hydraulic_diameter input = i_channel_shape: 1 = circle, 2 = rectangle
-    # 2.0D0*radius_fw_channel
-    assert blanket_library.pipe_hydraulic_diameter(1) == pytest.approx(2.0)
-    # 2*a_bz_liq*b_bz_liq/(a_bz_liq+b_bz_liq)
-    assert blanket_library.pipe_hydraulic_diameter(2) == pytest.approx(1.0)
-
-
 def test_flow_velocity(monkeypatch, blanket_library):
     """
     Test for flow_velocity function.
diff --git a/tests/unit/models/engineering/test_pumping.py b/tests/unit/models/engineering/test_pumping.py
index bc5fbee253..ac5a6f9fbd 100644
--- a/tests/unit/models/engineering/test_pumping.py
+++ b/tests/unit/models/engineering/test_pumping.py
@@ -1,14 +1,31 @@
+from typing import Any, NamedTuple
+
 import pytest
 
 from process.models.engineering.pumping import (
+    CoolantFrictionLossParameters,
+    CoolantType,
     calculate_required_mass_flow_rate,
     calculate_reynolds_number,
+    coolant_friction_pressure_drop,
+    coolant_pumping_power,
     darcy_friction_haaland,
     elbow_coeff,
     gnielinski_heat_transfer_coefficient,
+    pipe_hydraulic_diameter,
 )
 
 
+@pytest.fixture
+def blanket_library(process_models):
+    """Provides BlanketLibrary object for testing.
+
+    :returns: initialised BlanketLibrary object
+    :rtype: process.blanket_library.BlanketLibrary
+    """
+    return process_models.blanket_library
+
+
 def test_darcy_friction_haaland():
     assert darcy_friction_haaland(
         reynolds=5500, roughness_channel=1e-6, radius_channel=0.1
@@ -76,3 +93,157 @@ def test_calculate_required_mass_flow_rate_zero_temperature_rise():
             temp_in_coolant=300.0,
             temp_out_coolant=300.0,
         )
+
+
+def test_hydraulic_diameter():
+    """
+    Test for hydraulic_diameter function.
+    """
+
+    # hydraulic_diameter input = i_channel_shape: 1 = circle, 2 = rectangle
+    # 2.0D0*radius_fw_channel
+    assert pipe_hydraulic_diameter(
+        1, radius_fw_channel=1.0, a_bz_liq=1.0, b_bz_liq=1.0
+    ) == pytest.approx(2.0)
+    # 2*a_bz_liq*b_bz_liq/(a_bz_liq+b_bz_liq)
+    assert pipe_hydraulic_diameter(
+        2, radius_fw_channel=1.0, a_bz_liq=1.0, b_bz_liq=1.0
+    ) == pytest.approx(1.0)
+
+
+class CoolantFrictionLossParam(NamedTuple):
+    radius_channel: Any = None
+    radius_pipe_90_deg_bend: Any = None
+    radius_pipe_180_deg_bend: Any = None
+    a_bz_liq: Any = None
+    b_bz_liq: Any = None
+    roughness_channel: Any = None
+    i_ps: Any = None
+    n_pipe_90_deg_bends: Any = None
+    n_pipe_180_deg_bends: Any = None
+    len_pipe: Any = None
+    den_coolant: Any = None
+    visc_coolant: Any = None
+    vel_coolant: Any = None
+    label: Any = None
+    expected_pressure_drop_out: Any = None
+
+
+@pytest.mark.parametrize(
+    "coolantfrictionlossparam",
+    [
+        CoolantFrictionLossParam(
+            radius_channel=0.0060000000000000001,
+            radius_pipe_90_deg_bend=0.018,
+            radius_pipe_180_deg_bend=0.09,
+            a_bz_liq=0.20000000000000001,
+            b_bz_liq=0.20000000000000001,
+            roughness_channel=9.9999999999999995e-07,
+            i_ps=1,
+            n_pipe_90_deg_bends=2,
+            n_pipe_180_deg_bends=0,
+            len_pipe=4,
+            den_coolant=10.405276820718059,
+            visc_coolant=3.604452999475736e-05,
+            vel_coolant=32.753134225223164,
+            label="Inboard first wall",
+            expected_pressure_drop_out=36213.58989742931,
+        ),
+        CoolantFrictionLossParam(
+            radius_channel=1.0,
+            radius_pipe_90_deg_bend=1.0,
+            radius_pipe_180_deg_bend=1.0,
+            a_bz_liq=1.0,
+            b_bz_liq=1.0,
+            roughness_channel=1e-6,
+            i_ps=2,
+            n_pipe_90_deg_bends=1.0,
+            n_pipe_180_deg_bends=1.0,
+            len_pipe=1.0,
+            den_coolant=1.0,
+            visc_coolant=1.0,
+            vel_coolant=1.0,
+            label="label",
+            expected_pressure_drop_out=1.4325633520224854,
+        ),
+    ],
+)
+def test_coolant_friction_loss(coolantfrictionlossparam, monkeypatch, blanket_library):
+    """
+    Automatically generated Regression Unit Test for coolant_friction_loss.
+
+    This test was generated using data from
+    blanket_files/large_tokamak_primary_pumping2.IN.DAT.
+
+    Parameters
+    ----------
+    coolantfrictionlossparam : CoolantFrictionLossParam
+        the data used to mock and assert in this test.
+    monkeypatch : _pytest.monkeypatch.monkeypatch
+        pytest fixture used to mock module/class variables
+    blanket_library : BlanketLibrary
+        the blanket library instance used in this test.
+
+    """
+    monkeypatch.setattr(
+        blanket_library.data.fwbs, "a_bz_liq", coolantfrictionlossparam.a_bz_liq
+    )
+    monkeypatch.setattr(
+        blanket_library.data.fwbs, "b_bz_liq", coolantfrictionlossparam.b_bz_liq
+    )
+
+    pressure_params: CoolantFrictionLossParameters = coolant_friction_pressure_drop(
+        i_ps=coolantfrictionlossparam.i_ps,
+        radius_pipe_90_deg_bend=(coolantfrictionlossparam.radius_pipe_90_deg_bend),
+        radius_pipe_180_deg_bend=(coolantfrictionlossparam.radius_pipe_180_deg_bend),
+        n_pipe_90_deg_bends=coolantfrictionlossparam.n_pipe_90_deg_bends,
+        n_pipe_180_deg_bends=coolantfrictionlossparam.n_pipe_180_deg_bends,
+        len_pipe=coolantfrictionlossparam.len_pipe,
+        den_coolant=coolantfrictionlossparam.den_coolant,
+        visc_coolant=coolantfrictionlossparam.visc_coolant,
+        vel_coolant=coolantfrictionlossparam.vel_coolant,
+        roughness_channel=coolantfrictionlossparam.roughness_channel,
+        radius_channel=coolantfrictionlossparam.radius_channel,
+        a_bz_liq=coolantfrictionlossparam.a_bz_liq,
+        b_bz_liq=coolantfrictionlossparam.b_bz_liq,
+    )
+
+    assert pressure_params.dpres_total == pytest.approx(
+        coolantfrictionlossparam.expected_pressure_drop_out
+    )
+
+
+def test_pumppower_primary_helium():
+
+    data = {
+        "i_liquid_breeder": 2,
+        "temp_coolant_pump_outlet": 570,
+        "temp_coolant_pump_inlet": 720,
+        "pres_coolant_pump_inlet": 1700000,
+        "dpres_coolant": 303517.3,
+        "mflow_coolant_total": 35677.7,
+        "i_coolant_type": CoolantType.HELIUM,
+        "den_coolant": 9753.25,
+        "etaiso": 0.9,
+        "etaiso_liq": 0.85,
+    }
+
+    assert pytest.approx(coolant_pumping_power(**data)) == 1.8251284651310427
+
+
+def test_pumppower_secondary_pb_li():
+
+    data = {
+        "i_liquid_breeder": 1,
+        "temp_coolant_pump_outlet": 573,
+        "temp_coolant_pump_inlet": 773,
+        "pres_coolant_pump_inlet": 8000000,
+        "dpres_coolant": 20088.23,
+        "mflow_coolant_total": 956.3,
+        "i_coolant_type": CoolantType.HELIUM,
+        "den_coolant": 5.64,
+        "etaiso": 0.9,
+        "etaiso_liq": 0.85,
+    }
+
+    assert pytest.approx(coolant_pumping_power(**data), rel=1e-4) == 3.2374845432302464

From 2033ce5efaacaf6ca42c5967a65de5449e196d33 Mon Sep 17 00:00:00 2001
From: mn3981 <christopher.ashe@ukaea.uk>
Date: Fri, 3 Jul 2026 14:09:44 +0100
Subject: [PATCH 21/33] Update some output formatting

---
 process/models/blankets/blanket_library.py | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/process/models/blankets/blanket_library.py b/process/models/blankets/blanket_library.py
index 70ef8faa5b..80d648daf1 100644
--- a/process/models/blankets/blanket_library.py
+++ b/process/models/blankets/blanket_library.py
@@ -3267,7 +3267,7 @@ def output_blkt_pumping_variables(self):
 
         po.oheadr(self.outfile, "Blanket pumping variables")
 
-        po.osubhd(self.outfile, "Inboard Blanket")
+        po.osubhd(self.outfile, "Inboard Blanket:")
 
         po.ovarre(
             self.outfile,
@@ -3308,7 +3308,7 @@ def output_blkt_pumping_variables(self):
         )
         po.oblnkl(self.outfile)
         po.ocmmnt(self.outfile, "----------------------------")
-
+        po.oblnkl(self.outfile)
         po.ovarre(
             self.outfile,
             "Pressure drop for straight sections of inboard blanket (Pa)",
@@ -3405,8 +3405,10 @@ def output_blkt_pumping_variables(self):
             self.data.blanket.f_elbow_blkt_inboard_180_bend,
             "OP ",
         )
+        po.oblnkl(self.outfile)
+        po.ocmmnt(self.outfile, "----------------------------")
 
-        po.osubhd(self.outfile, "Outboard Blanket")
+        po.osubhd(self.outfile, "Outboard Blanket:")
 
         po.ovarre(
             self.outfile,
@@ -3447,7 +3449,7 @@ def output_blkt_pumping_variables(self):
         )
         po.oblnkl(self.outfile)
         po.ocmmnt(self.outfile, "----------------------------")
-
+        po.oblnkl(self.outfile)
         po.ovarre(
             self.outfile,
             "Pressure drop for straight sections of outboard blanket (Pa)",

From 96c3b10274ff00ee70078f6931de3fd46c91b0b3 Mon Sep 17 00:00:00 2001
From: mn3981 <christopher.ashe@ukaea.uk>
Date: Fri, 3 Jul 2026 14:51:34 +0100
Subject: [PATCH 22/33] Fix some coolant pumping power function imports

---
 process/models/blankets/blanket_library.py | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/process/models/blankets/blanket_library.py b/process/models/blankets/blanket_library.py
index 80d648daf1..131c80ebdb 100644
--- a/process/models/blankets/blanket_library.py
+++ b/process/models/blankets/blanket_library.py
@@ -25,6 +25,7 @@
     CoolantType,
     calculate_required_mass_flow_rate,
     coolant_friction_pressure_drop,
+    coolant_pumping_power,
 )
 from process.models.fw import N_FW_PIPE_90_DEG_BENDS, N_FW_PIPE_180_DEG_BENDS
 from process.models.power import PumpingPowerModelTypes
@@ -2635,8 +2636,7 @@ def thermo_hydraulic_model(self, output: bool):
 
             # Total mechanical pumping power (MW)
             self.data.primary_pumping.p_fw_blkt_coolant_pump_mw = (
-                self.coolant_pumping_power(
-                    output=output,
+                coolant_pumping_power(
                     i_liquid_breeder=1,
                     temp_coolant_pump_outlet=self.data.fwbs.temp_fw_coolant_in,
                     temp_coolant_pump_inlet=self.data.fwbs.temp_blkt_coolant_out,
@@ -2645,7 +2645,8 @@ def thermo_hydraulic_model(self, output: bool):
                     mflow_coolant_total=self.data.blanket.mftotal,
                     i_coolant_type=self.data.fwbs.i_fw_coolant_type,
                     den_coolant=self.data.fwbs.den_fw_coolant,
-                    label="First Wall and Blanket",
+                    etaiso=self.data.fwbs.etaiso,
+                    etaiso_liq=self.data.fwbs.etaiso_liq
                 )
             )
 
@@ -2692,7 +2693,7 @@ def thermo_hydraulic_model(self, output: bool):
             )
 
             # Mechanical pumping power for the first wall (MW)
-            self.data.heat_transport.p_fw_coolant_pump_mw = self.coolant_pumping_power(
+            self.data.heat_transport.p_fw_coolant_pump_mw = coolant_pumping_power(
                 i_liquid_breeder=1,
                 temp_coolant_pump_outlet=self.data.fwbs.temp_fw_coolant_in,
                 temp_coolant_pump_inlet=self.data.fwbs.temp_fw_coolant_out,
@@ -2706,7 +2707,7 @@ def thermo_hydraulic_model(self, output: bool):
             )
 
             # Mechanical pumping power for the blanket (MW)
-            self.data.heat_transport.p_blkt_coolant_pump_mw = self.coolant_pumping_power(
+            self.data.heat_transport.p_blkt_coolant_pump_mw = coolant_pumping_power(
                 i_liquid_breeder=1,
                 temp_coolant_pump_outlet=self.data.fwbs.temp_blkt_coolant_in,
                 temp_coolant_pump_inlet=self.data.fwbs.temp_blkt_coolant_out,
@@ -2750,7 +2751,7 @@ def thermo_hydraulic_model(self, output: bool):
             )
 
             # Mechanical pumping power for the blanket (MW)
-            self.data.heat_transport.p_blkt_breeder_pump_mw = self.coolant_pumping_power(
+            self.data.heat_transport.p_blkt_breeder_pump_mw = coolant_pumping_power(
                 i_liquid_breeder=2,
                 temp_coolant_pump_outlet=self.data.fwbs.inlet_temp_liq,
                 temp_coolant_pump_inlet=self.data.fwbs.outlet_temp_liq,

From a02897ddfbecfca81a550fd6a8294b1f0223bba5 Mon Sep 17 00:00:00 2001
From: mn3981 <christopher.ashe@ukaea.uk>
Date: Fri, 3 Jul 2026 15:44:26 +0100
Subject: [PATCH 23/33] Refactor pumping outputs to be specifically for inboard
 and outboard blankets

---
 process/main.py                            |   9 +-
 process/models/blankets/blanket_library.py | 255 +++++++++++----------
 2 files changed, 145 insertions(+), 119 deletions(-)

diff --git a/process/main.py b/process/main.py
index 4b8eec38cd..0f39040ca1 100644
--- a/process/main.py
+++ b/process/main.py
@@ -49,6 +49,7 @@
 from process.core.process_output import OutputFileManager, oheadr
 from process.core.scan import Scan
 from process.data_structure.blanket_variables import BlktModelTypes
+from process.data_structure.build_variables import InboardBlanketConfiguration
 from process.data_structure.cost_variables import CostModels
 from process.data_structure.numerics import PROCESSRunMode
 from process.data_structure.stellarator_variables import StellaratorModel
@@ -951,7 +952,13 @@ def write(self, data, _outfile):
             # DCLL model
             self.dcll.output()
 
-        self.blanket_library.output_blkt_pumping_variables()
+        if (
+            data.build.i_blkt_inboard
+            == InboardBlanketConfiguration.INBOARD_BLANKET_PRESENT
+        ):
+            self.blanket_library.output_inboard_blkt_pumping_variables()
+
+        self.blanket_library.output_outboard_blkt_pumping_variables()
 
         # FISPACT and LOCA model (not used)- removed
 
diff --git a/process/models/blankets/blanket_library.py b/process/models/blankets/blanket_library.py
index 131c80ebdb..b884fa2f1e 100644
--- a/process/models/blankets/blanket_library.py
+++ b/process/models/blankets/blanket_library.py
@@ -2635,19 +2635,17 @@ def thermo_hydraulic_model(self, output: bool):
             )
 
             # Total mechanical pumping power (MW)
-            self.data.primary_pumping.p_fw_blkt_coolant_pump_mw = (
-                coolant_pumping_power(
-                    i_liquid_breeder=1,
-                    temp_coolant_pump_outlet=self.data.fwbs.temp_fw_coolant_in,
-                    temp_coolant_pump_inlet=self.data.fwbs.temp_blkt_coolant_out,
-                    pres_coolant_pump_inlet=self.data.fwbs.pres_fw_coolant,
-                    dpres_coolant=deltap_fw_blkt,
-                    mflow_coolant_total=self.data.blanket.mftotal,
-                    i_coolant_type=self.data.fwbs.i_fw_coolant_type,
-                    den_coolant=self.data.fwbs.den_fw_coolant,
-                    etaiso=self.data.fwbs.etaiso,
-                    etaiso_liq=self.data.fwbs.etaiso_liq
-                )
+            self.data.primary_pumping.p_fw_blkt_coolant_pump_mw = coolant_pumping_power(
+                i_liquid_breeder=1,
+                temp_coolant_pump_outlet=self.data.fwbs.temp_fw_coolant_in,
+                temp_coolant_pump_inlet=self.data.fwbs.temp_blkt_coolant_out,
+                pres_coolant_pump_inlet=self.data.fwbs.pres_fw_coolant,
+                dpres_coolant=deltap_fw_blkt,
+                mflow_coolant_total=self.data.blanket.mftotal,
+                i_coolant_type=self.data.fwbs.i_fw_coolant_type,
+                den_coolant=self.data.fwbs.den_fw_coolant,
+                etaiso=self.data.fwbs.etaiso,
+                etaiso_liq=self.data.fwbs.etaiso_liq,
             )
 
         # If FW and BB have different coolants...
@@ -3264,47 +3262,45 @@ def liquid_breeder_mhd_pressure_drop(
 
         return liquid_breeder_pressure_drop_mhd
 
-    def output_blkt_pumping_variables(self):
+    def output_outboard_blkt_pumping_variables(self):
 
-        po.oheadr(self.outfile, "Blanket pumping variables")
-
-        po.osubhd(self.outfile, "Inboard Blanket:")
+        po.oheadr(self.outfile, "Outboard Blanket pumping variables")
 
         po.ovarre(
             self.outfile,
-            "Inboard blanket coolant channel length (radial direction) (m)",
-            "(len_blkt_inboard_coolant_channel_radial)",
-            self.data.blanket.len_blkt_inboard_coolant_channel_radial,
+            "Outboard blanket coolant channel length (radial direction) (m)",
+            "(len_blkt_outboard_coolant_channel_radial)",
+            self.data.blanket.len_blkt_outboard_coolant_channel_radial,
             "OP ",
         )
         po.ovarre(
             self.outfile,
-            "Inboard blanket coolant channel length (poloidal direction) (m)",
-            "(len_blkt_inboard_segment_poloidal)",
-            self.data.blanket.len_blkt_inboard_segment_poloidal,
+            "Outboard blanket coolant channel length (poloidal direction) (m)",
+            "(len_blkt_outboard_segment_poloidal)",
+            self.data.blanket.len_blkt_outboard_segment_poloidal,
             "OP ",
         )
         po.oblnkl(self.outfile)
         po.ovarre(
             self.outfile,
-            "Number of inboard blanket coolant sections in the radial direction",
-            "(n_blkt_inboard_module_coolant_sections_radial)",
-            self.data.fwbs.n_blkt_inboard_module_coolant_sections_radial,
+            "Number of outboard blanket coolant sections in the radial direction",
+            "(n_blkt_outboard_module_coolant_sections_radial)",
+            self.data.fwbs.n_blkt_outboard_module_coolant_sections_radial,
             "OP ",
         )
         po.ovarre(
             self.outfile,
-            "Number of inboard blanket coolant sections in the poloidal direction",
-            "(n_blkt_inboard_module_coolant_sections_poloidal)",
-            self.data.fwbs.n_blkt_inboard_module_coolant_sections_poloidal,
+            "Number of outboard blanket coolant sections in the poloidal direction",
+            "(n_blkt_outboard_module_coolant_sections_poloidal)",
+            self.data.fwbs.n_blkt_outboard_module_coolant_sections_poloidal,
             "OP ",
         )
         po.oblnkl(self.outfile)
         po.ovarre(
             self.outfile,
-            "Total length of inboard blanket coolant channel straight sections (m)",
-            "(len_blkt_inboard_channel_total)",
-            self.data.blanket.len_blkt_inboard_channel_total,
+            "Total length of outboard blanket coolant channel straight sections (m)",
+            "(len_blkt_outboard_channel_total)",
+            self.data.blanket.len_blkt_outboard_channel_total,
             "OP ",
         )
         po.oblnkl(self.outfile)
@@ -3312,39 +3308,39 @@ def output_blkt_pumping_variables(self):
         po.oblnkl(self.outfile)
         po.ovarre(
             self.outfile,
-            "Pressure drop for straight sections of inboard blanket (Pa)",
-            "(dpres_blkt_inboard_coolant_channel_straight_total)",
-            self.data.blanket.dpres_blkt_inboard_coolant_channel_straight_total,
+            "Pressure drop for straight sections of outboard blanket (Pa)",
+            "(dpres_blkt_outboard_coolant_channel_straight_total)",
+            self.data.blanket.dpres_blkt_outboard_coolant_channel_straight_total,
             "OP ",
         )
         po.oblnkl(self.outfile)
         po.ovarre(
             self.outfile,
-            "Pressure drop for 90° bends of inboard blanket (Pa)",
-            "(dpres_blkt_inboard_coolant_channel_90_bend)",
-            self.data.blanket.dpres_blkt_inboard_coolant_channel_90_bend,
+            "Pressure drop for 90° bends of outboard blanket (Pa)",
+            "(dpres_blkt_outboard_coolant_channel_90_bend)",
+            self.data.blanket.dpres_blkt_outboard_coolant_channel_90_bend,
             "OP ",
         )
         po.ovarre(
             self.outfile,
-            "Total pressure drop for 90° bends of inboard blanket (Pa)",
-            "(dpres_blkt_inboard_coolant_channel_90_bends_total)",
-            self.data.blanket.dpres_blkt_inboard_coolant_channel_90_bends_total,
+            "Total pressure drop for 90° bends of outboard blanket (Pa)",
+            "(dpres_blkt_outboard_coolant_channel_90_bends_total)",
+            self.data.blanket.dpres_blkt_outboard_coolant_channel_90_bends_total,
             "OP ",
         )
         po.oblnkl(self.outfile)
         po.ovarre(
             self.outfile,
-            "Pressure drop for 180° bends of inboard blanket (Pa)",
-            "(dpres_blkt_inboard_coolant_channel_180_bend)",
-            self.data.blanket.dpres_blkt_inboard_coolant_channel_180_bend,
+            "Pressure drop for 180° bends of outboard blanket (Pa)",
+            "(dpres_blkt_outboard_coolant_channel_180_bend)",
+            self.data.blanket.dpres_blkt_outboard_coolant_channel_180_bend,
             "OP ",
         )
         po.ovarre(
             self.outfile,
-            "Total pressure drop for 180° bends of inboard blanket (Pa)",
-            "(dpres_blkt_inboard_coolant_channel_180_bends_total)",
-            self.data.blanket.dpres_blkt_inboard_coolant_channel_180_bends_total,
+            "Total pressure drop for 180° bends of outboard blanket (Pa)",
+            "(dpres_blkt_outboard_coolant_channel_180_bends_total)",
+            self.data.blanket.dpres_blkt_outboard_coolant_channel_180_bends_total,
             "OP ",
         )
 
@@ -3352,100 +3348,111 @@ def output_blkt_pumping_variables(self):
         po.ovarre(
             self.outfile,
             "Total pressure drop for all bends (Pa)",
-            "(dpres_blkt_inboard_bends_total)",
-            self.data.blanket.dpres_blkt_inboard_bends_total,
+            "(dpres_blkt_outboard_bends_total)",
+            self.data.blanket.dpres_blkt_outboard_bends_total,
             "OP ",
         )
 
         po.oblnkl(self.outfile)
         po.ovarre(
             self.outfile,
-            "Reynolds number of inboard blanket coolant",
-            "(reynolds_blkt_inboard_coolant)",
-            self.data.blanket.reynolds_blkt_inboard_coolant,
+            "Reynolds number of outboard blanket coolant",
+            "(reynolds_blkt_outboard_coolant)",
+            self.data.blanket.reynolds_blkt_outboard_coolant,
             "OP ",
         )
 
         po.ovarre(
             self.outfile,
-            "Darcy friction factor of inboard blanket coolant",
-            "(darcy_frict_blkt_inboard_coolant)",
-            self.data.blanket.darcy_frict_blkt_inboard_coolant,
+            "Darcy friction factor of outboard blanket coolant",
+            "(darcy_frict_blkt_outboard_coolant)",
+            self.data.blanket.darcy_frict_blkt_outboard_coolant,
             "OP ",
         )
         po.oblnkl(self.outfile)
 
         po.ovarre(
             self.outfile,
-            "Pressure drop coefficient for straight sections of inboard blanket",
-            "(f_straight_blkt_inboard_coolant)",
-            self.data.blanket.f_straight_blkt_inboard_coolant,
+            "Pressure drop coefficient for straight sections of outboard blanket",
+            "(f_straight_blkt_outboard_coolant)",
+            self.data.blanket.f_straight_blkt_outboard_coolant,
             "OP ",
         )
 
         po.ovarre(
             self.outfile,
-            "Total length of straight sections of inboard blanket coolant channels (m)",
-            "(len_blkt_inboard_coolant_channel_straight_total)",
-            self.data.blanket.len_blkt_inboard_coolant_channel_straight_total,
+            "Total length of straight sections of outboard blanket coolant channels (m)",
+            "(len_blkt_outboard_coolant_channel_straight_total)",
+            self.data.blanket.len_blkt_outboard_coolant_channel_straight_total,
             "OP ",
         )
 
         po.ovarre(
             self.outfile,
-            "Pressure drop coefficient for 90° bends in inboard blanket",
-            "(f_elbow_blkt_inboard_90_bend)",
-            self.data.blanket.f_elbow_blkt_inboard_90_bend,
+            "Pressure drop coefficient for 90° bends in outboard blanket",
+            "(f_elbow_blkt_outboard_90_bend)",
+            self.data.blanket.f_elbow_blkt_outboard_90_bend,
             "OP ",
         )
 
         po.ovarre(
             self.outfile,
-            "Pressure drop coefficient for 180° bends in inboard blanket",
-            "(f_elbow_blkt_inboard_180_bend)",
-            self.data.blanket.f_elbow_blkt_inboard_180_bend,
+            "Pressure drop coefficient for 180° bends in outboard blanket",
+            "(f_elbow_blkt_outboard_180_bend)",
+            self.data.blanket.f_elbow_blkt_outboard_180_bend,
             "OP ",
         )
         po.oblnkl(self.outfile)
         po.ocmmnt(self.outfile, "----------------------------")
+        po.oblnkl(self.outfile)
 
-        po.osubhd(self.outfile, "Outboard Blanket:")
+        po.ovarre(
+            self.outfile,
+            "Mass flow rate of outboard blanket coolant (kg/s)",
+            "(mflow_blkt_outboard_coolant)",
+            self.data.blanket.mflow_blkt_outboard_coolant,
+            "OP ",
+        )
+
+    def output_inboard_blkt_pumping_variables(self):
+
+        po.oheadr(self.outfile, "Inboard Blanket pumping variables")
 
         po.ovarre(
             self.outfile,
-            "Outboard blanket coolant channel length (radial direction) (m)",
-            "(len_blkt_outboard_coolant_channel_radial)",
-            self.data.blanket.len_blkt_outboard_coolant_channel_radial,
+            "Inboard blanket coolant channel length (radial direction) (m)",
+            "(len_blkt_inboard_coolant_channel_radial)",
+            self.data.blanket.len_blkt_inboard_coolant_channel_radial,
             "OP ",
         )
         po.ovarre(
             self.outfile,
-            "Outboard blanket coolant channel length (poloidal direction) (m)",
-            "(len_blkt_outboard_segment_poloidal)",
-            self.data.blanket.len_blkt_outboard_segment_poloidal,
+            "Inboard blanket coolant channel length (poloidal direction) (m)",
+            "(len_blkt_inboard_segment_poloidal)",
+            self.data.blanket.len_blkt_inboard_segment_poloidal,
             "OP ",
         )
         po.oblnkl(self.outfile)
         po.ovarre(
             self.outfile,
-            "Number of outboard blanket coolant sections in the radial direction",
-            "(n_blkt_outboard_module_coolant_sections_radial)",
-            self.data.fwbs.n_blkt_outboard_module_coolant_sections_radial,
+            "Number of inboard blanket coolant sections in the radial direction",
+            "(n_blkt_inboard_module_coolant_sections_radial)",
+            self.data.fwbs.n_blkt_inboard_module_coolant_sections_radial,
             "OP ",
         )
         po.ovarre(
             self.outfile,
-            "Number of outboard blanket coolant sections in the poloidal direction",
-            "(n_blkt_outboard_module_coolant_sections_poloidal)",
-            self.data.fwbs.n_blkt_outboard_module_coolant_sections_poloidal,
+            "Number of inboard blanket coolant sections in the poloidal direction",
+            "(n_blkt_inboard_module_coolant_sections_poloidal)",
+            self.data.fwbs.n_blkt_inboard_module_coolant_sections_poloidal,
             "OP ",
         )
         po.oblnkl(self.outfile)
         po.ovarre(
             self.outfile,
-            "Total length of outboard blanket coolant channel straight sections (m)",
-            "(len_blkt_outboard_channel_total)",
-            self.data.blanket.len_blkt_outboard_channel_total,
+            "Total length of inboard blanket coolant channel straight sections (m)",
+            "(len_blkt_inboard_channel_total)",
+            self.data.blanket.len_blkt_inboard_channel_total,
             "OP ",
         )
         po.oblnkl(self.outfile)
@@ -3453,39 +3460,39 @@ def output_blkt_pumping_variables(self):
         po.oblnkl(self.outfile)
         po.ovarre(
             self.outfile,
-            "Pressure drop for straight sections of outboard blanket (Pa)",
-            "(dpres_blkt_outboard_coolant_channel_straight_total)",
-            self.data.blanket.dpres_blkt_outboard_coolant_channel_straight_total,
+            "Pressure drop for straight sections of inboard blanket (Pa)",
+            "(dpres_blkt_inboard_coolant_channel_straight_total)",
+            self.data.blanket.dpres_blkt_inboard_coolant_channel_straight_total,
             "OP ",
         )
         po.oblnkl(self.outfile)
         po.ovarre(
             self.outfile,
-            "Pressure drop for 90° bends of outboard blanket (Pa)",
-            "(dpres_blkt_outboard_coolant_channel_90_bend)",
-            self.data.blanket.dpres_blkt_outboard_coolant_channel_90_bend,
+            "Pressure drop for 90° bends of inboard blanket (Pa)",
+            "(dpres_blkt_inboard_coolant_channel_90_bend)",
+            self.data.blanket.dpres_blkt_inboard_coolant_channel_90_bend,
             "OP ",
         )
         po.ovarre(
             self.outfile,
-            "Total pressure drop for 90° bends of outboard blanket (Pa)",
-            "(dpres_blkt_outboard_coolant_channel_90_bends_total)",
-            self.data.blanket.dpres_blkt_outboard_coolant_channel_90_bends_total,
+            "Total pressure drop for 90° bends of inboard blanket (Pa)",
+            "(dpres_blkt_inboard_coolant_channel_90_bends_total)",
+            self.data.blanket.dpres_blkt_inboard_coolant_channel_90_bends_total,
             "OP ",
         )
         po.oblnkl(self.outfile)
         po.ovarre(
             self.outfile,
-            "Pressure drop for 180° bends of outboard blanket (Pa)",
-            "(dpres_blkt_outboard_coolant_channel_180_bend)",
-            self.data.blanket.dpres_blkt_outboard_coolant_channel_180_bend,
+            "Pressure drop for 180° bends of inboard blanket (Pa)",
+            "(dpres_blkt_inboard_coolant_channel_180_bend)",
+            self.data.blanket.dpres_blkt_inboard_coolant_channel_180_bend,
             "OP ",
         )
         po.ovarre(
             self.outfile,
-            "Total pressure drop for 180° bends of outboard blanket (Pa)",
-            "(dpres_blkt_outboard_coolant_channel_180_bends_total)",
-            self.data.blanket.dpres_blkt_outboard_coolant_channel_180_bends_total,
+            "Total pressure drop for 180° bends of inboard blanket (Pa)",
+            "(dpres_blkt_inboard_coolant_channel_180_bends_total)",
+            self.data.blanket.dpres_blkt_inboard_coolant_channel_180_bends_total,
             "OP ",
         )
 
@@ -3493,58 +3500,70 @@ def output_blkt_pumping_variables(self):
         po.ovarre(
             self.outfile,
             "Total pressure drop for all bends (Pa)",
-            "(dpres_blkt_outboard_bends_total)",
-            self.data.blanket.dpres_blkt_outboard_bends_total,
+            "(dpres_blkt_inboard_bends_total)",
+            self.data.blanket.dpres_blkt_inboard_bends_total,
             "OP ",
         )
 
         po.oblnkl(self.outfile)
         po.ovarre(
             self.outfile,
-            "Reynolds number of outboard blanket coolant",
-            "(reynolds_blkt_outboard_coolant)",
-            self.data.blanket.reynolds_blkt_outboard_coolant,
+            "Reynolds number of inboard blanket coolant",
+            "(reynolds_blkt_inboard_coolant)",
+            self.data.blanket.reynolds_blkt_inboard_coolant,
             "OP ",
         )
 
         po.ovarre(
             self.outfile,
-            "Darcy friction factor of outboard blanket coolant",
-            "(darcy_frict_blkt_outboard_coolant)",
-            self.data.blanket.darcy_frict_blkt_outboard_coolant,
+            "Darcy friction factor of inboard blanket coolant",
+            "(darcy_frict_blkt_inboard_coolant)",
+            self.data.blanket.darcy_frict_blkt_inboard_coolant,
             "OP ",
         )
         po.oblnkl(self.outfile)
 
         po.ovarre(
             self.outfile,
-            "Pressure drop coefficient for straight sections of outboard blanket",
-            "(f_straight_blkt_outboard_coolant)",
-            self.data.blanket.f_straight_blkt_outboard_coolant,
+            "Pressure drop coefficient for straight sections of inboard blanket",
+            "(f_straight_blkt_inboard_coolant)",
+            self.data.blanket.f_straight_blkt_inboard_coolant,
             "OP ",
         )
 
         po.ovarre(
             self.outfile,
-            "Total length of straight sections of outboard blanket coolant channels (m)",
-            "(len_blkt_outboard_coolant_channel_straight_total)",
-            self.data.blanket.len_blkt_outboard_coolant_channel_straight_total,
+            "Total length of straight sections of inboard blanket coolant channels (m)",
+            "(len_blkt_inboard_coolant_channel_straight_total)",
+            self.data.blanket.len_blkt_inboard_coolant_channel_straight_total,
             "OP ",
         )
 
         po.ovarre(
             self.outfile,
-            "Pressure drop coefficient for 90° bends in outboard blanket",
-            "(f_elbow_blkt_outboard_90_bend)",
-            self.data.blanket.f_elbow_blkt_outboard_90_bend,
+            "Pressure drop coefficient for 90° bends in inboard blanket",
+            "(f_elbow_blkt_inboard_90_bend)",
+            self.data.blanket.f_elbow_blkt_inboard_90_bend,
             "OP ",
         )
 
         po.ovarre(
             self.outfile,
-            "Pressure drop coefficient for 180° bends in outboard blanket",
-            "(f_elbow_blkt_outboard_180_bend)",
-            self.data.blanket.f_elbow_blkt_outboard_180_bend,
+            "Pressure drop coefficient for 180° bends in inboard blanket",
+            "(f_elbow_blkt_inboard_180_bend)",
+            self.data.blanket.f_elbow_blkt_inboard_180_bend,
+            "OP ",
+        )
+
+        po.oblnkl(self.outfile)
+        po.ocmmnt(self.outfile, "----------------------------")
+        po.oblnkl(self.outfile)
+
+        po.ovarre(
+            self.outfile,
+            "Mass flow rate of inboard blanket coolant (kg/s)",
+            "(mflow_blkt_inboard_coolant)",
+            self.data.blanket.mflow_blkt_inboard_coolant,
             "OP ",
         )
 

From bdfa340fa234ee8781b1431fd70463152343b64d Mon Sep 17 00:00:00 2001
From: mn3981 <christopher.ashe@ukaea.uk>
Date: Wed, 15 Jul 2026 08:52:09 +0100
Subject: [PATCH 24/33] Add coolant mass flow rate output

---
 process/core/io/plot/summary.py       | 6 ++++--
 process/models/engineering/pumping.py | 6 ++----
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/process/core/io/plot/summary.py b/process/core/io/plot/summary.py
index 3ac029fb52..a964eb7581 100644
--- a/process/core/io/plot/summary.py
+++ b/process/core/io/plot/summary.py
@@ -16499,7 +16499,8 @@ def plot_blanket_coolant_channel_structure_and_properties(
         f"Darcy Friction factor ($f$): {m_file.get('darcy_frict_blkt_outboard_coolant', scan=scan):.4f}\n\n"
         f"Friction drop coefficient for straight sections: {m_file.get('f_straight_blkt_outboard_coolant', scan=scan):.4f}\n"
         f"Friction drop coefficient for 90° bends: {m_file.get('f_elbow_blkt_outboard_90_bend', scan=scan):.4f}\n"
-        f"Friction drop coefficient for 180° bends: {m_file.get('f_elbow_blkt_outboard_180_bend', scan=scan):.4f}\n"
+        f"Friction drop coefficient for 180° bends: {m_file.get('f_elbow_blkt_outboard_180_bend', scan=scan):.4f}\n\n"
+        f"Total coolant mass flow rate: {m_file.get('mflow_blkt_outboard_coolant', scan=scan):.4f} kg/s\n"
     )
 
     fig.text(
@@ -16538,7 +16539,8 @@ def plot_blanket_coolant_channel_structure_and_properties(
         f"Darcy Friction factor ($f$): {m_file.get('darcy_frict_blkt_inboard_coolant', scan=scan):.4f}\n\n"
         f"Friction drop coefficient for straight sections: {m_file.get('f_straight_blkt_inboard_coolant', scan=scan):.4f}\n"
         f"Friction drop coefficient for 90° bends: {m_file.get('f_elbow_blkt_inboard_90_bend', scan=scan):.4f}\n"
-        f"Friction drop coefficient for 180° bends: {m_file.get('f_elbow_blkt_inboard_180_bend', scan=scan):.4f}\n"
+        f"Friction drop coefficient for 180° bends: {m_file.get('f_elbow_blkt_inboard_180_bend', scan=scan):.4f}\n\n"
+        f"Total coolant mass flow rate: {m_file.get('mflow_blkt_inboard_coolant', scan=scan):.4f} kg/s\n"
     )
 
     fig.text(
diff --git a/process/models/engineering/pumping.py b/process/models/engineering/pumping.py
index 368e50b518..5355ca8f36 100644
--- a/process/models/engineering/pumping.py
+++ b/process/models/engineering/pumping.py
@@ -313,16 +313,14 @@ def coolant_pumping_power(
 
     Parameters
     ----------
-    output : bool
-        Whether to write data to output file.
     i_liquid_breeder : int
         Switch for primary coolant or secondary coolant/breeder (1=primary He/H2O, 2=secondary PbLi/Li).
     temp_coolant_pump_outlet : float
         Pump outlet temperature (K).
     temp_coolant_pump_inlet : float
         Pump inlet temperature (K).
-    pressure : float
-        Outlet (pump inlet) coolant pressure (Pa).
+    pres_coolant_pump_inlet : float
+        Pump inlet pressure (Pa).
     dpres_coolant : float
         Coolant pressure drop (Pa).
     mflow_coolant_total : float

From 8de7197716cc2acc1e956f6dd86c6b2e0f2cb76c Mon Sep 17 00:00:00 2001
From: mn3981 <christopher.ashe@ukaea.uk>
Date: Wed, 15 Jul 2026 08:56:26 +0100
Subject: [PATCH 25/33] Refactor coolant pumping power types to use
 CALCULATE_PRESSURE_DROP and INPUT_PRESSURE_DROP

---
 process/models/blankets/blanket_library.py | 23 +++++++---------------
 process/models/blankets/dcll.py            |  8 ++++----
 process/models/blankets/hcpb.py            |  6 +++---
 process/models/power.py                    | 12 +++++------
 4 files changed, 20 insertions(+), 29 deletions(-)

diff --git a/process/models/blankets/blanket_library.py b/process/models/blankets/blanket_library.py
index b884fa2f1e..f8366a32dc 100644
--- a/process/models/blankets/blanket_library.py
+++ b/process/models/blankets/blanket_library.py
@@ -2576,7 +2576,7 @@ def thermo_hydraulic_model(self, output: bool):
 
         # load in pressures if primary pumping == 2
         i_p_coolant_pumping = PumpingPowerModelTypes(self.data.fwbs.i_p_coolant_pumping)
-        if i_p_coolant_pumping == PumpingPowerModelTypes.MECHANICAL:
+        if i_p_coolant_pumping == PumpingPowerModelTypes.CALCULATE_PRESSURE_DROP:
             deltap = self.thermo_hydraulic_model_pressure_drop_calculations(
                 output=output
             )
@@ -2603,7 +2603,7 @@ def thermo_hydraulic_model(self, output: bool):
         # If FW and BB have the same coolant...
         if self.data.fwbs.i_fw_blkt_shared_coolant == FWBlktCoolantLoopTypes.SHARED_LOOP:
             # Total pressure drop in the first wall/blanket  (Pa)
-            if i_p_coolant_pumping == PumpingPowerModelTypes.MECHANICAL:
+            if i_p_coolant_pumping == PumpingPowerModelTypes.CALCULATE_PRESSURE_DROP:
                 if (
                     self.data.build.i_blkt_inboard
                     == InboardBlanketConfiguration.INBOARD_BLANKET_PRESENT
@@ -2623,10 +2623,7 @@ def thermo_hydraulic_model(self, output: bool):
                         + dpres_fw_outboard_coolant
                         + dpres_blkt_outboard_coolant
                     )
-            elif (
-                i_p_coolant_pumping
-                == PumpingPowerModelTypes.MECHANICAL_WITH_PRESSURE_DROP
-            ):
+            elif i_p_coolant_pumping == PumpingPowerModelTypes.INPUT_PRESSURE_DROP:
                 deltap_fw_blkt = self.data.primary_pumping.dp_fw_blkt
             # Total coolant mass flow rate in the first wall/blanket (kg/s)
             self.data.blanket.mftotal = (
@@ -2653,7 +2650,7 @@ def thermo_hydraulic_model(self, output: bool):
             self.data.fwbs.i_fw_blkt_shared_coolant
             == FWBlktCoolantLoopTypes.SEPARATE_LOOPS
         ):
-            if i_p_coolant_pumping == PumpingPowerModelTypes.MECHANICAL:
+            if i_p_coolant_pumping == PumpingPowerModelTypes.CALCULATE_PRESSURE_DROP:
                 # Total pressure drop in the first wall (Pa)
                 dpres_fw_coolant_total = (
                     dpres_fw_inboard_coolant + dpres_fw_outboard_coolant
@@ -2672,10 +2669,7 @@ def thermo_hydraulic_model(self, output: bool):
                     == InboardBlanketConfiguration.NO_INBOARD_BLANKET
                 ):
                     dpres_blkt_coolant_total = dpres_blkt_outboard_coolant
-            elif (
-                i_p_coolant_pumping
-                == PumpingPowerModelTypes.MECHANICAL_WITH_PRESSURE_DROP
-            ):
+            elif i_p_coolant_pumping == PumpingPowerModelTypes.INPUT_PRESSURE_DROP:
                 dpres_fw_coolant_total = self.data.primary_pumping.dp_fw
                 dpres_blkt_coolant_total = self.data.primary_pumping.dp_blkt
 
@@ -2727,7 +2721,7 @@ def thermo_hydraulic_model(self, output: bool):
         # If the blanket has a liquid metal breeder...
         if self.data.fwbs.i_blkt_dual_coolant > 0:
             # Total pressure drop in the blanket (Pa)
-            if i_p_coolant_pumping == PumpingPowerModelTypes.MECHANICAL:
+            if i_p_coolant_pumping == PumpingPowerModelTypes.CALCULATE_PRESSURE_DROP:
                 if (
                     self.data.build.i_blkt_inboard
                     == InboardBlanketConfiguration.INBOARD_BLANKET_PRESENT
@@ -2738,10 +2732,7 @@ def thermo_hydraulic_model(self, output: bool):
                     == InboardBlanketConfiguration.NO_INBOARD_BLANKET
                 ):
                     deltap_bl_liq = deltap_blo_liq
-            elif (
-                i_p_coolant_pumping
-                == PumpingPowerModelTypes.MECHANICAL_WITH_PRESSURE_DROP
-            ):
+            elif i_p_coolant_pumping == PumpingPowerModelTypes.INPUT_PRESSURE_DROP:
                 deltap_bl_liq = self.data.primary_pumping.dp_liq
             # Total liquid metal breeder/coolant mass flow rate in the blanket (kg/s)
             self.data.blanket.mfblkt_liq = (
diff --git a/process/models/blankets/dcll.py b/process/models/blankets/dcll.py
index 8985f9d6b0..9bdb454a6d 100644
--- a/process/models/blankets/dcll.py
+++ b/process/models/blankets/dcll.py
@@ -375,8 +375,8 @@ def dcll_power_and_heating(self, output: bool):
             )
 
         elif i_p_coolant_pumping in {
-            PumpingPowerModelTypes.MECHANICAL,
-            PumpingPowerModelTypes.MECHANICAL_WITH_PRESSURE_DROP,
+            PumpingPowerModelTypes.CALCULATE_PRESSURE_DROP,
+            PumpingPowerModelTypes.INPUT_PRESSURE_DROP,
         }:
             # Mechanical pumping power is calculated for first wall and blanket
             self.thermo_hydraulic_model(output=output)
@@ -401,8 +401,8 @@ def dcll_power_and_heating(self, output: bool):
             po.osubhd(self.outfile, "DCLL model: Thermal-hydraulics Component Totals")
 
             if self.data.fwbs.i_p_coolant_pumping not in {
-                PumpingPowerModelTypes.MECHANICAL,
-                PumpingPowerModelTypes.MECHANICAL_WITH_PRESSURE_DROP,
+                PumpingPowerModelTypes.CALCULATE_PRESSURE_DROP,
+                PumpingPowerModelTypes.INPUT_PRESSURE_DROP,
             }:
                 po.ovarre(
                     self.outfile,
diff --git a/process/models/blankets/hcpb.py b/process/models/blankets/hcpb.py
index c34016aace..9c9c153bda 100644
--- a/process/models/blankets/hcpb.py
+++ b/process/models/blankets/hcpb.py
@@ -845,7 +845,7 @@ def powerflow_calc(self, output: bool):
                 p_div_rad_total_mw=self.data.fwbs.p_div_rad_total_mw,
             )
 
-        elif i_p_coolant_pumping == PumpingPowerModelTypes.MECHANICAL:
+        elif i_p_coolant_pumping == PumpingPowerModelTypes.CALCULATE_PRESSURE_DROP:
             # Calculate the required material properties of the FW and BB coolant.
             self.primary_coolant_properties(output=output)
             # Mechanical pumping power is calculated for first wall and blanket
@@ -916,7 +916,7 @@ def powerflow_calc(self, output: bool):
                     self.data.fwbs.radius_blkt_channel_180_bend,
                 )
 
-        elif i_p_coolant_pumping == PumpingPowerModelTypes.MECHANICAL_WITH_PRESSURE_DROP:
+        elif i_p_coolant_pumping == PumpingPowerModelTypes.INPUT_PRESSURE_DROP:
             # Issue #503
             # Mechanical pumping power is calculated using specified pressure drop for
             # first wall and blanket circuit, including heat exchanger and pipes
@@ -1611,7 +1611,7 @@ def write_output(self):
 
         if (
             self.data.fwbs.i_p_coolant_pumping
-            != PumpingPowerModelTypes.MECHANICAL_WITH_PRESSURE_DROP
+            != PumpingPowerModelTypes.INPUT_PRESSURE_DROP
         ):
             po.ovarre(
                 self.outfile,
diff --git a/process/models/power.py b/process/models/power.py
index 99a3f4d296..3b8bf57819 100644
--- a/process/models/power.py
+++ b/process/models/power.py
@@ -22,8 +22,8 @@ class PumpingPowerModelTypes(IntEnum):
 
     USER_INPUT = 0
     FRACTION_OF_HEAT = 1
-    MECHANICAL = 2
-    MECHANICAL_WITH_PRESSURE_DROP = 3
+    CALCULATE_PRESSURE_DROP = 2
+    INPUT_PRESSURE_DROP = 3
 
 
 logger = logging.getLogger(__name__)
@@ -822,8 +822,8 @@ def component_thermal_powers(self):
         """
         i_p_coolant_pumping = PumpingPowerModelTypes(self.data.fwbs.i_p_coolant_pumping)
         if i_p_coolant_pumping not in {
-            PumpingPowerModelTypes.MECHANICAL,
-            PumpingPowerModelTypes.MECHANICAL_WITH_PRESSURE_DROP,
+            PumpingPowerModelTypes.CALCULATE_PRESSURE_DROP,
+            PumpingPowerModelTypes.INPUT_PRESSURE_DROP,
         }:
             self.data.primary_pumping.p_fw_blkt_coolant_pump_mw = (
                 self.data.heat_transport.p_fw_coolant_pump_mw
@@ -956,7 +956,7 @@ def component_thermal_powers(self):
 
         #  Heat removal from first wall and divertor (MW) (only used in costs.f90)
         i_p_coolant_pumping = PumpingPowerModelTypes(self.data.fwbs.i_p_coolant_pumping)
-        if i_p_coolant_pumping != PumpingPowerModelTypes.MECHANICAL_WITH_PRESSURE_DROP:
+        if i_p_coolant_pumping != PumpingPowerModelTypes.INPUT_PRESSURE_DROP:
             self.data.heat_transport.p_fw_div_heat_deposited_mw = (
                 self.data.power.p_fw_heat_deposited_mw
                 + self.data.power.p_div_heat_deposited_mw
@@ -1694,7 +1694,7 @@ def plant_electric_production(self):
             )
             if (
                 self.data.fwbs.i_blkt_dual_coolant > 0
-                and i_p_coolant_pumping == PumpingPowerModelTypes.MECHANICAL
+                and i_p_coolant_pumping == PumpingPowerModelTypes.CALCULATE_PRESSURE_DROP
             ):
                 self.data.heat_transport.p_plant_electric_gross_mw = (
                     (

From 0c82b7e4812b9dc9c6a8e17990559274d00ad1e0 Mon Sep 17 00:00:00 2001
From: mn3981 <christopher.ashe@ukaea.uk>
Date: Wed, 15 Jul 2026 09:06:37 +0100
Subject: [PATCH 26/33] Rename mass flow rate variables for clarity in blanket
 model

---
 process/data_structure/blanket_variables.py |  4 ++--
 process/models/blankets/blanket_library.py  | 24 ++++++++++-----------
 2 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/process/data_structure/blanket_variables.py b/process/data_structure/blanket_variables.py
index 43452b356e..ee28b9b8b7 100644
--- a/process/data_structure/blanket_variables.py
+++ b/process/data_structure/blanket_variables.py
@@ -149,10 +149,10 @@ class BlanketData:
     n_blkt_outboard_channels: float = 0.0
     """Outboard total number of blanket coolant pipes"""
 
-    mfblktpi: float = 0.0
+    mflow_blkt_inboard_coolant_channel: float = 0.0
     """Inboard mass flow rate per coolant pipe (kg/s)"""
 
-    mfblktpo: float = 0.0
+    mflow_blkt_outboard_coolant_channel: float = 0.0
     """Outboard mass flow rate per coolant pipe (kg/s)"""
 
     vel_blkt_inboard_coolant: float = 0.0
diff --git a/process/models/blankets/blanket_library.py b/process/models/blankets/blanket_library.py
index f8366a32dc..1d138070ac 100644
--- a/process/models/blankets/blanket_library.py
+++ b/process/models/blankets/blanket_library.py
@@ -1200,7 +1200,7 @@ def thermo_hydraulic_model_pressure_drop_calculations(self, output: bool):
             )
 
             # Mass flow rate per coolant pipe
-            self.data.blanket.mfblktpo = (
+            self.data.blanket.mflow_blkt_outboard_coolant_channel = (
                 self.data.blanket.mflow_blkt_outboard_coolant
                 / self.data.blanket.n_blkt_outboard_channels
             )
@@ -1209,7 +1209,7 @@ def thermo_hydraulic_model_pressure_drop_calculations(self, output: bool):
             # Assume BZ structure has same channel width as FW
             self.data.blanket.vel_blkt_outboard_coolant = self.flow_velocity(
                 i_channel_shape=1,
-                mass_flow_rate=self.data.blanket.mfblktpo,
+                mass_flow_rate=self.data.blanket.mflow_blkt_outboard_coolant_channel,
                 flow_density=self.data.fwbs.den_blkt_coolant,
             )
             velblkto_liq = self.flow_velocity(
@@ -1242,7 +1242,7 @@ def thermo_hydraulic_model_pressure_drop_calculations(self, output: bool):
                 )
 
                 # Mass flow rate per coolant pipe
-                self.data.blanket.mfblktpi = (
+                self.data.blanket.mflow_blkt_inboard_coolant_channel = (
                     self.data.blanket.mflow_blkt_inboard_coolant
                     / self.data.blanket.n_blkt_inboard_channels
                 )
@@ -1254,7 +1254,7 @@ def thermo_hydraulic_model_pressure_drop_calculations(self, output: bool):
                 # Assume BZ structure has same channel width as FW
                 self.data.blanket.vel_blkt_inboard_coolant = self.flow_velocity(
                     i_channel_shape=1,
-                    mass_flow_rate=self.data.blanket.mfblktpi,
+                    mass_flow_rate=self.data.blanket.mflow_blkt_inboard_coolant_channel,
                     flow_density=self.data.fwbs.den_blkt_coolant,
                 )
                 velblkti_liq = self.flow_velocity(
@@ -1284,7 +1284,7 @@ def thermo_hydraulic_model_pressure_drop_calculations(self, output: bool):
             )
 
             # Mass flow rate per coolant pipe
-            self.data.blanket.mfblktpo = (
+            self.data.blanket.mflow_blkt_outboard_coolant_channel = (
                 self.data.blanket.mflow_blkt_outboard_coolant
                 / self.data.blanket.n_blkt_outboard_channels
             )
@@ -1293,7 +1293,7 @@ def thermo_hydraulic_model_pressure_drop_calculations(self, output: bool):
             # Assume BZ structure has same channel width as FW
             self.data.blanket.vel_blkt_outboard_coolant = self.flow_velocity(
                 i_channel_shape=1,
-                mass_flow_rate=self.data.blanket.mfblktpo,
+                mass_flow_rate=self.data.blanket.mflow_blkt_outboard_coolant_channel,
                 flow_density=self.data.fwbs.den_blkt_coolant,
             )
 
@@ -1336,7 +1336,7 @@ def thermo_hydraulic_model_pressure_drop_calculations(self, output: bool):
                 )
 
                 # Mass flow rate per coolant pipe
-                self.data.blanket.mfblktpi = (
+                self.data.blanket.mflow_blkt_inboard_coolant_channel = (
                     self.data.blanket.mflow_blkt_inboard_coolant
                     / self.data.blanket.n_blkt_inboard_channels
                 )
@@ -1345,7 +1345,7 @@ def thermo_hydraulic_model_pressure_drop_calculations(self, output: bool):
                 # Assume BZ structure has same channel width as FW
                 self.data.blanket.vel_blkt_inboard_coolant = self.flow_velocity(
                     i_channel_shape=1,
-                    mass_flow_rate=self.data.blanket.mfblktpi,
+                    mass_flow_rate=self.data.blanket.mflow_blkt_inboard_coolant_channel,
                     flow_density=self.data.fwbs.den_blkt_coolant,
                 )
 
@@ -1382,7 +1382,7 @@ def thermo_hydraulic_model_pressure_drop_calculations(self, output: bool):
             )
 
             # Mass flow rate per coolant pipe
-            self.data.blanket.mfblktpo = (
+            self.data.blanket.mflow_blkt_outboard_coolant_channel = (
                 self.data.blanket.mflow_blkt_outboard_coolant
                 / self.data.blanket.n_blkt_outboard_channels
             )
@@ -1391,7 +1391,7 @@ def thermo_hydraulic_model_pressure_drop_calculations(self, output: bool):
             # Assume BZ structure has same channel width as FW
             self.data.blanket.vel_blkt_outboard_coolant = self.flow_velocity(
                 i_channel_shape=1,
-                mass_flow_rate=self.data.blanket.mfblktpo,
+                mass_flow_rate=self.data.blanket.mflow_blkt_outboard_coolant_channel,
                 flow_density=self.data.fwbs.den_blkt_coolant,
             )
 
@@ -1413,7 +1413,7 @@ def thermo_hydraulic_model_pressure_drop_calculations(self, output: bool):
                 )
 
                 # Mass flow rate per coolant pipe
-                self.data.blanket.mfblktpi = (
+                self.data.blanket.mflow_blkt_inboard_coolant_channel = (
                     self.data.blanket.mflow_blkt_inboard_coolant
                     / self.data.blanket.n_blkt_inboard_channels
                 )
@@ -1422,7 +1422,7 @@ def thermo_hydraulic_model_pressure_drop_calculations(self, output: bool):
                 # Assume BZ structure has same channel width as FW
                 self.data.blanket.vel_blkt_inboard_coolant = self.flow_velocity(
                     i_channel_shape=1,
-                    mass_flow_rate=self.data.blanket.mfblktpi,
+                    mass_flow_rate=self.data.blanket.mflow_blkt_inboard_coolant_channel,
                     flow_density=self.data.fwbs.den_blkt_coolant,
                 )
 

From 539fb4facdf046a46061be78ed08a3117efdffc5 Mon Sep 17 00:00:00 2001
From: mn3981 <christopher.ashe@ukaea.uk>
Date: Wed, 15 Jul 2026 09:18:56 +0100
Subject: [PATCH 27/33] Add coolant mass flow rate and velocity outputs for
 single channels in blanket model

---
 process/core/io/plot/summary.py            |  4 ++++
 process/models/blankets/blanket_library.py | 28 ++++++++++++++++++++++
 2 files changed, 32 insertions(+)

diff --git a/process/core/io/plot/summary.py b/process/core/io/plot/summary.py
index a964eb7581..4d6bb0ca56 100644
--- a/process/core/io/plot/summary.py
+++ b/process/core/io/plot/summary.py
@@ -16501,6 +16501,8 @@ def plot_blanket_coolant_channel_structure_and_properties(
         f"Friction drop coefficient for 90° bends: {m_file.get('f_elbow_blkt_outboard_90_bend', scan=scan):.4f}\n"
         f"Friction drop coefficient for 180° bends: {m_file.get('f_elbow_blkt_outboard_180_bend', scan=scan):.4f}\n\n"
         f"Total coolant mass flow rate: {m_file.get('mflow_blkt_outboard_coolant', scan=scan):.4f} kg/s\n"
+        f"Coolant mass flow rate in single channel: {m_file.get('mflow_blkt_outboard_coolant_channel', scan=scan):.4f} kg/s\n"
+        f"Coolant velocity in single channel: {m_file.get('vel_blkt_outboard_coolant', scan=scan):.4f} m/s"
     )
 
     fig.text(
@@ -16541,6 +16543,8 @@ def plot_blanket_coolant_channel_structure_and_properties(
         f"Friction drop coefficient for 90° bends: {m_file.get('f_elbow_blkt_inboard_90_bend', scan=scan):.4f}\n"
         f"Friction drop coefficient for 180° bends: {m_file.get('f_elbow_blkt_inboard_180_bend', scan=scan):.4f}\n\n"
         f"Total coolant mass flow rate: {m_file.get('mflow_blkt_inboard_coolant', scan=scan):.4f} kg/s\n"
+        f"Coolant mass flow rate in single channel: {m_file.get('mflow_blkt_inboard_coolant_channel', scan=scan):.4f} kg/s\n"
+        f"Velocity of inboard blanket coolant in single channel: {m_file.get('vel_blkt_inboard_coolant', scan=scan):.4f} m/s"
     )
 
     fig.text(
diff --git a/process/models/blankets/blanket_library.py b/process/models/blankets/blanket_library.py
index 1d138070ac..38f3865888 100644
--- a/process/models/blankets/blanket_library.py
+++ b/process/models/blankets/blanket_library.py
@@ -3404,6 +3404,20 @@ def output_outboard_blkt_pumping_variables(self):
             self.data.blanket.mflow_blkt_outboard_coolant,
             "OP ",
         )
+        po.ovarre(
+            self.outfile,
+            "Mass flow rate of outboard blanket coolant in single channel (kg/s)",
+            "(mflow_blkt_outboard_coolant_channel)",
+            self.data.blanket.mflow_blkt_outboard_coolant_channel,
+            "OP ",
+        )
+        po.ovarre(
+            self.outfile,
+            "Velocity of outboard blanket coolant in single channel (m/s)",
+            "(vel_blkt_outboard_coolant)",
+            self.data.blanket.vel_blkt_outboard_coolant,
+            "OP ",
+        )
 
     def output_inboard_blkt_pumping_variables(self):
 
@@ -3557,6 +3571,20 @@ def output_inboard_blkt_pumping_variables(self):
             self.data.blanket.mflow_blkt_inboard_coolant,
             "OP ",
         )
+        po.ovarre(
+            self.outfile,
+            "Mass flow rate of inboard blanket coolant in single channel (kg/s)",
+            "(mflow_blkt_inboard_coolant_channel)",
+            self.data.blanket.mflow_blkt_inboard_coolant_channel,
+            "OP ",
+        )
+        po.ovarre(
+            self.outfile,
+            "Velocity of inboard blanket coolant in single channel (m/s)",
+            "(vel_blkt_inboard_coolant)",
+            self.data.blanket.vel_blkt_inboard_coolant,
+            "OP ",
+        )
 
 
 class OutboardBlanket(BlanketLibrary):

From 9944ab1728e8f51f8495052c08675944aa1f9104 Mon Sep 17 00:00:00 2001
From: mn3981 <christopher.ashe@ukaea.uk>
Date: Mon, 3 Aug 2026 10:49:26 +0100
Subject: [PATCH 28/33] Post rebase fixes

---
 process/core/io/plot/summary.py            | 16 +++++++++-------
 process/models/blankets/blanket_library.py |  3 ++-
 process/models/blankets/hcpb.py            |  3 ++-
 process/models/engineering/pumping.py      | 12 ++++++++----
 4 files changed, 21 insertions(+), 13 deletions(-)

diff --git a/process/core/io/plot/summary.py b/process/core/io/plot/summary.py
index 4d6bb0ca56..614365147e 100644
--- a/process/core/io/plot/summary.py
+++ b/process/core/io/plot/summary.py
@@ -17194,13 +17194,19 @@ def _add_page(name: str | None = None):
     )
 
     plot_main_power_flow(
-        figs[36].add_subplot(111, aspect="equal"), m_file, scan, figs[36]
+        _add_page("main_power_flow").add_subplot(111, aspect="equal"),
+        m_file,
+        scan,
+        pages["main_power_flow"],
     )
 
-    ax24 = figs[37].add_subplot(111)
+    ax24 = _add_page("power_profile_over_time").add_subplot(111)
     # set_position([left, bottom, width, height]) -> height ~ 0.66 => ~2/3 of page height
     ax24.set_position([0.08, 0.35, 0.84, 0.57])
-    plot_system_power_profiles_over_time(ax24, m_file, scan, figs[37])
+    plot_system_power_profiles_over_time(
+        ax24, m_file, scan, pages["power_profile_over_time"]
+    )
+    return list(pages.values())
 
 
 def create_thickness_builds(m_file, scan: int):
@@ -17305,10 +17311,6 @@ def add_page_footer(
             color="dimgray",
         )
 
-    # create main plot
-    # Increase range when adding new page
-    pages = [plt.figure(figsize=(12, 9), dpi=80) for i in range(38)]
-
     # run main_plot
     mfile_obj = MFile(mfile) if mfile else MFile("MFILE.DAT")
     run_label = f"{mfile_obj.get('fileprefix', scan=-1)} | scan {scan or -1} | {mfile_obj.get('date', scan=-1)} {mfile_obj.get('time', scan=-1)} | {mfile_obj.get('tagno', scan=-1)} | Branch: {mfile_obj.get('branch_name', scan=-1)}  "
diff --git a/process/models/blankets/blanket_library.py b/process/models/blankets/blanket_library.py
index 38f3865888..d5349f6d11 100644
--- a/process/models/blankets/blanket_library.py
+++ b/process/models/blankets/blanket_library.py
@@ -3013,7 +3013,8 @@ def total_pressure_drop(
         nopolchan: int,
         label: str,
     ) -> tuple[float, CoolantFrictionLossParameters]:
-        """Calculate the total pressure drop (Pa) for coolant flow in the first wall (FW) and breeding blanket (BZ).
+        """Calculate the total pressure drop (Pa) for coolant flow in the first wall
+        (FW) and breeding blanket (BZ).
 
         This includes frictional losses and, for liquid breeder coolants,
         magnetohydrodynamic (MHD) losses.
diff --git a/process/models/blankets/hcpb.py b/process/models/blankets/hcpb.py
index 9c9c153bda..9b93d34317 100644
--- a/process/models/blankets/hcpb.py
+++ b/process/models/blankets/hcpb.py
@@ -871,7 +871,8 @@ def powerflow_calc(self, output: bool):
             if output:
                 po.ovarre(
                     self.outfile,
-                    "Mechanical pumping power for FW and blanket cooling loop including heat exchanger (MW)",
+                    "Mechanical pumping power for FW and blanket cooling loop including "
+                    "heat exchanger (MW)",
                     "(p_fw_blkt_coolant_pump_mw)",
                     self.data.primary_pumping.p_fw_blkt_coolant_pump_mw,
                     "OP ",
diff --git a/process/models/engineering/pumping.py b/process/models/engineering/pumping.py
index 5355ca8f36..274db14721 100644
--- a/process/models/engineering/pumping.py
+++ b/process/models/engineering/pumping.py
@@ -309,12 +309,14 @@ def coolant_pumping_power(
     etaiso: float,
     etaiso_liq: float,
 ) -> float:
-    """Calculate the coolant pumping power in MW for the first wall (FW) or breeding blanket (BZ) coolant.
+    """Calculate the coolant pumping power in MW for the first wall (FW) or breeding
+    blanket (BZ) coolant.
 
     Parameters
     ----------
     i_liquid_breeder : int
-        Switch for primary coolant or secondary coolant/breeder (1=primary He/H2O, 2=secondary PbLi/Li).
+        Switch for primary coolant or secondary coolant/breeder
+        (1=primary He/H2O, 2=secondary PbLi/Li).
     temp_coolant_pump_outlet : float
         Pump outlet temperature (K).
     temp_coolant_pump_inlet : float
@@ -365,7 +367,8 @@ def coolant_pumping_power(
         # Assume isentropic pump so that s1 = s2
         s1 = pump_outlet_fluid_properties.entropy
 
-        # Get specific enthalpy at the outlet (J/kg) before pump using pressure and entropy s1
+        # Get specific enthalpy at the outlet (J/kg) before pump using pressure and
+        # entropy s1
         pump_inlet_fluid_properties = FluidProperties.of(
             fluid_name=CoolantType(i_coolant_type).full_name,
             pressure=pres_coolant_pump_inlet,
@@ -585,7 +588,8 @@ def elbow_coeff(
         a = 0.7 + (0.35 * np.sin((deg_pipe_elbow / 90.0) * (np.pi / 180.0)))
     else:
         raise ProcessValueError(
-            "No formula for 70 <= elbow angle(deg) <= 100, only 90 deg option available in this range."
+            "No formula for 70 <= elbow angle(deg) <= 100, only 90 deg option available "
+            "in this range."
         )
 
     r_ratio = radius_pipe_elbow / dia_pipe

From 2f0d153af62c2f106c69073a3b551495030e0627 Mon Sep 17 00:00:00 2001
From: mn3981 <christopher.ashe@ukaea.uk>
Date: Mon, 3 Aug 2026 10:59:27 +0100
Subject: [PATCH 29/33] Only output pumping variables if pressure drop is
 calculated

---
 process/core/io/plot/summary.py | 13 +++++++------
 process/main.py                 | 14 +++++++++-----
 2 files changed, 16 insertions(+), 11 deletions(-)

diff --git a/process/core/io/plot/summary.py b/process/core/io/plot/summary.py
index 614365147e..70c8e18134 100644
--- a/process/core/io/plot/summary.py
+++ b/process/core/io/plot/summary.py
@@ -84,6 +84,7 @@
     PlasmaShapeModelType,
 )
 from process.models.physics.profiles import PlasmaProfileShapeType
+from process.models.power import PumpingPowerModelTypes
 from process.models.pulse import PulseTimings
 from process.models.superconductors import SuperconductorModel
 from process.models.tfcoil.base import (
@@ -16475,9 +16476,7 @@ def plot_pf_dimensions(
     axis.set_aspect("equal", adjustable="box")
 
 
-def plot_blanket_coolant_channel_structure_and_properties(
-    fig: plt.Figure, m_file: MFile, scan: int
-):
+def plot_blanket_coolant_properties(fig: plt.Figure, m_file: MFile, scan: int):
     """Combined plot of blanket coolant channel structure and properties."""
     # Add info about the Winding Pack
     textstr_outboard_blkt = (
@@ -17189,9 +17188,11 @@ def _add_page(name: str | None = None):
     )
 
     plot_blkt_pipe_bends(_add_page("blkt_cooling"), m_file, scan)
-    plot_blanket_coolant_channel_structure_and_properties(
-        pages["blkt_cooling"], m_file, scan
-    )
+    if (
+        m_file.get("i_p_coolant_pumping", scan=scan)
+        == PumpingPowerModelTypes.CALCULATE_PRESSURE_DROP
+    ):
+        plot_blanket_coolant_properties(pages["blkt_cooling"], m_file, scan)
 
     plot_main_power_flow(
         _add_page("main_power_flow").add_subplot(111, aspect="equal"),
diff --git a/process/main.py b/process/main.py
index 0f39040ca1..88fbb1eaae 100644
--- a/process/main.py
+++ b/process/main.py
@@ -101,7 +101,7 @@
 from process.models.physics.plasma_profiles import PlasmaProfile
 from process.models.physics.profiles import NeProfile, TeProfile
 from process.models.physics.scrape_off_layer import ScrapeOffLayer
-from process.models.power import Power
+from process.models.power import Power, PumpingPowerModelTypes
 from process.models.pulse import Pulse
 from process.models.shield import Shield
 from process.models.stellarator.neoclassics import Neoclassics
@@ -953,12 +953,16 @@ def write(self, data, _outfile):
             self.dcll.output()
 
         if (
-            data.build.i_blkt_inboard
-            == InboardBlanketConfiguration.INBOARD_BLANKET_PRESENT
+            data.fwbs.i_p_coolant_pumping
+            == PumpingPowerModelTypes.CALCULATE_PRESSURE_DROP
         ):
-            self.blanket_library.output_inboard_blkt_pumping_variables()
+            if (
+                data.build.i_blkt_inboard
+                == InboardBlanketConfiguration.INBOARD_BLANKET_PRESENT
+            ):
+                self.blanket_library.output_inboard_blkt_pumping_variables()
 
-        self.blanket_library.output_outboard_blkt_pumping_variables()
+            self.blanket_library.output_outboard_blkt_pumping_variables()
 
         # FISPACT and LOCA model (not used)- removed
 

From ca7110f3f593cd32f3d8fb8fd55fc01f033d7f3a Mon Sep 17 00:00:00 2001
From: mn3981 <christopher.ashe@ukaea.uk>
Date: Wed, 5 Aug 2026 10:12:33 +0100
Subject: [PATCH 30/33] Add pumping power calculation option output in first
 wall pumping details

---
 process/models/fw.py | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/process/models/fw.py b/process/models/fw.py
index 917e17b21b..2c743d051d 100644
--- a/process/models/fw.py
+++ b/process/models/fw.py
@@ -788,7 +788,13 @@ def output_fw_geometry(self):
     def output_fw_pumping(self):
         """Outputs the first wall pumping details to the output file."""
         po.oheadr(self.outfile, "First wall pumping")
-
+        po.ovarre(
+            self.outfile,
+            "Pumping power calculation option",
+            "(i_p_coolant_pumping)",
+            self.data.fwbs.i_p_coolant_pumping,
+            "OP ",
+        )
         po.ovarre(
             self.outfile,
             "First wall coolant type",

From db4707580d8720f467fe81fa9e676c507a5b4680 Mon Sep 17 00:00:00 2001
From: Christopher Ashe <91618944+chris-ashe@users.noreply.github.com>
Date: Fri, 21 Aug 2026 16:00:07 +0100
Subject: [PATCH 31/33] Update process/models/blankets/blanket_library.py

Co-authored-by: Timothy <75321887+timothy-nunn@users.noreply.github.com>
---
 process/models/blankets/blanket_library.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/process/models/blankets/blanket_library.py b/process/models/blankets/blanket_library.py
index d5349f6d11..bf671e9964 100644
--- a/process/models/blankets/blanket_library.py
+++ b/process/models/blankets/blanket_library.py
@@ -3058,7 +3058,7 @@ def total_pressure_drop(
         )
 
         # Friction - for all coolants
-        friction_params: CoolantFrictionLossParameters = coolant_friction_pressure_drop(
+        friction_params = coolant_friction_pressure_drop(
             i_ps=icoolpump,
             radius_pipe_90_deg_bend=radius_pipe_90_deg_bend,
             radius_pipe_180_deg_bend=radius_pipe_180_deg_bend,

From 94feec424447abb925f2de2059988c0d6ba6c63c Mon Sep 17 00:00:00 2001
From: mn3981 <christopher.ashe@ukaea.uk>
Date: Tue, 25 Aug 2026 13:49:18 +0100
Subject: [PATCH 32/33] Refactor blanket models to use pipe_hydraulic_diameter
 function and add docstring improvements

---
 process/models/blankets/blanket_library.py |  9 +++++----
 process/models/blankets/dcll.py            |  5 ++++-
 process/models/engineering/pumping.py      | 16 ++++++++++++++++
 3 files changed, 25 insertions(+), 5 deletions(-)

diff --git a/process/models/blankets/blanket_library.py b/process/models/blankets/blanket_library.py
index bf671e9964..106aae93c3 100644
--- a/process/models/blankets/blanket_library.py
+++ b/process/models/blankets/blanket_library.py
@@ -26,6 +26,7 @@
     calculate_required_mass_flow_rate,
     coolant_friction_pressure_drop,
     coolant_pumping_power,
+    pipe_hydraulic_diameter,
 )
 from process.models.fw import N_FW_PIPE_90_DEG_BENDS, N_FW_PIPE_180_DEG_BENDS
 from process.models.power import PumpingPowerModelTypes
@@ -3255,7 +3256,7 @@ def liquid_breeder_mhd_pressure_drop(
         return liquid_breeder_pressure_drop_mhd
 
     def output_outboard_blkt_pumping_variables(self):
-
+        """Output the outboard blanket pumping variables to the output file."""
         po.oheadr(self.outfile, "Outboard Blanket pumping variables")
 
         po.ovarre(
@@ -3421,7 +3422,7 @@ def output_outboard_blkt_pumping_variables(self):
         )
 
     def output_inboard_blkt_pumping_variables(self):
-
+        """Output the inboard blanket pumping variables to the output file."""
         po.oheadr(self.outfile, "Inboard Blanket pumping variables")
 
         po.ovarre(
@@ -3595,7 +3596,7 @@ def calculate_basic_geometry(self):
         """Calculate basic outboard blanket geometry"""
         self.component_volumes()
 
-        dia_blkt_channel = self.pipe_hydraulic_diameter(
+        dia_blkt_channel = pipe_hydraulic_diameter(
             i_channel_shape=1,
             radius_fw_channel=self.data.fwbs.radius_fw_channel,
             a_bz_liq=self.data.fwbs.a_bz_liq,
@@ -3731,7 +3732,7 @@ def calculate_basic_geometry(self):
         """Calculate basic inboard blanket geometry"""
         self.component_volumes()
 
-        dia_blkt_channel = self.pipe_hydraulic_diameter(
+        dia_blkt_channel = pipe_hydraulic_diameter(
             i_channel_shape=1,
             radius_fw_channel=self.data.fwbs.radius_fw_channel,
             a_bz_liq=self.data.fwbs.a_bz_liq,
diff --git a/process/models/blankets/dcll.py b/process/models/blankets/dcll.py
index 9bdb454a6d..e2cfa26c7c 100644
--- a/process/models/blankets/dcll.py
+++ b/process/models/blankets/dcll.py
@@ -10,6 +10,9 @@
     calculate_pipe_bend_radius,
     pumping_powers_as_fractions,
 )
+from process.models.engineering.pumping import (
+    pipe_hydraulic_diameter,
+)
 from process.models.power import PumpingPowerModelTypes
 
 
@@ -126,7 +129,7 @@ def run(self, output: bool = False):
             self.data.blanket.deg_blkt_inboard_poloidal_plasma / 360.0
         )
 
-        dia_blkt_channel = self.pipe_hydraulic_diameter(
+        dia_blkt_channel = pipe_hydraulic_diameter(
             i_channel_shape=1,
             radius_fw_channel=self.data.fwbs.radius_fw_channel,
             a_bz_liq=self.data.fwbs.a_bz_liq,
diff --git a/process/models/engineering/pumping.py b/process/models/engineering/pumping.py
index 274db14721..07622a963f 100644
--- a/process/models/engineering/pumping.py
+++ b/process/models/engineering/pumping.py
@@ -249,6 +249,11 @@ def pipe_hydraulic_diameter(
     i_channel_shape :
         switch for circular or rectangular channel crossection.
         Shape depends on whether primary or secondary coolant
+
+    Raises
+    ------
+    ProcessValueError
+        If i_channel_shape is not 1 or 2.
     """
     # If primary coolant then circular channels assumed
     if i_channel_shape == 1:
@@ -341,6 +346,11 @@ def coolant_pumping_power(
     float
         Pumping power in MW.
 
+    Raises
+    ------
+    ProcessValueError
+        If the pressure drops in the coolant are too large to be feasible.
+
     References
     ----------
         - Idel'Cik, I. E. (1969), Memento des pertes de charge
@@ -575,6 +585,12 @@ def elbow_coeff(
     float
         Elbow coefficient for pressure drop calculation
 
+    Raises
+    ------
+    ProcessValueError
+        If deg_pipe_elbow is between 70 and 100 degrees, as no formula is
+        available for this range.
+
     References
     ----------
     [1] Idel'Cik, I. E. (1969), Memento des pertes de charge,

From 01352c58fce2421e3fd7bbfdb8ad683c6a7d8d24 Mon Sep 17 00:00:00 2001
From: mn3981 <christopher.ashe@ukaea.uk>
Date: Tue, 25 Aug 2026 13:50:37 +0100
Subject: [PATCH 33/33] Remove unnecessary @staticmethod decorators from
 calculate_reynolds_number and elbow_coeff functions

---
 process/models/engineering/pumping.py | 2 --
 1 file changed, 2 deletions(-)

diff --git a/process/models/engineering/pumping.py b/process/models/engineering/pumping.py
index 07622a963f..7ac326cfb1 100644
--- a/process/models/engineering/pumping.py
+++ b/process/models/engineering/pumping.py
@@ -527,7 +527,6 @@ def gnielinski_heat_transfer_coefficient(
     return heat_transfer_coefficient
 
 
-@staticmethod
 def calculate_reynolds_number(
     den_coolant: float,
     vel_coolant: float,
@@ -560,7 +559,6 @@ def calculate_reynolds_number(
     return den_coolant * vel_coolant * diameter / visc_coolant
 
 
-@staticmethod
 def elbow_coeff(
     radius_pipe_elbow: float,
     deg_pipe_elbow: float,