Update fluid volumes after prescribed axial expansion

armi/reactor/converters/axialExpansionChanger.py

@@ -16,11 +16,12 @@
 from statistics import mean
 from typing import List
 
+from numpy import array
+
 from armi import runLog
 from armi.materials import material
 from armi.reactor.components import UnshapedComponent
 from armi.reactor.flags import Flags
-from numpy import array
 
 TARGET_FLAGS_IN_PREFERRED_ORDER = [
     Flags.FUEL,
@@ -364,8 +365,8 @@ def axiallyExpandAssembly(self):
 
             _checkBlockHeight(b)
             # Call Component.clearCache to update the Component volume, and therefore the masses,
-            # of all solid components.
-            for c in getSolidComponents(b):
+            # of all components.
+            for c in b:
                 c.clearCache()
             # redo mesh -- functionality based on assembly.calculateZCoords()
             mesh.append(b.p.ztop)

armi/reactor/converters/tests/test_axialExpansionChanger.py

@@ -18,6 +18,8 @@
 import unittest
 from statistics import mean
 
+from numpy import array, linspace, zeros
+
 from armi import materials
 from armi.materials import _MATERIAL_NAMESPACE_ORDER, custom
 from armi.reactor.assemblies import HexAssembly, grids
@@ -35,7 +37,6 @@
 from armi.reactor.tests.test_reactors import loadTestReactor, reduceTestReactorRings
 from armi.tests import TEST_ROOT
 from armi.utils import units
-from numpy import array, linspace, zeros
 
 
 class AxialExpansionTestBase(unittest.TestCase):
@@ -448,6 +449,10 @@ def test_noMovementACLP(self):
         .. test:: Ensure the ACLP does not move during fuel-only expansion.
             :id: T_ARMI_AXIAL_EXP_PRESC1
             :tests: R_ARMI_AXIAL_EXP_PRESC
+
+        .. test:: Ensure the component volumes are correctly updated during prescribed expansion.
+            :id: T_ARMI_AXIAL_EXP_PRESC1
+            :tests: R_ARMI_AXIAL_EXP_PRESC
         """
         # build test assembly with ACLP
         assembly = HexAssembly("testAssemblyType")
@@ -490,6 +495,15 @@ def test_noMovementACLP(self):
             msg="ACLP ztop has changed. It should not with fuel component only expansion!",
         )
 
+        # verify that the component volumes are correctly updated
+        for b in assembly:
+            for c in b:
+                self.assertAlmostEqual(
+                    c.getArea() * b.getHeight(),
+                    c.getVolume(),
+                    places=12,
+                )
+
     def test_reset(self):
         self.obj.setAssembly(self.a)
         self.obj.reset()