Improving HexBlock.getFlowArea

armi/reactor/blocks.py

@@ -2593,7 +2593,11 @@ def getFlowArea(self):
             Retrieving the flow area requires that there be a single coolant Component.
             If available, the area is calculated (:need:`I_ARMI_COMP_VOL0`).
         """
-        return self.getComponent(Flags.COOLANT, exact=True).getArea()
+        area = self.getComponent(Flags.COOLANT, exact=True).getArea()
+        for c in self.getComponents(Flags.INTERDUCTCOOLANT, exact=True):
+            area += c.getArea()
+
+        return area
 
     def getHydraulicDiameter(self):
         r"""

armi/reactor/tests/test_blocks.py

@@ -937,9 +937,33 @@ def test_getFlowAreaPerPin(self):
         self.assertAlmostEqual(cur, ref)
 
     def test_getFlowArea(self):
-        area = self.block.getComponent(Flags.COOLANT).getArea()
+        """Test Block.getFlowArea() for a Block with just coolant."""
+        ref = self.block.getComponent(Flags.COOLANT).getArea()
         cur = self.block.getFlowArea()
-        ref = area
+        self.assertAlmostEqual(cur, ref)
+
+    def test_getFlowAreaInterDuctCoolant(self):
+        """Test Block.getFlowArea() for a Block with coolant and interductcoolant."""
+        # build a test block with a Hex inter duct collant
+        fuelDims = {"Tinput": 400, "Thot": 400, "od": 0.76, "id": 0.00, "mult": 127.0}
+        ductDims = {"Tinput": 400, "Thot": 400, "op": 16, "ip": 15.3, "mult": 1.0}
+        coolDims = {"Tinput": 400, "Thot": 400}
+        iCoolantDims = {"Tinput": 400, "Thot": 400, "op": 17.0, "ip": 16, "mult": 1.0}
+
+        fuel = components.Circle("fuel", "UZr", **fuelDims)
+        duct = components.Hexagon("inner duct", "HT9", **ductDims)
+        coolant = components.DerivedShape("coolant", "Sodium", **coolDims)
+        iCoolant = components.Hexagon("interductcoolant", "Sodium", **iCoolantDims)
+
+        b = blocks.HexBlock("fuel", height=10.0)
+        b.add(fuel)
+        b.add(coolant)
+        b.add(duct)
+        b.add(iCoolant)
+
+        ref = b.getComponent(Flags.COOLANT).getArea()
+        ref += b.getComponent(Flags.INTERDUCTCOOLANT).getArea()
+        cur = b.getFlowArea()
         self.assertAlmostEqual(cur, ref)
 
     def test_getHydraulicDiameter(self):