Fix reference temp for Zr thermal expansion.

terrapower · Aug 22, 2022 · 4656386 · 4656386
1 parent 8d114bb
commit 4656386
Show file tree

Hide file tree

Showing 3 changed files with 5 additions and 5 deletions.
diff --git a/armi/materials/zr.py b/armi/materials/zr.py
@@ -79,7 +79,7 @@ class Zr(Material):
 
     def __init__(self):
         Material.__init__(self)
-        referenceTemp = 298.15
+        referenceTemp = 291.62
         referenceDensity = self._computeReferenceDensity(Tk=referenceTemp)
         self.p.refTempK = referenceTemp
         self.p.refDens = referenceDensity
@@ -130,7 +130,7 @@ def linearExpansionPercent(self, Tk=None, Tc=None):
         Tk = getTk(Tc, Tk)
         self.checkPropertyTempRange("linear expansion percent", Tk)
 
-        if Tk >= 293 and Tk < 1137:
+        if Tk >= self.p.refTempK and Tk < 1137:
             return (
                 -0.111 + (2.325e-4 * Tk) + (5.595e-7 * Tk ** 2) - (1.768e-10 * Tk ** 3)
             )

diff --git a/armi/reactor/converters/tests/test_axialExpansionChanger.py b/armi/reactor/converters/tests/test_axialExpansionChanger.py
@@ -834,7 +834,7 @@ def test_coldAssemblyExpansion(self):
                                 self.assertAlmostEqual(
                                     cExp.material.density3(Tc=cExp.temperatureInC),
                                     cExp.getMassDensity(),
-                                    places=4,
+                                    places=7,
                                     msg=f"{cExp} {cExp.material} in {bExp} was not at correct density, expansion = {bExp.p.height / bStd.p.height}",
                                 )
 

diff --git a/armi/tests/detailedAxialExpansion/refSmallReactorBase.yaml b/armi/tests/detailedAxialExpansion/refSmallReactorBase.yaml
@@ -251,7 +251,7 @@ blocks:
         fuel:
             shape: Circle
             material: UZr
-            Tinput: 25.0
+            Tinput: 45.187
             Thot: 600.0
             id: 0.0
             isotopics: PuUZr
@@ -311,7 +311,7 @@ blocks:
         outer liner:
             shape: Circle
             material: Zr
-            Tinput: 19.85
+            Tinput: 18.474
             Thot: 430.0
             id: 0.898
             mult: fuel.mult