Added ZrH as the top reflector of the test_salphabeta_multiple test in order to include an S(a,b) library which can be applied to multiple problems in our test suite.

tests/test_salphabeta_multiple/geometry.xml

@@ -44,9 +44,11 @@
   <surface id="33" type="z-cylinder" coeffs="0 0 5.995" />
 
 
-  <!-- Beryllium Reflector -->
+  <!-- Bottom Beryllium Reflector -->
   <cell id="1"  material="2" surfaces=" 1  -2 -30" />
-  <cell id="2"  material="2" surfaces="28 -29 -30" />
+
+  <!-- Top ZrH Reflector -->
+  <cell id="2"  material="7" surfaces="28 -29 -30" />
 
   <!-- Duralumin base and top -->
   <cell id="3"  material="4" surfaces=" 2  -4 -30  31" />

tests/test_salphabeta_multiple/materials.xml

@@ -1,7 +1,8 @@
 <?xml version="1.0"?>
 <materials>
 
-  <!-- pu-met-fast-021 case 2 -->
+  <!-- pu-met-fast-021 case 2, modified to include Zr-H to exercise
+       the capability to assign a single S(a,b) table to multiple nuclides -->
 
   <default_xs>70c</default_xs>
 
@@ -111,4 +112,19 @@
     <nuclide name="Cu-65" ao="2.2809e-04" />
   </material>
 
+  <!-- Additional ZrH to replace one of the BeO reflectors -->
+  <material id="7">
+    <density value="5.90168" units="g/cm3" />
+    <nuclide name="H-1"    ao="0.3" />
+    <nuclide name="Zr-90"  ao="0.15" />
+    <nuclide name="Zr-91"  ao="0.1" />
+    <nuclide name="Zr-92"  ao="0.1" />
+    <nuclide name="Zr-94"  ao="0.05" />
+    <nuclide name="Zr-96"  ao="0.05" />
+    <nuclide name="U-235"  ao="0.1" />
+    <nuclide name="U-238"  ao="0.15" />
+    <sab name="h/zr" xs="10t" />
+    <sab name="zr/h" xs="10t" />
+  </material>
+
 </materials>

tests/test_salphabeta_multiple/results_true.dat

@@ -1,2 +1,2 @@
 k-combined:
-1.013747E+00 3.067630E-02
+9.761880E-01 9.170415E-03