diff --git a/tests/test_basic/materials.xml b/tests/test_basic/materials.xml
index 1f85510e0..315c0fa84 100644
--- a/tests/test_basic/materials.xml
+++ b/tests/test_basic/materials.xml
@@ -3,7 +3,7 @@
 
   <material id="1">
     <density value="4.5" units="g/cc" />
-    <nuclide name="U-235" xs="70c" ao="1.0" />
+    <nuclide name="U-235" xs="71c" ao="1.0" />
   </material>
 
 </materials>
diff --git a/tests/test_cmfd_feed/materials.xml b/tests/test_cmfd_feed/materials.xml
index 496774661..7b4baf9e1 100644
--- a/tests/test_cmfd_feed/materials.xml
+++ b/tests/test_cmfd_feed/materials.xml
@@ -4,9 +4,9 @@
 <!-- Definition of materials -->
   <material id="1">
     <density value="19" units="g/cc" />
-    <nuclide name="U-235" xs="70c" wo="0.21" />
-    <nuclide name="U-238" xs="70c" wo="0.68" />
-    <nuclide name="O-16" xs="70c" wo="0.11" />
+    <nuclide name="U-235" xs="71c" wo="0.21" />
+    <nuclide name="U-238" xs="71c" wo="0.68" />
+    <nuclide name="O-16" xs="71c" wo="0.11" />
   </material>
 
 </materials>
diff --git a/tests/test_cmfd_jfnk/materials.xml b/tests/test_cmfd_jfnk/materials.xml
index 496774661..7b4baf9e1 100644
--- a/tests/test_cmfd_jfnk/materials.xml
+++ b/tests/test_cmfd_jfnk/materials.xml
@@ -4,9 +4,9 @@
 <!-- Definition of materials -->
   <material id="1">
     <density value="19" units="g/cc" />
-    <nuclide name="U-235" xs="70c" wo="0.21" />
-    <nuclide name="U-238" xs="70c" wo="0.68" />
-    <nuclide name="O-16" xs="70c" wo="0.11" />
+    <nuclide name="U-235" xs="71c" wo="0.21" />
+    <nuclide name="U-238" xs="71c" wo="0.68" />
+    <nuclide name="O-16" xs="71c" wo="0.11" />
   </material>
 
 </materials>
diff --git a/tests/test_cmfd_nofeed/materials.xml b/tests/test_cmfd_nofeed/materials.xml
index 496774661..7b4baf9e1 100644
--- a/tests/test_cmfd_nofeed/materials.xml
+++ b/tests/test_cmfd_nofeed/materials.xml
@@ -4,9 +4,9 @@
 <!-- Definition of materials -->
   <material id="1">
     <density value="19" units="g/cc" />
-    <nuclide name="U-235" xs="70c" wo="0.21" />
-    <nuclide name="U-238" xs="70c" wo="0.68" />
-    <nuclide name="O-16" xs="70c" wo="0.11" />
+    <nuclide name="U-235" xs="71c" wo="0.21" />
+    <nuclide name="U-238" xs="71c" wo="0.68" />
+    <nuclide name="O-16" xs="71c" wo="0.11" />
   </material>
 
 </materials>
diff --git a/tests/test_confidence_intervals/materials.xml b/tests/test_confidence_intervals/materials.xml
index 1f85510e0..315c0fa84 100644
--- a/tests/test_confidence_intervals/materials.xml
+++ b/tests/test_confidence_intervals/materials.xml
@@ -3,7 +3,7 @@
 
   <material id="1">
     <density value="4.5" units="g/cc" />
-    <nuclide name="U-235" xs="70c" ao="1.0" />
+    <nuclide name="U-235" xs="71c" ao="1.0" />
   </material>
 
 </materials>
diff --git a/tests/test_density_atombcm/materials.xml b/tests/test_density_atombcm/materials.xml
index f2b261f22..10d051968 100644
--- a/tests/test_density_atombcm/materials.xml
+++ b/tests/test_density_atombcm/materials.xml
@@ -3,7 +3,7 @@
 
   <material id="1">
     <density value="0.1" units="atom/b-cm" />
-    <nuclide name="U-235" xs="70c" ao="1.0" />
+    <nuclide name="U-235" xs="71c" ao="1.0" />
   </material>
 
 </materials>
diff --git a/tests/test_density_atomcm3/materials.xml b/tests/test_density_atomcm3/materials.xml
index 128093956..57d177afc 100644
--- a/tests/test_density_atomcm3/materials.xml
+++ b/tests/test_density_atomcm3/materials.xml
@@ -3,7 +3,7 @@
 
   <material id="1">
     <density value="4.5e22" units="atom/cm3" />
-    <nuclide name="U-235" xs="70c" ao="1.0" />
+    <nuclide name="U-235" xs="71c" ao="1.0" />
   </material>
 
 </materials>
diff --git a/tests/test_density_kgm3/materials.xml b/tests/test_density_kgm3/materials.xml
index 8ace9afae..2f74574e7 100644
--- a/tests/test_density_kgm3/materials.xml
+++ b/tests/test_density_kgm3/materials.xml
@@ -3,7 +3,7 @@
 
   <material id="1">
     <density value="12.3e3" units="kg/m3" />
-    <nuclide name="U-235" xs="70c" ao="1.0" />
+    <nuclide name="U-235" xs="71c" ao="1.0" />
   </material>
 
 </materials>
diff --git a/tests/test_density_sum/materials.xml b/tests/test_density_sum/materials.xml
index bd04d0b66..713661196 100644
--- a/tests/test_density_sum/materials.xml
+++ b/tests/test_density_sum/materials.xml
@@ -3,9 +3,9 @@
 
   <material id="1">
     <density units="sum" />
-    <nuclide name="U-235" xs="70c" ao="0.3e-2" />
-    <nuclide name="U-238" xs="70c" ao="0.5e-1" />
-    <nuclide name="H-1" xs="70c" ao="0.1e-2" />
+    <nuclide name="U-235" xs="71c" ao="0.3e-2" />
+    <nuclide name="U-238" xs="71c" ao="0.5e-1" />
+    <nuclide name="H-1" xs="71c" ao="0.1e-2" />
   </material>
 
 </materials>
diff --git a/tests/test_eigenvalue_genperbatch/materials.xml b/tests/test_eigenvalue_genperbatch/materials.xml
index 1f85510e0..315c0fa84 100644
--- a/tests/test_eigenvalue_genperbatch/materials.xml
+++ b/tests/test_eigenvalue_genperbatch/materials.xml
@@ -3,7 +3,7 @@
 
   <material id="1">
     <density value="4.5" units="g/cc" />
-    <nuclide name="U-235" xs="70c" ao="1.0" />
+    <nuclide name="U-235" xs="71c" ao="1.0" />
   </material>
 
 </materials>
diff --git a/tests/test_eigenvalue_no_inactive/materials.xml b/tests/test_eigenvalue_no_inactive/materials.xml
index 1f85510e0..315c0fa84 100644
--- a/tests/test_eigenvalue_no_inactive/materials.xml
+++ b/tests/test_eigenvalue_no_inactive/materials.xml
@@ -3,7 +3,7 @@
 
   <material id="1">
     <density value="4.5" units="g/cc" />
-    <nuclide name="U-235" xs="70c" ao="1.0" />
+    <nuclide name="U-235" xs="71c" ao="1.0" />
   </material>
 
 </materials>
diff --git a/tests/test_energy_grid/materials.xml b/tests/test_energy_grid/materials.xml
index 06a28e1a9..45ccc6554 100644
--- a/tests/test_energy_grid/materials.xml
+++ b/tests/test_energy_grid/materials.xml
@@ -3,9 +3,9 @@
 
   <material id="1">
     <density value="4.5" units="g/cc" />
-    <nuclide name="U-235" xs="70c" ao="1.0" />
-    <nuclide name="H-1" xs="70c" ao="0.5" />
-    <nuclide name="C-Nat" xs="70c" ao="0.5" />
+    <nuclide name="U-235" xs="71c" ao="1.0" />
+    <nuclide name="H-1" xs="71c" ao="0.5" />
+    <nuclide name="C-Nat" xs="71c" ao="0.5" />
   </material>
 
 </materials>
diff --git a/tests/test_entropy/materials.xml b/tests/test_entropy/materials.xml
index 1f85510e0..315c0fa84 100644
--- a/tests/test_entropy/materials.xml
+++ b/tests/test_entropy/materials.xml
@@ -3,7 +3,7 @@
 
   <material id="1">
     <density value="4.5" units="g/cc" />
-    <nuclide name="U-235" xs="70c" ao="1.0" />
+    <nuclide name="U-235" xs="71c" ao="1.0" />
   </material>
 
 </materials>
diff --git a/tests/test_filter_cell/materials.xml b/tests/test_filter_cell/materials.xml
index fca25cc87..845fdf190 100644
--- a/tests/test_filter_cell/materials.xml
+++ b/tests/test_filter_cell/materials.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <materials>
 
-  <default_xs>70c</default_xs>
+  <default_xs>71c</default_xs>
 
   <!-- Fuel composition -->
   <material id="1">
diff --git a/tests/test_filter_cellborn/materials.xml b/tests/test_filter_cellborn/materials.xml
index fca25cc87..845fdf190 100644
--- a/tests/test_filter_cellborn/materials.xml
+++ b/tests/test_filter_cellborn/materials.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <materials>
 
-  <default_xs>70c</default_xs>
+  <default_xs>71c</default_xs>
 
   <!-- Fuel composition -->
   <material id="1">
diff --git a/tests/test_filter_energy/materials.xml b/tests/test_filter_energy/materials.xml
index fca25cc87..845fdf190 100644
--- a/tests/test_filter_energy/materials.xml
+++ b/tests/test_filter_energy/materials.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <materials>
 
-  <default_xs>70c</default_xs>
+  <default_xs>71c</default_xs>
 
   <!-- Fuel composition -->
   <material id="1">
diff --git a/tests/test_filter_energyout/materials.xml b/tests/test_filter_energyout/materials.xml
index fca25cc87..845fdf190 100644
--- a/tests/test_filter_energyout/materials.xml
+++ b/tests/test_filter_energyout/materials.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <materials>
 
-  <default_xs>70c</default_xs>
+  <default_xs>71c</default_xs>
 
   <!-- Fuel composition -->
   <material id="1">
diff --git a/tests/test_filter_group_transfer/materials.xml b/tests/test_filter_group_transfer/materials.xml
index fca25cc87..845fdf190 100644
--- a/tests/test_filter_group_transfer/materials.xml
+++ b/tests/test_filter_group_transfer/materials.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <materials>
 
-  <default_xs>70c</default_xs>
+  <default_xs>71c</default_xs>
 
   <!-- Fuel composition -->
   <material id="1">
diff --git a/tests/test_filter_material/materials.xml b/tests/test_filter_material/materials.xml
index fca25cc87..845fdf190 100644
--- a/tests/test_filter_material/materials.xml
+++ b/tests/test_filter_material/materials.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <materials>
 
-  <default_xs>70c</default_xs>
+  <default_xs>71c</default_xs>
 
   <!-- Fuel composition -->
   <material id="1">
diff --git a/tests/test_filter_mesh_2d/materials.xml b/tests/test_filter_mesh_2d/materials.xml
index fca25cc87..845fdf190 100644
--- a/tests/test_filter_mesh_2d/materials.xml
+++ b/tests/test_filter_mesh_2d/materials.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <materials>
 
-  <default_xs>70c</default_xs>
+  <default_xs>71c</default_xs>
 
   <!-- Fuel composition -->
   <material id="1">
diff --git a/tests/test_filter_mesh_3d/materials.xml b/tests/test_filter_mesh_3d/materials.xml
index fca25cc87..845fdf190 100644
--- a/tests/test_filter_mesh_3d/materials.xml
+++ b/tests/test_filter_mesh_3d/materials.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <materials>
 
-  <default_xs>70c</default_xs>
+  <default_xs>71c</default_xs>
 
   <!-- Fuel composition -->
   <material id="1">
diff --git a/tests/test_filter_universe/materials.xml b/tests/test_filter_universe/materials.xml
index fca25cc87..845fdf190 100644
--- a/tests/test_filter_universe/materials.xml
+++ b/tests/test_filter_universe/materials.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <materials>
 
-  <default_xs>70c</default_xs>
+  <default_xs>71c</default_xs>
 
   <!-- Fuel composition -->
   <material id="1">
diff --git a/tests/test_fixed_source/materials.xml b/tests/test_fixed_source/materials.xml
index 2913b2182..5242021d3 100644
--- a/tests/test_fixed_source/materials.xml
+++ b/tests/test_fixed_source/materials.xml
@@ -3,7 +3,7 @@
 
   <material id="1">
     <density value="7.5" units="g/cc" />
-    <nuclide name="O-16" xs="70c" ao="1.0" />
+    <nuclide name="O-16" xs="71c" ao="1.0" />
   </material>
 
 </materials>
diff --git a/tests/test_lattice/materials.xml b/tests/test_lattice/materials.xml
index 7ef015678..97c60eaad 100644
--- a/tests/test_lattice/materials.xml
+++ b/tests/test_lattice/materials.xml
@@ -10,7 +10,7 @@
   ===============================================================
   -->
 
-  <default_xs>70c</default_xs>  
+  <default_xs>71c</default_xs>  
 
   <!-- UO2-PuO2 Mixture -->
   <material id="1">
diff --git a/tests/test_lattice_multiple/materials.xml b/tests/test_lattice_multiple/materials.xml
index fca25cc87..845fdf190 100644
--- a/tests/test_lattice_multiple/materials.xml
+++ b/tests/test_lattice_multiple/materials.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <materials>
 
-  <default_xs>70c</default_xs>
+  <default_xs>71c</default_xs>
 
   <!-- Fuel composition -->
   <material id="1">
diff --git a/tests/test_natural_element/materials.xml b/tests/test_natural_element/materials.xml
index 109bd9c95..5a3b3bbc6 100644
--- a/tests/test_natural_element/materials.xml
+++ b/tests/test_natural_element/materials.xml
@@ -3,7 +3,7 @@
 
   <!-- pu-met-fast-021 case 2 -->
 
-  <default_xs>70c</default_xs>
+  <default_xs>71c</default_xs>
 
   <!-- Plutonium -->
   <material id="1">
diff --git a/tests/test_output/materials.xml b/tests/test_output/materials.xml
index 1f85510e0..315c0fa84 100644
--- a/tests/test_output/materials.xml
+++ b/tests/test_output/materials.xml
@@ -3,7 +3,7 @@
 
   <material id="1">
     <density value="4.5" units="g/cc" />
-    <nuclide name="U-235" xs="70c" ao="1.0" />
+    <nuclide name="U-235" xs="71c" ao="1.0" />
   </material>
 
 </materials>
diff --git a/tests/test_particle_restart/materials.xml b/tests/test_particle_restart/materials.xml
index 003e8ebc9..1fd2fb1c7 100644
--- a/tests/test_particle_restart/materials.xml
+++ b/tests/test_particle_restart/materials.xml
@@ -3,7 +3,7 @@
 
   <material id="1">
     <density value="20.0" units="g/cc" />
-    <nuclide name="U-235" xs="70c" ao="1.0" />
+    <nuclide name="U-235" xs="71c" ao="1.0" />
   </material>
 
 </materials>
diff --git a/tests/test_plot_background/materials.xml b/tests/test_plot_background/materials.xml
index 1f85510e0..315c0fa84 100644
--- a/tests/test_plot_background/materials.xml
+++ b/tests/test_plot_background/materials.xml
@@ -3,7 +3,7 @@
 
   <material id="1">
     <density value="4.5" units="g/cc" />
-    <nuclide name="U-235" xs="70c" ao="1.0" />
+    <nuclide name="U-235" xs="71c" ao="1.0" />
   </material>
 
 </materials>
diff --git a/tests/test_plot_basis/materials.xml b/tests/test_plot_basis/materials.xml
index 1141d81f7..f90a5e7f8 100644
--- a/tests/test_plot_basis/materials.xml
+++ b/tests/test_plot_basis/materials.xml
@@ -3,17 +3,17 @@
 
   <material id="1">
     <density value="4.5" units="g/cc" />
-    <nuclide name="U-235" xs="70c" ao="1.0" />
+    <nuclide name="U-235" xs="71c" ao="1.0" />
   </material>
 
   <material id="2">
     <density value="4.5" units="g/cc" />
-    <nuclide name="U-235" xs="70c" ao="1.0" />
+    <nuclide name="U-235" xs="71c" ao="1.0" />
   </material>
 
   <material id="3">
     <density value="4.5" units="g/cc" />
-    <nuclide name="U-235" xs="70c" ao="1.0" />
+    <nuclide name="U-235" xs="71c" ao="1.0" />
   </material>
 
 </materials>
diff --git a/tests/test_plot_colspec/materials.xml b/tests/test_plot_colspec/materials.xml
index 1f85510e0..315c0fa84 100644
--- a/tests/test_plot_colspec/materials.xml
+++ b/tests/test_plot_colspec/materials.xml
@@ -3,7 +3,7 @@
 
   <material id="1">
     <density value="4.5" units="g/cc" />
-    <nuclide name="U-235" xs="70c" ao="1.0" />
+    <nuclide name="U-235" xs="71c" ao="1.0" />
   </material>
 
 </materials>
diff --git a/tests/test_plot_mask/materials.xml b/tests/test_plot_mask/materials.xml
index 1141d81f7..f90a5e7f8 100644
--- a/tests/test_plot_mask/materials.xml
+++ b/tests/test_plot_mask/materials.xml
@@ -3,17 +3,17 @@
 
   <material id="1">
     <density value="4.5" units="g/cc" />
-    <nuclide name="U-235" xs="70c" ao="1.0" />
+    <nuclide name="U-235" xs="71c" ao="1.0" />
   </material>
 
   <material id="2">
     <density value="4.5" units="g/cc" />
-    <nuclide name="U-235" xs="70c" ao="1.0" />
+    <nuclide name="U-235" xs="71c" ao="1.0" />
   </material>
 
   <material id="3">
     <density value="4.5" units="g/cc" />
-    <nuclide name="U-235" xs="70c" ao="1.0" />
+    <nuclide name="U-235" xs="71c" ao="1.0" />
   </material>
 
 </materials>
diff --git a/tests/test_ptables_off/materials.xml b/tests/test_ptables_off/materials.xml
index 1f85510e0..315c0fa84 100644
--- a/tests/test_ptables_off/materials.xml
+++ b/tests/test_ptables_off/materials.xml
@@ -3,7 +3,7 @@
 
   <material id="1">
     <density value="4.5" units="g/cc" />
-    <nuclide name="U-235" xs="70c" ao="1.0" />
+    <nuclide name="U-235" xs="71c" ao="1.0" />
   </material>
 
 </materials>
diff --git a/tests/test_reflective_cone/materials.xml b/tests/test_reflective_cone/materials.xml
index 1f85510e0..315c0fa84 100644
--- a/tests/test_reflective_cone/materials.xml
+++ b/tests/test_reflective_cone/materials.xml
@@ -3,7 +3,7 @@
 
   <material id="1">
     <density value="4.5" units="g/cc" />
-    <nuclide name="U-235" xs="70c" ao="1.0" />
+    <nuclide name="U-235" xs="71c" ao="1.0" />
   </material>
 
 </materials>
diff --git a/tests/test_reflective_cylinder/materials.xml b/tests/test_reflective_cylinder/materials.xml
index 1f85510e0..315c0fa84 100644
--- a/tests/test_reflective_cylinder/materials.xml
+++ b/tests/test_reflective_cylinder/materials.xml
@@ -3,7 +3,7 @@
 
   <material id="1">
     <density value="4.5" units="g/cc" />
-    <nuclide name="U-235" xs="70c" ao="1.0" />
+    <nuclide name="U-235" xs="71c" ao="1.0" />
   </material>
 
 </materials>
diff --git a/tests/test_reflective_plane/materials.xml b/tests/test_reflective_plane/materials.xml
index 1f85510e0..315c0fa84 100644
--- a/tests/test_reflective_plane/materials.xml
+++ b/tests/test_reflective_plane/materials.xml
@@ -3,7 +3,7 @@
 
   <material id="1">
     <density value="4.5" units="g/cc" />
-    <nuclide name="U-235" xs="70c" ao="1.0" />
+    <nuclide name="U-235" xs="71c" ao="1.0" />
   </material>
 
 </materials>
diff --git a/tests/test_reflective_sphere/materials.xml b/tests/test_reflective_sphere/materials.xml
index 1f85510e0..315c0fa84 100644
--- a/tests/test_reflective_sphere/materials.xml
+++ b/tests/test_reflective_sphere/materials.xml
@@ -3,7 +3,7 @@
 
   <material id="1">
     <density value="4.5" units="g/cc" />
-    <nuclide name="U-235" xs="70c" ao="1.0" />
+    <nuclide name="U-235" xs="71c" ao="1.0" />
   </material>
 
 </materials>
diff --git a/tests/test_rotation/materials.xml b/tests/test_rotation/materials.xml
index 1f85510e0..315c0fa84 100644
--- a/tests/test_rotation/materials.xml
+++ b/tests/test_rotation/materials.xml
@@ -3,7 +3,7 @@
 
   <material id="1">
     <density value="4.5" units="g/cc" />
-    <nuclide name="U-235" xs="70c" ao="1.0" />
+    <nuclide name="U-235" xs="71c" ao="1.0" />
   </material>
 
 </materials>
diff --git a/tests/test_salphabeta/materials.xml b/tests/test_salphabeta/materials.xml
index 031fe574b..a39e4c938 100644
--- a/tests/test_salphabeta/materials.xml
+++ b/tests/test_salphabeta/materials.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <materials>
 
-  <default_xs>70c</default_xs>
+  <default_xs>71c</default_xs>
 
   <material id="1">
     <density value="4.5" units="g/cc" />
diff --git a/tests/test_salphabeta_multiple/materials.xml b/tests/test_salphabeta_multiple/materials.xml
index 6e975bde9..3df213aae 100644
--- a/tests/test_salphabeta_multiple/materials.xml
+++ b/tests/test_salphabeta_multiple/materials.xml
@@ -4,7 +4,7 @@
   <!-- 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>
+  <default_xs>71c</default_xs>
 
   <!-- Plutonium -->
   <material id="1">
diff --git a/tests/test_score_MT/materials.xml b/tests/test_score_MT/materials.xml
index fca25cc87..845fdf190 100644
--- a/tests/test_score_MT/materials.xml
+++ b/tests/test_score_MT/materials.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <materials>
 
-  <default_xs>70c</default_xs>
+  <default_xs>71c</default_xs>
 
   <!-- Fuel composition -->
   <material id="1">
diff --git a/tests/test_score_absorption/materials.xml b/tests/test_score_absorption/materials.xml
index fca25cc87..845fdf190 100644
--- a/tests/test_score_absorption/materials.xml
+++ b/tests/test_score_absorption/materials.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <materials>
 
-  <default_xs>70c</default_xs>
+  <default_xs>71c</default_xs>
 
   <!-- Fuel composition -->
   <material id="1">
diff --git a/tests/test_score_current/materials.xml b/tests/test_score_current/materials.xml
index fca25cc87..845fdf190 100644
--- a/tests/test_score_current/materials.xml
+++ b/tests/test_score_current/materials.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <materials>
 
-  <default_xs>70c</default_xs>
+  <default_xs>71c</default_xs>
 
   <!-- Fuel composition -->
   <material id="1">
diff --git a/tests/test_score_events/materials.xml b/tests/test_score_events/materials.xml
index fca25cc87..845fdf190 100644
--- a/tests/test_score_events/materials.xml
+++ b/tests/test_score_events/materials.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <materials>
 
-  <default_xs>70c</default_xs>
+  <default_xs>71c</default_xs>
 
   <!-- Fuel composition -->
   <material id="1">
diff --git a/tests/test_score_fission/materials.xml b/tests/test_score_fission/materials.xml
index fca25cc87..845fdf190 100644
--- a/tests/test_score_fission/materials.xml
+++ b/tests/test_score_fission/materials.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <materials>
 
-  <default_xs>70c</default_xs>
+  <default_xs>71c</default_xs>
 
   <!-- Fuel composition -->
   <material id="1">
diff --git a/tests/test_score_flux/materials.xml b/tests/test_score_flux/materials.xml
index fca25cc87..845fdf190 100644
--- a/tests/test_score_flux/materials.xml
+++ b/tests/test_score_flux/materials.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <materials>
 
-  <default_xs>70c</default_xs>
+  <default_xs>71c</default_xs>
 
   <!-- Fuel composition -->
   <material id="1">
diff --git a/tests/test_score_kappafission/materials.xml b/tests/test_score_kappafission/materials.xml
index fca25cc87..845fdf190 100644
--- a/tests/test_score_kappafission/materials.xml
+++ b/tests/test_score_kappafission/materials.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <materials>
 
-  <default_xs>70c</default_xs>
+  <default_xs>71c</default_xs>
 
   <!-- Fuel composition -->
   <material id="1">
diff --git a/tests/test_score_nufission/materials.xml b/tests/test_score_nufission/materials.xml
index fca25cc87..845fdf190 100644
--- a/tests/test_score_nufission/materials.xml
+++ b/tests/test_score_nufission/materials.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <materials>
 
-  <default_xs>70c</default_xs>
+  <default_xs>71c</default_xs>
 
   <!-- Fuel composition -->
   <material id="1">
diff --git a/tests/test_score_nuscatter/materials.xml b/tests/test_score_nuscatter/materials.xml
index fca25cc87..845fdf190 100644
--- a/tests/test_score_nuscatter/materials.xml
+++ b/tests/test_score_nuscatter/materials.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <materials>
 
-  <default_xs>70c</default_xs>
+  <default_xs>71c</default_xs>
 
   <!-- Fuel composition -->
   <material id="1">
diff --git a/tests/test_score_scatter/materials.xml b/tests/test_score_scatter/materials.xml
index fca25cc87..845fdf190 100644
--- a/tests/test_score_scatter/materials.xml
+++ b/tests/test_score_scatter/materials.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <materials>
 
-  <default_xs>70c</default_xs>
+  <default_xs>71c</default_xs>
 
   <!-- Fuel composition -->
   <material id="1">
diff --git a/tests/test_score_scatter_n/materials.xml b/tests/test_score_scatter_n/materials.xml
index fca25cc87..845fdf190 100644
--- a/tests/test_score_scatter_n/materials.xml
+++ b/tests/test_score_scatter_n/materials.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <materials>
 
-  <default_xs>70c</default_xs>
+  <default_xs>71c</default_xs>
 
   <!-- Fuel composition -->
   <material id="1">
diff --git a/tests/test_score_scatter_pn/materials.xml b/tests/test_score_scatter_pn/materials.xml
index fca25cc87..845fdf190 100644
--- a/tests/test_score_scatter_pn/materials.xml
+++ b/tests/test_score_scatter_pn/materials.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <materials>
 
-  <default_xs>70c</default_xs>
+  <default_xs>71c</default_xs>
 
   <!-- Fuel composition -->
   <material id="1">
diff --git a/tests/test_score_total/materials.xml b/tests/test_score_total/materials.xml
index fca25cc87..845fdf190 100644
--- a/tests/test_score_total/materials.xml
+++ b/tests/test_score_total/materials.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <materials>
 
-  <default_xs>70c</default_xs>
+  <default_xs>71c</default_xs>
 
   <!-- Fuel composition -->
   <material id="1">
diff --git a/tests/test_seed/materials.xml b/tests/test_seed/materials.xml
index 1f85510e0..315c0fa84 100644
--- a/tests/test_seed/materials.xml
+++ b/tests/test_seed/materials.xml
@@ -3,7 +3,7 @@
 
   <material id="1">
     <density value="4.5" units="g/cc" />
-    <nuclide name="U-235" xs="70c" ao="1.0" />
+    <nuclide name="U-235" xs="71c" ao="1.0" />
   </material>
 
 </materials>
diff --git a/tests/test_source_angle_mono/materials.xml b/tests/test_source_angle_mono/materials.xml
index 1f85510e0..315c0fa84 100644
--- a/tests/test_source_angle_mono/materials.xml
+++ b/tests/test_source_angle_mono/materials.xml
@@ -3,7 +3,7 @@
 
   <material id="1">
     <density value="4.5" units="g/cc" />
-    <nuclide name="U-235" xs="70c" ao="1.0" />
+    <nuclide name="U-235" xs="71c" ao="1.0" />
   </material>
 
 </materials>
diff --git a/tests/test_source_energy_maxwell/materials.xml b/tests/test_source_energy_maxwell/materials.xml
index 1f85510e0..315c0fa84 100644
--- a/tests/test_source_energy_maxwell/materials.xml
+++ b/tests/test_source_energy_maxwell/materials.xml
@@ -3,7 +3,7 @@
 
   <material id="1">
     <density value="4.5" units="g/cc" />
-    <nuclide name="U-235" xs="70c" ao="1.0" />
+    <nuclide name="U-235" xs="71c" ao="1.0" />
   </material>
 
 </materials>
diff --git a/tests/test_source_energy_mono/materials.xml b/tests/test_source_energy_mono/materials.xml
index 1f85510e0..315c0fa84 100644
--- a/tests/test_source_energy_mono/materials.xml
+++ b/tests/test_source_energy_mono/materials.xml
@@ -3,7 +3,7 @@
 
   <material id="1">
     <density value="4.5" units="g/cc" />
-    <nuclide name="U-235" xs="70c" ao="1.0" />
+    <nuclide name="U-235" xs="71c" ao="1.0" />
   </material>
 
 </materials>
diff --git a/tests/test_source_file/materials.xml b/tests/test_source_file/materials.xml
index 1f85510e0..315c0fa84 100644
--- a/tests/test_source_file/materials.xml
+++ b/tests/test_source_file/materials.xml
@@ -3,7 +3,7 @@
 
   <material id="1">
     <density value="4.5" units="g/cc" />
-    <nuclide name="U-235" xs="70c" ao="1.0" />
+    <nuclide name="U-235" xs="71c" ao="1.0" />
   </material>
 
 </materials>
diff --git a/tests/test_source_point/materials.xml b/tests/test_source_point/materials.xml
index 1f85510e0..315c0fa84 100644
--- a/tests/test_source_point/materials.xml
+++ b/tests/test_source_point/materials.xml
@@ -3,7 +3,7 @@
 
   <material id="1">
     <density value="4.5" units="g/cc" />
-    <nuclide name="U-235" xs="70c" ao="1.0" />
+    <nuclide name="U-235" xs="71c" ao="1.0" />
   </material>
 
 </materials>
diff --git a/tests/test_sourcepoint_batch/materials.xml b/tests/test_sourcepoint_batch/materials.xml
index 1f85510e0..315c0fa84 100644
--- a/tests/test_sourcepoint_batch/materials.xml
+++ b/tests/test_sourcepoint_batch/materials.xml
@@ -3,7 +3,7 @@
 
   <material id="1">
     <density value="4.5" units="g/cc" />
-    <nuclide name="U-235" xs="70c" ao="1.0" />
+    <nuclide name="U-235" xs="71c" ao="1.0" />
   </material>
 
 </materials>
diff --git a/tests/test_sourcepoint_interval/materials.xml b/tests/test_sourcepoint_interval/materials.xml
index 1f85510e0..315c0fa84 100644
--- a/tests/test_sourcepoint_interval/materials.xml
+++ b/tests/test_sourcepoint_interval/materials.xml
@@ -3,7 +3,7 @@
 
   <material id="1">
     <density value="4.5" units="g/cc" />
-    <nuclide name="U-235" xs="70c" ao="1.0" />
+    <nuclide name="U-235" xs="71c" ao="1.0" />
   </material>
 
 </materials>
diff --git a/tests/test_sourcepoint_latest/materials.xml b/tests/test_sourcepoint_latest/materials.xml
index 1f85510e0..315c0fa84 100644
--- a/tests/test_sourcepoint_latest/materials.xml
+++ b/tests/test_sourcepoint_latest/materials.xml
@@ -3,7 +3,7 @@
 
   <material id="1">
     <density value="4.5" units="g/cc" />
-    <nuclide name="U-235" xs="70c" ao="1.0" />
+    <nuclide name="U-235" xs="71c" ao="1.0" />
   </material>
 
 </materials>
diff --git a/tests/test_sourcepoint_restart/materials.xml b/tests/test_sourcepoint_restart/materials.xml
index 1f85510e0..315c0fa84 100644
--- a/tests/test_sourcepoint_restart/materials.xml
+++ b/tests/test_sourcepoint_restart/materials.xml
@@ -3,7 +3,7 @@
 
   <material id="1">
     <density value="4.5" units="g/cc" />
-    <nuclide name="U-235" xs="70c" ao="1.0" />
+    <nuclide name="U-235" xs="71c" ao="1.0" />
   </material>
 
 </materials>
diff --git a/tests/test_statepoint_batch/materials.xml b/tests/test_statepoint_batch/materials.xml
index 1f85510e0..315c0fa84 100644
--- a/tests/test_statepoint_batch/materials.xml
+++ b/tests/test_statepoint_batch/materials.xml
@@ -3,7 +3,7 @@
 
   <material id="1">
     <density value="4.5" units="g/cc" />
-    <nuclide name="U-235" xs="70c" ao="1.0" />
+    <nuclide name="U-235" xs="71c" ao="1.0" />
   </material>
 
 </materials>
diff --git a/tests/test_statepoint_interval/materials.xml b/tests/test_statepoint_interval/materials.xml
index 1f85510e0..315c0fa84 100644
--- a/tests/test_statepoint_interval/materials.xml
+++ b/tests/test_statepoint_interval/materials.xml
@@ -3,7 +3,7 @@
 
   <material id="1">
     <density value="4.5" units="g/cc" />
-    <nuclide name="U-235" xs="70c" ao="1.0" />
+    <nuclide name="U-235" xs="71c" ao="1.0" />
   </material>
 
 </materials>
diff --git a/tests/test_statepoint_restart/materials.xml b/tests/test_statepoint_restart/materials.xml
index 1f85510e0..315c0fa84 100644
--- a/tests/test_statepoint_restart/materials.xml
+++ b/tests/test_statepoint_restart/materials.xml
@@ -3,7 +3,7 @@
 
   <material id="1">
     <density value="4.5" units="g/cc" />
-    <nuclide name="U-235" xs="70c" ao="1.0" />
+    <nuclide name="U-235" xs="71c" ao="1.0" />
   </material>
 
 </materials>
diff --git a/tests/test_statepoint_sourcesep/materials.xml b/tests/test_statepoint_sourcesep/materials.xml
index 1f85510e0..315c0fa84 100644
--- a/tests/test_statepoint_sourcesep/materials.xml
+++ b/tests/test_statepoint_sourcesep/materials.xml
@@ -3,7 +3,7 @@
 
   <material id="1">
     <density value="4.5" units="g/cc" />
-    <nuclide name="U-235" xs="70c" ao="1.0" />
+    <nuclide name="U-235" xs="71c" ao="1.0" />
   </material>
 
 </materials>
diff --git a/tests/test_survival_biasing/materials.xml b/tests/test_survival_biasing/materials.xml
index 1382ad595..1748e09fd 100644
--- a/tests/test_survival_biasing/materials.xml
+++ b/tests/test_survival_biasing/materials.xml
@@ -3,8 +3,8 @@
 
   <material id="1">
     <density value="19.5" units="g/cc" />
-    <nuclide name="U-235" xs="70c" ao="2.0" />
-    <nuclide name="U-238" xs="70c" ao="1.0" />
+    <nuclide name="U-235" xs="71c" ao="2.0" />
+    <nuclide name="U-238" xs="71c" ao="1.0" />
   </material>
 
 </materials>
diff --git a/tests/test_tally_assumesep/materials.xml b/tests/test_tally_assumesep/materials.xml
index fca25cc87..845fdf190 100644
--- a/tests/test_tally_assumesep/materials.xml
+++ b/tests/test_tally_assumesep/materials.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <materials>
 
-  <default_xs>70c</default_xs>
+  <default_xs>71c</default_xs>
 
   <!-- Fuel composition -->
   <material id="1">
diff --git a/tests/test_trace/materials.xml b/tests/test_trace/materials.xml
index 1f85510e0..315c0fa84 100644
--- a/tests/test_trace/materials.xml
+++ b/tests/test_trace/materials.xml
@@ -3,7 +3,7 @@
 
   <material id="1">
     <density value="4.5" units="g/cc" />
-    <nuclide name="U-235" xs="70c" ao="1.0" />
+    <nuclide name="U-235" xs="71c" ao="1.0" />
   </material>
 
 </materials>
diff --git a/tests/test_track_output/materials.xml b/tests/test_track_output/materials.xml
index bbf880d96..6c17607b6 100644
--- a/tests/test_track_output/materials.xml
+++ b/tests/test_track_output/materials.xml
@@ -4,27 +4,27 @@
 <!-- material 1: Water with 1511 PPM -->
   <material id="1">
     <density value="0.99823" units="g/cc" />
-    <nuclide name="H-1"  xs="70c" ao="6.6737E-002" />
-    <nuclide name="O-16" xs="70c" ao="3.3369E-002" />
-    <nuclide name="B-10" xs="70c" ao="1.6769E-005" />
-    <nuclide name="B-11" xs="70c" ao="6.7497E-005" />
+    <nuclide name="H-1"  xs="71c" ao="6.6737E-002" />
+    <nuclide name="O-16" xs="71c" ao="3.3369E-002" />
+    <nuclide name="B-10" xs="71c" ao="1.6769E-005" />
+    <nuclide name="B-11" xs="71c" ao="6.7497E-005" />
     <sab name="lwtr" xs="10t" />
   </material>
 
 <!-- material 2: Fuel (2.459 w/o with B-10 for impurities) -->
   <material id="2">
     <density value="10.24" units="g/cc" />
-    <nuclide name="U-235" xs="70c" ao="5.6868E-004" />
-<!--    <nuclide name="U-234" xs="70c" ao="4.5689E-006" />  -->
-    <nuclide name="U-238" xs="70c" ao="2.2268E-002" />
-    <nuclide name="O-16"  xs="70c" ao="4.5683E-002" />
-    <nuclide name="B-10"  xs="70c" ao="2.6055E-007" />
+    <nuclide name="U-235" xs="71c" ao="5.6868E-004" />
+<!--    <nuclide name="U-234" xs="71c" ao="4.5689E-006" />  -->
+    <nuclide name="U-238" xs="71c" ao="2.2268E-002" />
+    <nuclide name="O-16"  xs="71c" ao="4.5683E-002" />
+    <nuclide name="B-10"  xs="71c" ao="2.6055E-007" />
   </material>
 
   <!--               Zircaloy-4               -->
   <material id="3">
     <density value="  6.55" units="g/cc" />
-    <nuclide name="O-16"  xs="70c" ao="3.0743e-04" />
+    <nuclide name="O-16"  xs="71c" ao="3.0743e-04" />
 <!--    <nuclide name="O-17"  xs="71c" ao="7.4887e-07" />-->
 <!--    <nuclide name="Cr-50"  xs="71c" ao="3.2962e-06" />-->
 <!--    <nuclide name="Cr-52"  xs="71c" ao="6.3564e-05" />-->
@@ -34,11 +34,11 @@
 <!--    <nuclide name="Fe-56"  xs="71c" ao="1.3610e-04" />-->
 <!--    <nuclide name="Fe-57"  xs="71c" ao="3.1431e-06" />-->
 <!--    <nuclide name="Fe-58"  xs="71c" ao="4.1829e-07" />-->
-    <nuclide name="Zr-90"  xs="70c" ao="2.1827e-02" />
-    <nuclide name="Zr-91"  xs="70c" ao="4.7600e-03" />
-    <nuclide name="Zr-92"  xs="70c" ao="7.2758e-03" />
-    <nuclide name="Zr-94"  xs="70c" ao="7.3734e-03" />
-    <nuclide name="Zr-96"  xs="70c" ao="1.1879e-03" />
+    <nuclide name="Zr-90"  xs="71c" ao="2.1827e-02" />
+    <nuclide name="Zr-91"  xs="71c" ao="4.7600e-03" />
+    <nuclide name="Zr-92"  xs="71c" ao="7.2758e-03" />
+    <nuclide name="Zr-94"  xs="71c" ao="7.3734e-03" />
+    <nuclide name="Zr-96"  xs="71c" ao="1.1879e-03" />
 <!--    <nuclide name="Sn-112"  xs="71c" ao="4.6735e-06" />-->
 <!--    <nuclide name="Sn-114"  xs="71c" ao="3.1799e-06" />-->
 <!--    <nuclide name="Sn-115"  xs="71c" ao="1.6381e-06" />-->
@@ -54,42 +54,42 @@
 <!-- material 3: Fuel Aluminum 6061 cladding -->
 <!--  <material id="3">-->
 <!--    <density value="2.5052" units="g/cc" />-->
-<!--    <nuclide name="Al-27" xs="70c" ao="5.3985e-02" />-->
-<!--    <nuclide name="Mn-55" xs="70c" ao="4.1191e-05" />-->
-<!--    <nuclide name="Mg-24" xs="70c" ao="4.9031e-04" />-->
-<!--    <nuclide name="Mg-25" xs="70c" ao="6.2072e-05" />-->
-<!--    <nuclide name="Mg-26" xs="70c" ao="6.8341e-05" />-->
-<!--    <nuclide name="Si-28" xs="70c" ao="2.9726e-04" />-->
-<!--    <nuclide name="Si-29" xs="70c" ao="1.5094e-05" />-->
-<!--    <nuclide name="Si-30" xs="70c" ao="9.9499e-06" />-->
-<!--    <nuclide name="Cr-50" xs="70c" ao="2.5214e-06" />-->
-<!--    <nuclide name="Cr-52" xs="70c" ao="4.8622e-05" />-->
-<!--    <nuclide name="Cr-53" xs="70c" ao="5.5133e-06" />-->
-<!--    <nuclide name="Cr-54" xs="70c" ao="1.3724e-06" />-->
-<!--    <nuclide name="Fe-54" xs="70c" ao="1.1053e-05" />-->
-<!--    <nuclide name="Fe-56" xs="70c" ao="1.7351e-04" />-->
-<!--    <nuclide name="Fe-57" xs="70c" ao="4.0070e-06" />-->
-<!--    <nuclide name="Fe-58" xs="70c" ao="5.3326e-07" />-->
-<!--    <nuclide name="Ti-46" xs="70c" ao="3.8992e-06" />-->
-<!--    <nuclide name="Ti-47" xs="70c" ao="3.5164e-06" />-->
-<!--    <nuclide name="Ti-48" xs="70c" ao="3.4842e-05" />-->
-<!--    <nuclide name="Ti-49" xs="70c" ao="2.5569e-06" />-->
-<!--    <nuclide name="Ti-50" xs="70c" ao="2.4482e-06" />-->
-<!--    <nuclide name="Cu-63" xs="70c" ao="4.1054e-05" />-->
-<!--    <nuclide name="Cu-65" xs="70c" ao="1.8299e-05" />-->
+<!--    <nuclide name="Al-27" xs="71c" ao="5.3985e-02" />-->
+<!--    <nuclide name="Mn-55" xs="71c" ao="4.1191e-05" />-->
+<!--    <nuclide name="Mg-24" xs="71c" ao="4.9031e-04" />-->
+<!--    <nuclide name="Mg-25" xs="71c" ao="6.2072e-05" />-->
+<!--    <nuclide name="Mg-26" xs="71c" ao="6.8341e-05" />-->
+<!--    <nuclide name="Si-28" xs="71c" ao="2.9726e-04" />-->
+<!--    <nuclide name="Si-29" xs="71c" ao="1.5094e-05" />-->
+<!--    <nuclide name="Si-30" xs="71c" ao="9.9499e-06" />-->
+<!--    <nuclide name="Cr-50" xs="71c" ao="2.5214e-06" />-->
+<!--    <nuclide name="Cr-52" xs="71c" ao="4.8622e-05" />-->
+<!--    <nuclide name="Cr-53" xs="71c" ao="5.5133e-06" />-->
+<!--    <nuclide name="Cr-54" xs="71c" ao="1.3724e-06" />-->
+<!--    <nuclide name="Fe-54" xs="71c" ao="1.1053e-05" />-->
+<!--    <nuclide name="Fe-56" xs="71c" ao="1.7351e-04" />-->
+<!--    <nuclide name="Fe-57" xs="71c" ao="4.0070e-06" />-->
+<!--    <nuclide name="Fe-58" xs="71c" ao="5.3326e-07" />-->
+<!--    <nuclide name="Ti-46" xs="71c" ao="3.8992e-06" />-->
+<!--    <nuclide name="Ti-47" xs="71c" ao="3.5164e-06" />-->
+<!--    <nuclide name="Ti-48" xs="71c" ao="3.4842e-05" />-->
+<!--    <nuclide name="Ti-49" xs="71c" ao="2.5569e-06" />-->
+<!--    <nuclide name="Ti-50" xs="71c" ao="2.4482e-06" />-->
+<!--    <nuclide name="Cu-63" xs="71c" ao="4.1054e-05" />-->
+<!--    <nuclide name="Cu-65" xs="71c" ao="1.8299e-05" />-->
 <!--  </material>-->
 
 <!-- material 4: Control Rod Material -->
   <material id="4">
     <density value="2.2442" units="g/cc" />
-    <nuclide name="B-10"  xs="70c" ao="9.7491e-4" />
-    <nuclide name="B-11"  xs="70c" ao="3.9241e-3" />
-    <nuclide name="O-16"  xs="70c" ao="4.4829e-2" />
-<!--    <nuclide name="Na-23" xs="70c" ao="1.7444e-3" />-->
-<!--    <nuclide name="Al-27" xs="70c" ao="1.0018e-3" />-->
-<!--    <nuclide name="Si-28" xs="70c" ao="1.6884e-02" />-->
-<!--    <nuclide name="Si-29" xs="70c" ao="8.5730e-04" />-->
-<!--    <nuclide name="Si-30" xs="70c" ao="5.6513e-04" />-->
+    <nuclide name="B-10"  xs="71c" ao="9.7491e-4" />
+    <nuclide name="B-11"  xs="71c" ao="3.9241e-3" />
+    <nuclide name="O-16"  xs="71c" ao="4.4829e-2" />
+<!--    <nuclide name="Na-23" xs="71c" ao="1.7444e-3" />-->
+<!--    <nuclide name="Al-27" xs="71c" ao="1.0018e-3" />-->
+<!--    <nuclide name="Si-28" xs="71c" ao="1.6884e-02" />-->
+<!--    <nuclide name="Si-29" xs="71c" ao="8.5730e-04" />-->
+<!--    <nuclide name="Si-30" xs="71c" ao="5.6513e-04" />-->
   </material>
   
 </materials>
diff --git a/tests/test_translation/materials.xml b/tests/test_translation/materials.xml
index 1f85510e0..315c0fa84 100644
--- a/tests/test_translation/materials.xml
+++ b/tests/test_translation/materials.xml
@@ -3,7 +3,7 @@
 
   <material id="1">
     <density value="4.5" units="g/cc" />
-    <nuclide name="U-235" xs="70c" ao="1.0" />
+    <nuclide name="U-235" xs="71c" ao="1.0" />
   </material>
 
 </materials>
diff --git a/tests/test_uniform_fs/materials.xml b/tests/test_uniform_fs/materials.xml
index 1f85510e0..315c0fa84 100644
--- a/tests/test_uniform_fs/materials.xml
+++ b/tests/test_uniform_fs/materials.xml
@@ -3,7 +3,7 @@
 
   <material id="1">
     <density value="4.5" units="g/cc" />
-    <nuclide name="U-235" xs="70c" ao="1.0" />
+    <nuclide name="U-235" xs="71c" ao="1.0" />
   </material>
 
 </materials>
diff --git a/tests/test_universe/materials.xml b/tests/test_universe/materials.xml
index 1f85510e0..315c0fa84 100644
--- a/tests/test_universe/materials.xml
+++ b/tests/test_universe/materials.xml
@@ -3,7 +3,7 @@
 
   <material id="1">
     <density value="4.5" units="g/cc" />
-    <nuclide name="U-235" xs="70c" ao="1.0" />
+    <nuclide name="U-235" xs="71c" ao="1.0" />
   </material>
 
 </materials>
diff --git a/tests/test_void/materials.xml b/tests/test_void/materials.xml
index a54e54e42..57ab4f736 100644
--- a/tests/test_void/materials.xml
+++ b/tests/test_void/materials.xml
@@ -3,7 +3,7 @@
 
   <!-- pu-met-fast-019 -->
 
-  <default_xs>70c</default_xs>
+  <default_xs>71c</default_xs>
 
   <!-- Plutonium -->
   <material id="1">