diff --git a/tests/regression_tests/deplete_with_transport/last_step_reference_materials.xml b/tests/regression_tests/deplete_with_transport/last_step_reference_materials.xml
index fc9fd0cf5..b81856683 100644
--- a/tests/regression_tests/deplete_with_transport/last_step_reference_materials.xml
+++ b/tests/regression_tests/deplete_with_transport/last_step_reference_materials.xml
@@ -4,43 +4,43 @@
     <density units="sum" />
     <nuclide ao="0.046295399999999994" name="O16" />
     <nuclide ao="0.00011276839999999999" name="O17" />
-    <nuclide ao="4.624897827397648e-07" name="Cs135" />
+    <nuclide ao="4.62489782739765e-07" name="Cs135" />
     <nuclide ao="8.513845108222934e-09" name="Gd156" />
-    <nuclide ao="3.6422790646859426e-10" name="Gd157" />
+    <nuclide ao="3.6422790646859405e-10" name="Gd157" />
     <nuclide ao="1.2506256160444458e-08" name="I135" />
     <nuclide ao="1.0044833338996991e-05" name="U234" />
     <nuclide ao="0.0010135760878333647" name="U235" />
     <nuclide ao="0.022134354214267578" name="U238" />
     <nuclide ao="6.021515908249729e-09" name="Xe135" />
-    <nuclide ao="1.894526271330101e-06" name="Xe136" />
+    <nuclide ao="1.8945262713301022e-06" name="Xe136" />
   </material>
   <material depletable="true" id="2" temperature="293.6" volume="0.06674732823364922">
     <density units="sum" />
     <nuclide ao="0.046295399999999994" name="O16" />
     <nuclide ao="0.00011276839999999999" name="O17" />
-    <nuclide ao="4.1317192551597174e-07" name="Cs135" />
+    <nuclide ao="4.1317192551597164e-07" name="Cs135" />
     <nuclide ao="7.1951197683939435e-09" name="Gd156" />
-    <nuclide ao="4.554662978016358e-10" name="Gd157" />
+    <nuclide ao="4.554662978016352e-10" name="Gd157" />
     <nuclide ao="9.143600937356816e-09" name="I135" />
     <nuclide ao="1.004460107410099e-05" name="U234" />
     <nuclide ao="0.0010219836045364463" name="U235" />
     <nuclide ao="0.022134432003405754" name="U238" />
-    <nuclide ao="4.8818754167757864e-09" name="Xe135" />
-    <nuclide ao="1.4950302645958768e-06" name="Xe136" />
+    <nuclide ao="4.881875416775785e-09" name="Xe135" />
+    <nuclide ao="1.4950302645958752e-06" name="Xe136" />
   </material>
   <material depletable="true" id="3" temperature="293.6" volume="0.06674732823364922">
     <density units="sum" />
     <nuclide ao="0.046295399999999994" name="O16" />
     <nuclide ao="0.00011276839999999999" name="O17" />
-    <nuclide ao="4.423302326792641e-07" name="Cs135" />
+    <nuclide ao="4.4233023267926427e-07" name="Cs135" />
     <nuclide ao="7.650057506928347e-09" name="Gd156" />
     <nuclide ao="4.381381122619264e-10" name="Gd157" />
-    <nuclide ao="1.1144702868821655e-08" name="I135" />
+    <nuclide ao="1.1144702868821656e-08" name="I135" />
     <nuclide ao="1.0044728829940631e-05" name="U234" />
     <nuclide ao="0.0010193377809846768" name="U235" />
     <nuclide ao="0.022134335403001696" name="U238" />
-    <nuclide ao="5.17463717580927e-09" name="Xe135" />
-    <nuclide ao="1.607404832278296e-06" name="Xe136" />
+    <nuclide ao="5.174637175809274e-09" name="Xe135" />
+    <nuclide ao="1.6074048322782988e-06" name="Xe136" />
   </material>
   <material depletable="true" id="4" temperature="293.6" volume="0.06674732823364922">
     <density units="sum" />
@@ -48,12 +48,12 @@
     <nuclide ao="0.00011276839999999999" name="O17" />
     <nuclide ao="4.542189401531697e-07" name="Cs135" />
     <nuclide ao="7.626788139129838e-09" name="Gd156" />
-    <nuclide ao="4.554036803723092e-10" name="Gd157" />
-    <nuclide ao="8.895917147950859e-09" name="I135" />
+    <nuclide ao="4.554036803723083e-10" name="Gd157" />
+    <nuclide ao="8.895917147950857e-09" name="I135" />
     <nuclide ao="1.0044742882017663e-05" name="U234" />
     <nuclide ao="0.0010195876256423235" name="U235" />
     <nuclide ao="0.022134338074593186" name="U238" />
-    <nuclide ao="5.204386319535497e-09" name="Xe135" />
+    <nuclide ao="5.204386319535494e-09" name="Xe135" />
     <nuclide ao="1.584256968309388e-06" name="Xe136" />
   </material>
   <material depletable="true" id="5" temperature="293.6" volume="0.06674732823364922">
@@ -67,7 +67,7 @@
     <nuclide ao="0.001020680539756473" name="U235" />
     <nuclide ao="0.02169185104259157" name="U238" />
     <nuclide ao="4.953957753020382e-09" name="Xe135" />
-    <nuclide ao="4.222498934374298e-07" name="Xe136" />
+    <nuclide ao="4.2224989343743e-07" name="Xe136" />
   </material>
   <material depletable="true" id="6" temperature="293.6" volume="0.06674732823364922">
     <density units="sum" />
@@ -80,7 +80,7 @@
     <nuclide ao="1.0045052172260698e-05" name="U234" />
     <nuclide ao="0.0010182855830539153" name="U235" />
     <nuclide ao="0.022134415874096557" name="U238" />
-    <nuclide ao="5.070841178646677e-09" name="Xe135" />
+    <nuclide ao="5.070841178646676e-09" name="Xe135" />
     <nuclide ao="1.668376743604047e-06" name="Xe136" />
   </material>
   <material depletable="true" id="7" temperature="293.6" volume="0.06674732823364922">
@@ -89,26 +89,26 @@
     <nuclide ao="0.00011276839999999999" name="O17" />
     <nuclide ao="4.3759923148120817e-07" name="Cs135" />
     <nuclide ao="7.232791130625652e-09" name="Gd156" />
-    <nuclide ao="3.792760808155052e-10" name="Gd157" />
-    <nuclide ao="1.115660128573494e-08" name="I135" />
+    <nuclide ao="3.7927608081550524e-10" name="Gd157" />
+    <nuclide ao="1.1156601285734938e-08" name="I135" />
     <nuclide ao="1.004487073698697e-05" name="U234" />
     <nuclide ao="0.0010209689261418493" name="U235" />
     <nuclide ao="0.02213459371150142" name="U238" />
-    <nuclide ao="5.144327718930223e-09" name="Xe135" />
+    <nuclide ao="5.1443277189302275e-09" name="Xe135" />
     <nuclide ao="1.5202410851946595e-06" name="Xe136" />
   </material>
   <material depletable="true" id="8" temperature="293.6" volume="0.06674732823364922">
     <density units="sum" />
     <nuclide ao="0.046295399999999994" name="O16" />
     <nuclide ao="0.00011276839999999999" name="O17" />
-    <nuclide ao="4.2806757694679807e-07" name="Cs135" />
+    <nuclide ao="4.280675769467985e-07" name="Cs135" />
     <nuclide ao="7.10207611740966e-09" name="Gd156" />
-    <nuclide ao="3.928235145249647e-10" name="Gd157" />
+    <nuclide ao="3.928235145249649e-10" name="Gd157" />
     <nuclide ao="1.0609418645407898e-08" name="I135" />
     <nuclide ao="1.0045055277866812e-05" name="U234" />
     <nuclide ao="0.0010225358567290844" name="U235" />
     <nuclide ao="0.022134460728100176" name="U238" />
-    <nuclide ao="5.0634492814917475e-09" name="Xe135" />
+    <nuclide ao="5.0634492814917524e-09" name="Xe135" />
     <nuclide ao="1.4482994979866368e-06" name="Xe136" />
   </material>
   <material depletable="true" id="9" temperature="293.6" volume="0.06674732823364922">
@@ -116,13 +116,13 @@
     <nuclide ao="0.046295399999999994" name="O16" />
     <nuclide ao="0.00011276839999999999" name="O17" />
     <nuclide ao="4.559793845032722e-07" name="Cs135" />
-    <nuclide ao="7.582229687374046e-09" name="Gd156" />
-    <nuclide ao="4.4564404684709084e-10" name="Gd157" />
+    <nuclide ao="7.582229687374048e-09" name="Gd156" />
+    <nuclide ao="4.456440468470913e-10" name="Gd157" />
     <nuclide ao="1.029443385362887e-08" name="I135" />
     <nuclide ao="1.0044938876088381e-05" name="U234" />
     <nuclide ao="0.0010192632278857815" name="U235" />
     <nuclide ao="0.02213445313268344" name="U238" />
-    <nuclide ao="5.2755280107608386e-09" name="Xe135" />
+    <nuclide ao="5.275528010760839e-09" name="Xe135" />
     <nuclide ao="1.596587382150181e-06" name="Xe136" />
   </material>
   <material depletable="true" id="10" temperature="293.6" volume="0.06674732823364922">
@@ -132,40 +132,40 @@
     <nuclide ao="4.44817494586689e-07" name="Cs135" />
     <nuclide ao="7.490669966660647e-09" name="Gd156" />
     <nuclide ao="4.71815870798701e-10" name="Gd157" />
-    <nuclide ao="9.867587758336676e-09" name="I135" />
+    <nuclide ao="9.867587758336683e-09" name="I135" />
     <nuclide ao="1.0044704634003168e-05" name="U234" />
     <nuclide ao="0.0010206456322883754" name="U235" />
     <nuclide ao="0.022134323221279867" name="U238" />
     <nuclide ao="5.53059630716541e-09" name="Xe135" />
-    <nuclide ao="1.5357161329193736e-06" name="Xe136" />
+    <nuclide ao="1.5357161329193738e-06" name="Xe136" />
   </material>
   <material depletable="true" id="11" temperature="293.6" volume="0.06674732823364922">
     <density units="sum" />
     <nuclide ao="0.046295399999999994" name="O16" />
     <nuclide ao="0.00011276839999999999" name="O17" />
-    <nuclide ao="4.282643831977521e-07" name="Cs135" />
+    <nuclide ao="4.282643831977514e-07" name="Cs135" />
     <nuclide ao="7.165056334410694e-09" name="Gd156" />
-    <nuclide ao="5.400698922527228e-10" name="Gd157" />
+    <nuclide ao="5.400698922527225e-10" name="Gd157" />
     <nuclide ao="7.775293340138874e-09" name="I135" />
     <nuclide ao="1.0044769356912609e-05" name="U234" />
     <nuclide ao="0.001021935866502441" name="U235" />
     <nuclide ao="0.022134472030470687" name="U238" />
-    <nuclide ao="4.493995007417954e-09" name="Xe135" />
-    <nuclide ao="1.4836002218798118e-06" name="Xe136" />
+    <nuclide ao="4.493995007417953e-09" name="Xe135" />
+    <nuclide ao="1.4836002218798116e-06" name="Xe136" />
   </material>
   <material depletable="true" id="12" temperature="293.6" volume="0.06674732823364922">
     <density units="sum" />
     <nuclide ao="0.046295399999999994" name="O16" />
     <nuclide ao="0.00011276839999999999" name="O17" />
-    <nuclide ao="4.741632091028e-07" name="Cs135" />
+    <nuclide ao="4.741632091027997e-07" name="Cs135" />
     <nuclide ao="8.415478374932387e-09" name="Gd156" />
-    <nuclide ao="4.0336133245900057e-10" name="Gd157" />
+    <nuclide ao="4.033613324590009e-10" name="Gd157" />
     <nuclide ao="1.1643114539912112e-08" name="I135" />
     <nuclide ao="1.004447242717756e-05" name="U234" />
     <nuclide ao="0.0010150644409916258" name="U235" />
     <nuclide ao="0.02213416675074138" name="U238" />
-    <nuclide ao="5.784335592645145e-09" name="Xe135" />
-    <nuclide ao="1.8069945667353578e-06" name="Xe136" />
+    <nuclide ao="5.784335592645143e-09" name="Xe135" />
+    <nuclide ao="1.806994566735355e-06" name="Xe136" />
   </material>
   <material depletable="true" id="13" temperature="293.6" volume="0.06674732823364922">
     <density units="sum" />
@@ -178,35 +178,35 @@
     <nuclide ao="1.0044724172775715e-05" name="U234" />
     <nuclide ao="0.001018103389969383" name="U235" />
     <nuclide ao="0.022134305189450396" name="U238" />
-    <nuclide ao="5.031294643981541e-09" name="Xe135" />
+    <nuclide ao="5.0312946439815415e-09" name="Xe135" />
     <nuclide ao="1.6535497694757781e-06" name="Xe136" />
   </material>
   <material depletable="true" id="14" temperature="293.6" volume="0.06674732823364922">
     <density units="sum" />
     <nuclide ao="0.0464035" name="O16" />
-    <nuclide ao="4.3666286537020926e-07" name="Cs135" />
+    <nuclide ao="4.366628653702094e-07" name="Cs135" />
     <nuclide ao="4.388430681617881e-09" name="Gd156" />
     <nuclide ao="6.600323951301814e-05" name="Gd157" />
     <nuclide ao="5.053352663792413e-09" name="I135" />
     <nuclide ao="9.994409045755882e-22" name="U234" />
     <nuclide ao="0.0010197083224001177" name="U235" />
     <nuclide ao="0.02169165187132738" name="U238" />
-    <nuclide ao="6.0189115628739156e-09" name="Xe135" />
-    <nuclide ao="4.600161213826744e-07" name="Xe136" />
+    <nuclide ao="6.018911562873914e-09" name="Xe135" />
+    <nuclide ao="4.6001612138267453e-07" name="Xe136" />
   </material>
   <material depletable="true" id="15" temperature="293.6" volume="0.06674732823364922">
     <density units="sum" />
     <nuclide ao="0.046295399999999994" name="O16" />
     <nuclide ao="0.00011276839999999999" name="O17" />
-    <nuclide ao="4.3139411048431574e-07" name="Cs135" />
-    <nuclide ao="7.224160042371305e-09" name="Gd156" />
+    <nuclide ao="4.3139411048431606e-07" name="Cs135" />
+    <nuclide ao="7.224160042371308e-09" name="Gd156" />
     <nuclide ao="4.642850464029985e-10" name="Gd157" />
-    <nuclide ao="8.878225988486555e-09" name="I135" />
+    <nuclide ao="8.878225988486557e-09" name="I135" />
     <nuclide ao="1.0044520934515877e-05" name="U234" />
     <nuclide ao="0.0010222689272563134" name="U235" />
     <nuclide ao="0.02213434146375052" name="U238" />
     <nuclide ao="4.982718733545422e-09" name="Xe135" />
-    <nuclide ao="1.4631077263677625e-06" name="Xe136" />
+    <nuclide ao="1.463107726367763e-06" name="Xe136" />
   </material>
   <material depletable="true" id="16" temperature="293.6" volume="0.06674732823364922">
     <density units="sum" />
@@ -214,7 +214,7 @@
     <nuclide ao="0.00011276839999999999" name="O17" />
     <nuclide ao="3.978792866390379e-07" name="Cs135" />
     <nuclide ao="7.131568542674021e-09" name="Gd156" />
-    <nuclide ao="4.141825614030765e-10" name="Gd157" />
+    <nuclide ao="4.14182561403077e-10" name="Gd157" />
     <nuclide ao="8.628891597016043e-09" name="I135" />
     <nuclide ao="1.0044937378795481e-05" name="U234" />
     <nuclide ao="0.0010216967146178025" name="U235" />
@@ -228,13 +228,13 @@
     <nuclide ao="0.00011276839999999999" name="O17" />
     <nuclide ao="4.361587300667327e-07" name="Cs135" />
     <nuclide ao="7.652966242332066e-09" name="Gd156" />
-    <nuclide ao="4.0269493520725056e-10" name="Gd157" />
+    <nuclide ao="4.0269493520725103e-10" name="Gd157" />
     <nuclide ao="1.0287763271365341e-08" name="I135" />
     <nuclide ao="1.0044628974981731e-05" name="U234" />
     <nuclide ao="0.001019307885793122" name="U235" />
     <nuclide ao="0.02213435899652758" name="U238" />
     <nuclide ao="5.335489662559542e-09" name="Xe135" />
-    <nuclide ao="1.6155021246783795e-06" name="Xe136" />
+    <nuclide ao="1.6155021246783818e-06" name="Xe136" />
   </material>
   <material depletable="true" id="18" temperature="293.6" volume="0.06674732823364922">
     <density units="sum" />
@@ -256,12 +256,12 @@
     <nuclide ao="0.00011276839999999999" name="O17" />
     <nuclide ao="4.4334650292198094e-07" name="Cs135" />
     <nuclide ao="8.456093507204118e-09" name="Gd156" />
-    <nuclide ao="4.2015409417453396e-10" name="Gd157" />
+    <nuclide ao="4.2015409417453355e-10" name="Gd157" />
     <nuclide ao="1.1590633631986748e-08" name="I135" />
     <nuclide ao="1.0044722559306625e-05" name="U234" />
     <nuclide ao="0.0010139637421893387" name="U235" />
     <nuclide ao="0.022134355118638226" name="U238" />
-    <nuclide ao="5.279856109842654e-09" name="Xe135" />
+    <nuclide ao="5.2798561098426515e-09" name="Xe135" />
     <nuclide ao="1.8944747676725809e-06" name="Xe136" />
   </material>
   <material depletable="true" id="20" temperature="293.6" volume="0.06674732823364922">
@@ -270,7 +270,7 @@
     <nuclide ao="0.00011276839999999999" name="O17" />
     <nuclide ao="4.233940304952916e-07" name="Cs135" />
     <nuclide ao="6.7946743438445464e-09" name="Gd156" />
-    <nuclide ao="4.850851417583128e-10" name="Gd157" />
+    <nuclide ao="4.850851417583121e-10" name="Gd157" />
     <nuclide ao="8.62078796320785e-09" name="I135" />
     <nuclide ao="1.0044959797183482e-05" name="U234" />
     <nuclide ao="0.001024205970503497" name="U235" />
@@ -284,33 +284,33 @@
     <nuclide ao="0.00011276839999999999" name="O17" />
     <nuclide ao="4.4977401303629407e-07" name="Cs135" />
     <nuclide ao="7.613161316487511e-09" name="Gd156" />
-    <nuclide ao="4.910861007799468e-10" name="Gd157" />
+    <nuclide ao="4.91086100779947e-10" name="Gd157" />
     <nuclide ao="1.0228402002091387e-08" name="I135" />
     <nuclide ao="1.00446211211807e-05" name="U234" />
     <nuclide ao="0.001019759206943048" name="U235" />
     <nuclide ao="0.022134318621075122" name="U238" />
     <nuclide ao="5.284665508284e-09" name="Xe135" />
-    <nuclide ao="1.578386750630591e-06" name="Xe136" />
+    <nuclide ao="1.5783867506305915e-06" name="Xe136" />
   </material>
   <material depletable="true" id="22" temperature="293.6" volume="0.06674732823364922">
     <density units="sum" />
     <nuclide ao="0.046295399999999994" name="O16" />
     <nuclide ao="0.00011276839999999999" name="O17" />
-    <nuclide ao="4.777641737146629e-07" name="Cs135" />
+    <nuclide ao="4.777641737146631e-07" name="Cs135" />
     <nuclide ao="8.229359147865288e-09" name="Gd156" />
-    <nuclide ao="4.35455719154675e-10" name="Gd157" />
-    <nuclide ao="8.817955098831742e-09" name="I135" />
+    <nuclide ao="4.354557191546753e-10" name="Gd157" />
+    <nuclide ao="8.81795509883174e-09" name="I135" />
     <nuclide ao="1.0045011424787316e-05" name="U234" />
     <nuclide ao="0.0010142405131986574" name="U235" />
     <nuclide ao="0.0221345990368293" name="U238" />
-    <nuclide ao="5.072549445776802e-09" name="Xe135" />
+    <nuclide ao="5.0725494457768e-09" name="Xe135" />
     <nuclide ao="1.8441728300796666e-06" name="Xe136" />
   </material>
   <material depletable="true" id="23" temperature="293.6" volume="0.06674732823364922">
     <density units="sum" />
     <nuclide ao="0.0464035" name="O16" />
-    <nuclide ao="4.201013410185705e-07" name="Cs135" />
-    <nuclide ao="4.239420100206853e-09" name="Gd156" />
+    <nuclide ao="4.2010134101857104e-07" name="Cs135" />
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@@ -324,13 +324,13 @@
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+    <nuclide ao="6.770703705610544e-09" name="Gd156" />
+    <nuclide ao="3.9405965307363423e-10" name="Gd157" />
+    <nuclide ao="9.544557439499591e-09" name="I135" />
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-    <nuclide ao="5.519902727491704e-09" name="Xe135" />
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@@ -339,13 +339,13 @@
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+    <nuclide ao="5.1705089469748246e-09" name="Xe135" />
+    <nuclide ao="1.7092763789502104e-06" name="Xe136" />
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@@ -353,27 +353,27 @@
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-    <nuclide ao="1.4088788220239342e-06" name="Xe136" />
+    <nuclide ao="5.150498408472716e-09" name="Xe135" />
+    <nuclide ao="1.4088788220239346e-06" name="Xe136" />
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+    <nuclide ao="4.960965035278435e-09" name="Xe135" />
+    <nuclide ao="1.5235255296592858e-06" name="Xe136" />
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@@ -386,7 +386,7 @@
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@@ -395,7 +395,7 @@
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@@ -414,21 +414,21 @@
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+    <nuclide ao="5.610024692436442e-09" name="Xe135" />
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@@ -441,21 +441,21 @@
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@@ -463,14 +463,14 @@
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-    <nuclide ao="1.661275460172976e-06" name="Xe136" />
+    <nuclide ao="5.010417823889617e-09" name="Xe135" />
+    <nuclide ao="1.6612754601729747e-06" name="Xe136" />
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@@ -478,13 +478,13 @@
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-    <nuclide ao="1.6294989443506564e-06" name="Xe136" />
+    <nuclide ao="1.6294989443506556e-06" name="Xe136" />
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@@ -492,34 +492,34 @@
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+    <nuclide ao="4.170161767401383e-10" name="Gd157" />
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+    <nuclide ao="4.5669635738457787e-07" name="Cs135" />
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@@ -534,13 +534,13 @@
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+    <nuclide ao="5.566458985896818e-09" name="Xe135" />
+    <nuclide ao="1.61493933377763e-06" name="Xe136" />
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@@ -548,67 +548,67 @@
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+    <nuclide ao="4.823571467963222e-10" name="Gd157" />
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+    <nuclide ao="4.931332484293642e-09" name="Xe135" />
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@@ -622,8 +622,8 @@
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@@ -631,13 +631,13 @@
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@@ -646,11 +646,11 @@
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@@ -658,7 +658,7 @@
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@@ -673,67 +673,67 @@
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@@ -747,8 +747,8 @@
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@@ -761,7 +761,7 @@
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@@ -775,16 +775,16 @@
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@@ -797,26 +797,26 @@
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@@ -839,26 +839,26 @@
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@@ -867,13 +867,13 @@
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@@ -881,7 +881,7 @@
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@@ -900,21 +900,21 @@
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@@ -922,8 +922,8 @@
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     <nuclide ao="0.001016165183486977" name="U235" />
@@ -934,14 +934,14 @@
   <material depletable="true" id="68" temperature="293.6" volume="0.06674732823364922">
     <density units="sum" />
     <nuclide ao="0.0464035" name="O16" />
-    <nuclide ao="4.001714979821851e-07" name="Cs135" />
+    <nuclide ao="4.0017149798218536e-07" name="Cs135" />
     <nuclide ao="4.601018035351548e-09" name="Gd156" />
     <nuclide ao="1.6199371284731447e-05" name="Gd157" />
-    <nuclide ao="5.923365153621547e-09" name="I135" />
+    <nuclide ao="5.9233651536215515e-09" name="I135" />
     <nuclide ao="9.9948280076224e-22" name="U234" />
     <nuclide ao="0.0010172176953620639" name="U235" />
     <nuclide ao="0.021691863443143826" name="U238" />
-    <nuclide ao="5.099605733937212e-09" name="Xe135" />
+    <nuclide ao="5.099605733937214e-09" name="Xe135" />
     <nuclide ao="6.270359768576665e-07" name="Xe136" />
   </material>
   <material depletable="true" id="69" temperature="293.6" volume="0.06674732823364922">
@@ -950,7 +950,7 @@
     <nuclide ao="0.00011276839999999999" name="O17" />
     <nuclide ao="4.373002216816769e-07" name="Cs135" />
     <nuclide ao="8.10466894697993e-09" name="Gd156" />
-    <nuclide ao="3.980082090165549e-10" name="Gd157" />
+    <nuclide ao="3.9800820901655483e-10" name="Gd157" />
     <nuclide ao="1.0466366392018935e-08" name="I135" />
     <nuclide ao="1.0045621879498482e-05" name="U234" />
     <nuclide ao="0.001013582403388038" name="U235" />
@@ -964,12 +964,12 @@
     <nuclide ao="0.00011276839999999999" name="O17" />
     <nuclide ao="4.3531353442394307e-07" name="Cs135" />
     <nuclide ao="7.81003289792918e-09" name="Gd156" />
-    <nuclide ao="4.2318823058011106e-10" name="Gd157" />
-    <nuclide ao="9.994767275045175e-09" name="I135" />
+    <nuclide ao="4.231882305801109e-10" name="Gd157" />
+    <nuclide ao="9.994767275045177e-09" name="I135" />
     <nuclide ao="1.0044404992700028e-05" name="U234" />
     <nuclide ao="0.00101745168907518" name="U235" />
     <nuclide ao="0.02213450398339581" name="U238" />
-    <nuclide ao="5.08663157763046e-09" name="Xe135" />
+    <nuclide ao="5.086631577630462e-09" name="Xe135" />
     <nuclide ao="1.714351229930211e-06" name="Xe136" />
   </material>
   <material depletable="true" id="71" temperature="293.6" volume="0.06674732823364922">
@@ -983,21 +983,21 @@
     <nuclide ao="1.0044829773222666e-05" name="U234" />
     <nuclide ao="0.001018948265719757" name="U235" />
     <nuclide ao="0.022134724441539442" name="U238" />
-    <nuclide ao="5.21779956108209e-09" name="Xe135" />
+    <nuclide ao="5.2177995610820925e-09" name="Xe135" />
     <nuclide ao="1.6384969094902849e-06" name="Xe136" />
   </material>
   <material depletable="true" id="72" temperature="293.6" volume="0.06674732823364922">
     <density units="sum" />
     <nuclide ao="0.046295399999999994" name="O16" />
     <nuclide ao="0.00011276839999999999" name="O17" />
-    <nuclide ao="4.2989214569673393e-07" name="Cs135" />
+    <nuclide ao="4.298921456967344e-07" name="Cs135" />
     <nuclide ao="7.472175332876386e-09" name="Gd156" />
     <nuclide ao="4.695600230063656e-10" name="Gd157" />
     <nuclide ao="8.590922950164814e-09" name="I135" />
     <nuclide ao="1.0045021051031072e-05" name="U234" />
     <nuclide ao="0.0010198929186005497" name="U235" />
     <nuclide ao="0.02213446910874194" name="U238" />
-    <nuclide ao="4.6952831306275485e-09" name="Xe135" />
+    <nuclide ao="4.695283130627553e-09" name="Xe135" />
     <nuclide ao="1.5908358918951317e-06" name="Xe136" />
   </material>
   <material id="73" temperature="293.6" volume="0.017528298008244847">
diff --git a/tests/regression_tests/deplete_with_transport/test_reference.h5 b/tests/regression_tests/deplete_with_transport/test_reference.h5
index d478d628e..952994b86 100644
Binary files a/tests/regression_tests/deplete_with_transport/test_reference.h5 and b/tests/regression_tests/deplete_with_transport/test_reference.h5 differ
diff --git a/tests/regression_tests/source/results_true.dat b/tests/regression_tests/source/results_true.dat
index 62eaf6eff..f0d69afb5 100644
--- a/tests/regression_tests/source/results_true.dat
+++ b/tests/regression_tests/source/results_true.dat
@@ -1,2 +1,2 @@
 k-combined:
-2.865754E-01 6.762423E-03
+3.073726E-01 2.535074E-03
diff --git a/tests/regression_tests/surface_source/surface_source_true.h5 b/tests/regression_tests/surface_source/surface_source_true.h5
index c26afee86..eb65846d1 100644
Binary files a/tests/regression_tests/surface_source/surface_source_true.h5 and b/tests/regression_tests/surface_source/surface_source_true.h5 differ