diff --git a/benchmarks/cullen-sab/problem1/materials.xml b/benchmarks/cullen-sab/problem1/materials.xml
index 315281bc1..083ec34aa 100644
--- a/benchmarks/cullen-sab/problem1/materials.xml
+++ b/benchmarks/cullen-sab/problem1/materials.xml
@@ -22,6 +22,7 @@
     <density value="1.0" units="g/cc" />
     <nuclide name="H-1"  xs="03c" ao="2.0" />
     <nuclide name="O-16" xs="03c" ao="1.0" />
+    <!-- <sab name="lwe7" xs="00t" /> -->
   </material>
 
 </materials>
\ No newline at end of file
diff --git a/benchmarks/cullen-sab/problem2/geometry.xml b/benchmarks/cullen-sab/problem2/geometry.xml
new file mode 100644
index 000000000..8e40e3fb3
--- /dev/null
+++ b/benchmarks/cullen-sab/problem2/geometry.xml
@@ -0,0 +1,22 @@
+<?xml version="1.0"?>
+<geometry>
+
+  <!--
+      ====================================================
+      Description: Simple thermal system from INDC-USA-107
+      Case:        Problem 2 (1/4" pin, 2" lattice pitch)
+      Written By:  Paul Romano
+      Date:        10/30/2011
+      ====================================================
+  -->
+
+  <surface uid="1" type="z-cylinder" coeffs="0. 0. 0.635" />
+  <surface uid="2" type="x-plane" coeffs="-2.54" boundary="reflective" />
+  <surface uid="3" type="x-plane" coeffs="2.54" boundary="reflective" />
+  <surface uid="4" type="y-plane" coeffs="-2.54" boundary="reflective" />
+  <surface uid="5" type="y-plane" coeffs="2.54" boundary="reflective" />
+
+  <cell uid="1" material="1" surfaces="-1" />
+  <cell uid="2" material="2" surfaces="1 2 -3 4 -5" />
+
+</geometry>
\ No newline at end of file
diff --git a/benchmarks/cullen-sab/problem2/materials.xml b/benchmarks/cullen-sab/problem2/materials.xml
new file mode 100644
index 000000000..176631a6e
--- /dev/null
+++ b/benchmarks/cullen-sab/problem2/materials.xml
@@ -0,0 +1,28 @@
+<?xml version="1.0"?>
+<materials>
+
+  <!--
+      ====================================================
+      Description: Simple thermal system from INDC-USA-107
+      Case:        Problem 2 (1/4" pin, 2" lattice pitch)
+      Written By:  Paul Romano
+      Date:        10/30/2011
+      ====================================================
+  -->
+
+  <!-- Fuel composed of 96.5 a/o U-238 and 3.5 a/o U-235 -->
+  <material uid="1">
+    <density value="18.8" units="g/cc" />
+    <nuclide name="U-238" xs="03c" ao="96.5" />
+    <nuclide name="U-235" xs="03c" ao="3.5" />
+  </material>
+
+  <!-- Water at 1 g/cc -->
+  <material uid="2">
+    <density value="1.0" units="g/cc" />
+    <nuclide name="H-1"  xs="03c" ao="2.0" />
+    <nuclide name="O-16" xs="03c" ao="1.0" />
+    <!-- <sab name="lwe7" xs="00t" /> -->
+  </material>
+
+</materials>
\ No newline at end of file
diff --git a/benchmarks/cullen-sab/problem2/settings.xml b/benchmarks/cullen-sab/problem2/settings.xml
new file mode 100644
index 000000000..c3b33399b
--- /dev/null
+++ b/benchmarks/cullen-sab/problem2/settings.xml
@@ -0,0 +1,28 @@
+<?xml version="1.0"?>
+<settings>
+
+  <!--
+      ====================================================
+      Description: Simple thermal system from INDC-USA-107
+      Case:        Problem 2 (1/4" pin, 2" lattice pitch)
+      Written By:  Paul Romano
+      Date:        10/30/2011
+      ====================================================
+  -->
+
+  <xslibrary path="/opt/serpent/xsdata/endfb7/xsdata" />
+
+  <criticality>
+    <cycles>500</cycles>
+    <inactive>50</inactive>
+    <particles>10000</particles>
+  </criticality>
+
+  <verbosity value="7" />
+
+  <source>
+    <type>box</type>
+    <coeffs>-2 -2 -2  2  2  2</coeffs>
+  </source>
+
+</settings>
\ No newline at end of file
diff --git a/benchmarks/cullen-sab/problem2/tallies.xml b/benchmarks/cullen-sab/problem2/tallies.xml
new file mode 100644
index 000000000..03b4e0570
--- /dev/null
+++ b/benchmarks/cullen-sab/problem2/tallies.xml
@@ -0,0 +1,21 @@
+<?xml version="1.0"?>
+<tallies>
+
+  <!--
+      ====================================================
+      Description: Simple thermal system from INDC-USA-107
+      Case:        Problem 2 (1/4" pin, 2" lattice pitch)
+      Written By:  Paul Romano
+      Date:        10/30/2011
+      ====================================================
+  -->
+
+  <tally id="1">
+    <filters>
+      <cell>1 2</cell>
+    </filters>
+
+    <macros>total scatter nu-scatter absorption fission nu-fission</macros>
+  </tally>
+
+</tallies>
\ No newline at end of file
diff --git a/benchmarks/cullen-sab/problem3/geometry.xml b/benchmarks/cullen-sab/problem3/geometry.xml
new file mode 100644
index 000000000..c0b5bc8a2
--- /dev/null
+++ b/benchmarks/cullen-sab/problem3/geometry.xml
@@ -0,0 +1,22 @@
+<?xml version="1.0"?>
+<geometry>
+
+  <!--
+      ====================================================
+      Description: Simple thermal system from INDC-USA-107
+      Case:        Problem 3 (1/8" pin, 2" lattice pitch)
+      Written By:  Paul Romano
+      Date:        10/30/2011
+      ====================================================
+  -->
+
+  <surface uid="1" type="z-cylinder" coeffs="0. 0. 0.3175" />
+  <surface uid="2" type="x-plane" coeffs="-2.54" boundary="reflective" />
+  <surface uid="3" type="x-plane" coeffs="2.54" boundary="reflective" />
+  <surface uid="4" type="y-plane" coeffs="-2.54" boundary="reflective" />
+  <surface uid="5" type="y-plane" coeffs="2.54" boundary="reflective" />
+
+  <cell uid="1" material="1" surfaces="-1" />
+  <cell uid="2" material="2" surfaces="1 2 -3 4 -5" />
+
+</geometry>
\ No newline at end of file
diff --git a/benchmarks/cullen-sab/problem3/materials.xml b/benchmarks/cullen-sab/problem3/materials.xml
new file mode 100644
index 000000000..9e71f6862
--- /dev/null
+++ b/benchmarks/cullen-sab/problem3/materials.xml
@@ -0,0 +1,28 @@
+<?xml version="1.0"?>
+<materials>
+
+  <!--
+      ====================================================
+      Description: Simple thermal system from INDC-USA-107
+      Case:        Problem 3 (1/8" pin, 2" lattice pitch)
+      Written By:  Paul Romano
+      Date:        10/30/2011
+      ====================================================
+  -->
+
+  <!-- Fuel composed of 30 a/o U-238 and 70 a/o U-235 -->
+  <material uid="1">
+    <density value="18.8" units="g/cc" />
+    <nuclide name="U-238" xs="03c" ao="30.0" />
+    <nuclide name="U-235" xs="03c" ao="70.0" />
+  </material>
+
+  <!-- Water at 1 g/cc -->
+  <material uid="2">
+    <density value="1.0" units="g/cc" />
+    <nuclide name="H-1"  xs="03c" ao="2.0" />
+    <nuclide name="O-16" xs="03c" ao="1.0" />
+    <!-- <sab name="lwe7" xs="00t" /> -->
+  </material>
+
+</materials>
\ No newline at end of file
diff --git a/benchmarks/cullen-sab/problem3/settings.xml b/benchmarks/cullen-sab/problem3/settings.xml
new file mode 100644
index 000000000..b483f3e38
--- /dev/null
+++ b/benchmarks/cullen-sab/problem3/settings.xml
@@ -0,0 +1,28 @@
+<?xml version="1.0"?>
+<settings>
+
+  <!--
+      ====================================================
+      Description: Simple thermal system from INDC-USA-107
+      Case:        Problem 3 (1/8" pin, 2" lattice pitch)
+      Written By:  Paul Romano
+      Date:        10/30/2011
+      ====================================================
+  -->
+
+  <xslibrary path="/opt/serpent/xsdata/endfb7/xsdata" />
+
+  <criticality>
+    <cycles>500</cycles>
+    <inactive>50</inactive>
+    <particles>10000</particles>
+  </criticality>
+
+  <verbosity value="7" />
+
+  <source>
+    <type>box</type>
+    <coeffs>-2 -2 -2  2  2  2</coeffs>
+  </source>
+
+</settings>
\ No newline at end of file
diff --git a/benchmarks/cullen-sab/problem3/tallies.xml b/benchmarks/cullen-sab/problem3/tallies.xml
new file mode 100644
index 000000000..d8a352c0a
--- /dev/null
+++ b/benchmarks/cullen-sab/problem3/tallies.xml
@@ -0,0 +1,21 @@
+<?xml version="1.0"?>
+<tallies>
+
+  <!--
+      ====================================================
+      Description: Simple thermal system from INDC-USA-107
+      Case:        Problem 3 (1/8" pin, 2" lattice pitch)
+      Written By:  Paul Romano
+      Date:        10/30/2011
+      ====================================================
+  -->
+
+  <tally id="1">
+    <filters>
+      <cell>1 2</cell>
+    </filters>
+
+    <macros>total scatter nu-scatter absorption fission nu-fission</macros>
+  </tally>
+
+</tallies>
\ No newline at end of file