<?xml version='1.0' encoding='utf-8'?>
<geometry>
  <cell id="1" material="1" region="-1" universe="1" />
  <cell id="2" material="2" region="1" universe="1" />
  <cell fill="2" id="3" region="2 -3 4 -5" universe="3" />
  <lattice id="2">
    <pitch>1.2 1.2</pitch>
    <outer>1</outer>
    <dimension>2 2</dimension>
    <lower_left>-1.2 -1.2</lower_left>
    <universes>
1 1 
1 1 </universes>
  </lattice>
  <surface coeffs="0.0 0.0 0.4" id="1" type="z-cylinder" />
  <surface boundary="reflective" coeffs="-1.2" id="2" name="minimum x" type="x-plane" />
  <surface boundary="reflective" coeffs="1.2" id="3" name="maximum x" type="x-plane" />
  <surface boundary="reflective" coeffs="-1.2" id="4" name="minimum y" type="y-plane" />
  <surface boundary="reflective" coeffs="1.2" id="5" name="maximum y" type="y-plane" />
</geometry>
<?xml version='1.0' encoding='utf-8'?>
<materials>
  <material depletable="true" id="1" name="UO2">
    <density units="g/cm3" value="10.29769" />
    <nuclide ao="4.4843e-06" name="U234" />
    <nuclide ao="0.00055815" name="U235" />
    <nuclide ao="0.022408" name="U238" />
    <nuclide ao="0.045829" name="O16" />
  </material>
  <material id="2" name="light water">
    <density units="g/cm3" value="1.0" />
    <nuclide ao="2.0" name="H1" />
    <nuclide ao="1.0" name="O16" />
    <sab name="c_H_in_H2O" />
  </material>
</materials>
<?xml version='1.0' encoding='utf-8'?>
<settings>
  <run_mode>eigenvalue</run_mode>
  <particles>1000</particles>
  <batches>10</batches>
  <inactive>5</inactive>
</settings>
<?xml version='1.0' encoding='utf-8'?>
<tallies>
  <filter id="1" type="energy">
    <bins>0.0 0.253 1000.0 1000000.0 20000000.0</bins>
  </filter>
  <filter id="2" type="distribcell">
    <bins>1</bins>
  </filter>
  <tally id="1" name="distribcell tally">
    <filters>1 2</filters>
    <nuclides>U234 U235 U238</nuclides>
    <scores>nu-fission total</scores>
  </tally>
</tallies>
