<?xml version='1.0' encoding='utf-8'?>
<model>
  <materials>
    <material depletable="true" id="1" name="UO2 fuel at 2.4% wt enrichment">
      <density units="g/cc" value="10.0"/>
      <nuclide ao="1.0" name="U238"/>
      <nuclide ao="0.02" name="U235"/>
      <nuclide ao="2.0" name="O16"/>
    </material>
    <material id="2" name="Borated water">
      <density units="g/cm3" value="1"/>
      <nuclide ao="0.0001" name="B10"/>
      <nuclide ao="2.0" name="H1"/>
      <nuclide ao="1.0" name="O16"/>
    </material>
  </materials>
  <geometry>
    <cell id="1" material="1" name="fuel" region="-1" universe="1"/>
    <cell id="2" material="2" name="water" region="1 -3 4 -5" universe="1"/>
    <cell fill="1" id="3" name="root cell" region="2 -3 4 -5" universe="0"/>
    <surface coeffs="0 0 1" id="1" name="Fuel OR" type="z-cylinder"/>
    <surface boundary="vacuum" coeffs="-2" id="2" name="left" type="x-plane"/>
    <surface boundary="reflective" coeffs="2" id="3" name="right" type="x-plane"/>
    <surface boundary="reflective" coeffs="-2" id="4" name="bottom" type="y-plane"/>
    <surface boundary="reflective" coeffs="2" id="5" name="top" type="y-plane"/>
  </geometry>
  <settings>
    <run_mode>eigenvalue</run_mode>
    <particles>1000</particles>
    <batches>10</batches>
    <inactive>0</inactive>
    <source particle="neutron" strength="1.0" type="independent">
      <space type="fission">
        <parameters>-0.62992 -0.62992 -1 0.62992 0.62992 1</parameters>
      </space>
    </source>
  </settings>
  <tallies>
    <filter id="5" type="cellfrom">
      <bins>1</bins>
    </filter>
    <filter id="6" type="cell">
      <bins>2</bins>
    </filter>
    <filter id="1" type="energy">
      <bins>0.0 4000000.0 20000000.0</bins>
    </filter>
    <filter id="2" type="polar">
      <bins>0.0 0.7853981633974483 3.141592653589793</bins>
    </filter>
    <filter id="3" type="azimuthal">
      <bins>0.0 0.7853981633974483 3.141592653589793</bins>
    </filter>
    <filter id="4" type="surface">
      <bins>1</bins>
    </filter>
    <filter id="7" type="materialfrom">
      <bins>2</bins>
    </filter>
    <filter id="8" type="cell">
      <bins>1</bins>
    </filter>
    <filter id="10" type="surface">
      <bins>2</bins>
    </filter>
    <filter id="11" type="surface">
      <bins>3</bins>
    </filter>
    <tally id="1" name="fuel_to_water_1">
      <filters>5 6 1 2 3</filters>
      <scores>current</scores>
    </tally>
    <tally id="2" name="fuel_to_water_2">
      <filters>5 4 1 2 3</filters>
      <scores>current</scores>
    </tally>
    <tally id="3" name="water_to_fuel_1">
      <filters>7 8 1 2 3</filters>
      <scores>current</scores>
    </tally>
    <tally id="4" name="water_to_fuel_2">
      <filters>7 4 1 2 3</filters>
      <scores>current</scores>
    </tally>
    <tally id="5" name="net_cylinder">
      <filters>4 1 2 3</filters>
      <scores>current</scores>
    </tally>
    <tally id="6" name="leakage_left">
      <filters>10 1 2 3</filters>
      <scores>current</scores>
    </tally>
    <tally id="7" name="net_right">
      <filters>11 1</filters>
      <scores>current</scores>
    </tally>
    <tally id="8" name="net_right">
      <filters>11 1</filters>
      <scores>current</scores>
    </tally>
  </tallies>
</model>
