<?xml version='1.0' encoding='utf-8'?>
<geometry>
  <cell id="1" material="1" region="1 -2" universe="1" />
  <cell id="2" material="2" region="2 -3" universe="1" />
  <cell id="3" material="3" region="3 -4" universe="1" />
  <cell id="4" material="4" region="4 -5" universe="1" />
  <surface boundary="vacuum" coeffs="-10" id="1" type="x-plane" />
  <surface coeffs="-5" id="2" type="x-plane" />
  <surface coeffs="0" id="3" type="x-plane" />
  <surface coeffs="5" id="4" type="x-plane" />
  <surface boundary="vacuum" coeffs="10" id="5" type="x-plane" />
</geometry>
<?xml version='1.0' encoding='utf-8'?>
<materials>
  <material depletable="true" id="1">
    <density units="g/cc" value="4.5" />
    <nuclide ao="1.0" name="U235" />
    <nuclide ao="1.0" name="H1" />
    <sab fraction="0.5" name="c_H_in_H2O" />
  </material>
  <material depletable="true" id="2">
    <density units="g/cc" value="4.5" />
    <nuclide ao="1.0" name="U235" />
    <nuclide ao="1.0" name="C0" />
    <sab name="c_Graphite" />
  </material>
  <material depletable="true" id="3">
    <density units="g/cc" value="4.5" />
    <nuclide ao="1.0" name="U235" />
    <nuclide ao="1.0" name="Be9" />
    <nuclide ao="1.0" name="O16" />
    <sab name="c_Be_in_BeO" />
    <sab name="c_O_in_BeO" />
  </material>
  <material depletable="true" id="4">
    <density units="g/cm3" value="5.90168" />
    <nuclide ao="0.3" name="H1" />
    <nuclide ao="0.15" name="Zr90" />
    <nuclide ao="0.1" name="Zr91" />
    <nuclide ao="0.1" name="Zr92" />
    <nuclide ao="0.05" name="Zr94" />
    <nuclide ao="0.05" name="Zr96" />
    <nuclide ao="0.1" name="U235" />
    <nuclide ao="0.15" name="U238" />
    <sab name="c_Zr_in_ZrH" />
    <sab name="c_H_in_ZrH" />
  </material>
</materials>
<?xml version='1.0' encoding='utf-8'?>
<settings>
  <run_mode>eigenvalue</run_mode>
  <particles>400</particles>
  <batches>5</batches>
  <inactive>0</inactive>
  <source strength="1.0">
    <space type="box">
      <parameters>-4 -4 -4 4 4 4</parameters>
    </space>
  </source>
</settings>
