<?xml version='1.0' encoding='utf-8'?>
<model>
  <materials>
    <material depletable="true" id="1">
      <density units="g/cc" value="10.0"/>
      <nuclide ao="1.0" name="U235"/>
    </material>
    <material id="2">
      <density units="g/cc" value="0.1"/>
      <nuclide ao="0.1" name="H1"/>
    </material>
  </materials>
  <geometry>
    <cell id="1" material="1" region="-1" universe="1"/>
    <cell id="2" material="2" region="1" universe="1"/>
    <cell fill="1" id="3" region="2 -3 4 -5 6 -8" rotation="10 20 30" universe="2"/>
    <cell fill="1" id="4" region="2 -3 4 -5 8 -7" translation="0 0 15" universe="2"/>
    <surface coeffs="1.0 0.0 0.0 5.0" id="1" type="sphere"/>
    <surface boundary="vacuum" coeffs="-7.5" id="2" name="minimum x" type="x-plane"/>
    <surface boundary="vacuum" coeffs="7.5" id="3" name="maximum x" type="x-plane"/>
    <surface boundary="vacuum" coeffs="-7.5" id="4" name="minimum y" type="y-plane"/>
    <surface boundary="vacuum" coeffs="7.5" id="5" name="maximum y" type="y-plane"/>
    <surface boundary="vacuum" coeffs="-7.5" id="6" type="z-plane"/>
    <surface boundary="vacuum" coeffs="22.5" id="7" type="z-plane"/>
    <surface coeffs="7.5" id="8" type="z-plane"/>
  </geometry>
  <settings>
    <run_mode>eigenvalue</run_mode>
    <particles>10000</particles>
    <batches>10</batches>
    <inactive>5</inactive>
    <source particle="neutron" strength="1.0" type="independent">
      <space type="box">
        <parameters>-4.0 -4.0 -4.0 4.0 4.0 4.0</parameters>
      </space>
    </source>
  </settings>
  </model>
