<?xml version='1.0' encoding='utf-8'?>
<model>
  <materials>
    <material depletable="true" id="1">
      <density units="g/cc" value="4.5"/>
      <nuclide ao="1.0" name="U235"/>
    </material>
  </materials>
  <geometry>
    <cell id="1" material="1" region="-1 2 -3 -4 5 6" universe="1"/>
    <surface boundary="periodic" coeffs="8.660254037844386" id="1" periodic_surface_id="2" type="x-plane"/>
    <surface boundary="periodic" coeffs="-8.660254037844386" id="2" periodic_surface_id="1" type="x-plane"/>
    <surface boundary="periodic" coeffs="0.5773502691896257 1.0 0.0 10.0" id="3" periodic_surface_id="6" type="plane"/>
    <surface boundary="periodic" coeffs="-0.5773502691896257 1.0 0.0 10.0" id="4" periodic_surface_id="5" type="plane"/>
    <surface boundary="periodic" coeffs="-0.5773502691896257 1.0 0.0 -10.0" id="5" periodic_surface_id="4" type="plane"/>
    <surface boundary="periodic" coeffs="0.5773502691896257 1.0 0.0 -10.0" id="6" periodic_surface_id="3" type="plane"/>
  </geometry>
  <settings>
    <run_mode>eigenvalue</run_mode>
    <particles>1000</particles>
    <batches>5</batches>
    <inactive>0</inactive>
  </settings>
  </model>
