<?xml version='1.0' encoding='utf-8'?>
<geometry>
  <cell id="1" material="1" name="cell 1" region="4 -5 6 -7" universe="0" />
  <surface boundary="reflective" coeffs="-5.0" id="4" name="left" type="x-plane" />
  <surface boundary="vacuum" coeffs="5.0" id="5" name="right" type="x-plane" />
  <surface boundary="reflective" coeffs="-5.0" id="6" name="bottom" type="y-plane" />
  <surface boundary="reflective" coeffs="5.0" id="7" name="top" type="y-plane" />
</geometry>
<?xml version='1.0' encoding='utf-8'?>
<materials>
  <cross_sections>./mgxs.h5</cross_sections>
  <material id="1" name="UO2 fuel">
    <density units="macro" value="1.1" />
    <macroscopic name="UO2" />
  </material>
</materials>
<?xml version='1.0' encoding='utf-8'?>
<settings>
  <run_mode>eigenvalue</run_mode>
  <particles>100</particles>
  <batches>10</batches>
  <inactive>5</inactive>
  <source strength="1.0">
    <space type="box">
      <parameters>-5 -5 -5 5 5 5</parameters>
    </space>
  </source>
  <energy_mode>multi-group</energy_mode>
</settings>
