<?xml version='1.0' encoding='utf-8'?>
<model>
  <materials>
    <material depletable="true" id="22" name="fuel">
      <density units="g/cc" value="4.5"/>
      <nuclide ao="1.0" name="U235"/>
    </material>
    <material id="23" name="zircaloy">
      <density units="g/cc" value="5.77"/>
      <nuclide ao="0.5145" name="Zr90"/>
      <nuclide ao="0.1122" name="Zr91"/>
      <nuclide ao="0.1715" name="Zr92"/>
      <nuclide ao="0.1738" name="Zr94"/>
      <nuclide ao="0.028" name="Zr96"/>
    </material>
    <material id="24" name="water">
      <density units="atom/b-cm" value="0.07416"/>
      <nuclide ao="2.0" name="H1"/>
      <nuclide ao="1.0" name="O16"/>
    </material>
  </materials>
  <geometry>
    <cell id="22" material="22" name="fuel" region="127 -128 129 -130 131 -132" universe="8"/>
    <cell id="23" material="23" name="clad" region="(-127 | 128 | -129 | 130 | -131 | 132) (133 -134 135 -136 137 -138)" universe="8"/>
    <cell id="24" material="24" name="water" region="(-133 | 134 | -135 | 136 | -137 | 138) (139 -140 141 -142 143 -144)" universe="8"/>
    <surface coeffs="-5.0" id="127" name="minimum x" type="x-plane"/>
    <surface coeffs="5.0" id="128" name="maximum x" type="x-plane"/>
    <surface coeffs="-5.0" id="129" name="minimum y" type="y-plane"/>
    <surface coeffs="5.0" id="130" name="maximum y" type="y-plane"/>
    <surface coeffs="-5.0" id="131" name="minimum z" type="z-plane"/>
    <surface coeffs="5.0" id="132" name="maximum z" type="z-plane"/>
    <surface coeffs="-6.0" id="133" name="minimum x" type="x-plane"/>
    <surface coeffs="6.0" id="134" name="maximum x" type="x-plane"/>
    <surface coeffs="-6.0" id="135" name="minimum y" type="y-plane"/>
    <surface coeffs="6.0" id="136" name="maximum y" type="y-plane"/>
    <surface coeffs="-6.0" id="137" name="minimum z" type="z-plane"/>
    <surface coeffs="6.0" id="138" name="maximum z" type="z-plane"/>
    <surface boundary="vacuum" coeffs="-10" id="139" name="minimum x" type="x-plane"/>
    <surface boundary="vacuum" coeffs="10" id="140" name="maximum x" type="x-plane"/>
    <surface boundary="vacuum" coeffs="-10" id="141" name="minimum y" type="y-plane"/>
    <surface boundary="vacuum" coeffs="10" id="142" name="maximum y" type="y-plane"/>
    <surface boundary="vacuum" coeffs="-10" id="143" name="minimum z" type="z-plane"/>
    <surface boundary="vacuum" coeffs="10" id="144" name="maximum z" type="z-plane"/>
  </geometry>
  <settings>
    <run_mode>fixed source</run_mode>
    <particles>100</particles>
    <batches>10</batches>
    <source strength="1.0">
      <space origin="0.0 0.0 0.0" type="spherical">
        <r parameters="0.0 0.0" type="uniform"/>
        <cos_theta type="discrete">
          <parameters>1.0 1.0</parameters>
        </cos_theta>
        <phi type="discrete">
          <parameters>0.0 1.0</parameters>
        </phi>
      </space>
      <angle reference_uvw="-1.0 0.0 0.0" type="monodirectional"/>
      <energy type="discrete">
        <parameters>15000000.0 1.0</parameters>
      </energy>
    </source>
  </settings>
  <tallies>
    <mesh id="15">
      <dimension>10 10 10</dimension>
      <lower_left>-10.0 -10.0 -10.0</lower_left>
      <upper_right>10.0 10.0 10.0</upper_right>
    </mesh>
    <mesh id="16" library="moab" type="unstructured">
      <filename>test_mesh_tets.exo</filename>
    </mesh>
    <filter id="15" type="mesh">
      <bins>15</bins>
    </filter>
    <filter id="16" type="mesh">
      <bins>16</bins>
    </filter>
    <tally id="15" name="regular mesh tally">
      <filters>15</filters>
      <scores>flux</scores>
      <estimator>tracklength</estimator>
    </tally>
    <tally id="16" name="unstructured mesh tally">
      <filters>16</filters>
      <scores>flux</scores>
      <estimator>tracklength</estimator>
    </tally>
  </tallies>
</model>
