<?xml version='1.0' encoding='utf-8'?>
<model>
  <materials>
    <cross_sections>mg_lib.h5</cross_sections>
    <material id="1">
      <density units="g/cc" value="1.0"/>
      <nuclide ao="2.0" name="H1"/>
      <nuclide ao="1.0" name="O16"/>
      <nuclide ao="0.0001" name="B10"/>
    </material>
    <material depletable="true" id="2">
      <density units="g/cc" value="4.5"/>
      <nuclide ao="1.0" name="U235"/>
      <nuclide ao="0.1" name="Mo99"/>
    </material>
  </materials>
  <geometry>
    <cell id="1" material="2" region="-1 -3 5" universe="0"/>
    <cell id="2" material="1" region="-2 3" universe="0"/>
    <cell id="3" material="1" region="-4 -3" universe="0"/>
    <surface boundary="vacuum" coeffs="0.0 0.0 1.0" id="1" type="z-cylinder"/>
    <surface boundary="vacuum" coeffs="0.0 0.0 5.0 1.0" id="2" type="sphere"/>
    <surface coeffs="5.0" id="3" type="z-plane"/>
    <surface boundary="vacuum" coeffs="0.0 0.0 -5.0 1.0" id="4" type="sphere"/>
    <surface coeffs="-5.0" id="5" type="z-plane"/>
  </geometry>
  <settings>
    <run_mode>volume</run_mode>
    <energy_mode>multi-group</energy_mode>
    <volume_calc>
      <domain_type>cell</domain_type>
      <domain_ids>1 2 3</domain_ids>
      <samples>100000</samples>
      <lower_left>-1.0 -1.0 -6.0</lower_left>
      <upper_right>1.0 1.0 6.0</upper_right>
    </volume_calc>
    <volume_calc>
      <domain_type>material</domain_type>
      <domain_ids>1 2</domain_ids>
      <samples>100000</samples>
      <lower_left>-1.0 -1.0 -6.0</lower_left>
      <upper_right>1.0 1.0 6.0</upper_right>
    </volume_calc>
    <volume_calc>
      <domain_type>universe</domain_type>
      <domain_ids>0</domain_ids>
      <samples>100000</samples>
      <lower_left>-1.0 -1.0 -6.0</lower_left>
      <upper_right>1.0 1.0 6.0</upper_right>
    </volume_calc>
    <volume_calc>
      <domain_type>cell</domain_type>
      <domain_ids>1 2 3</domain_ids>
      <samples>100</samples>
      <lower_left>-1.0 -1.0 -6.0</lower_left>
      <upper_right>1.0 1.0 6.0</upper_right>
      <threshold threshold="0.1" type="std_dev"/>
    </volume_calc>
    <volume_calc>
      <domain_type>material</domain_type>
      <domain_ids>1 2</domain_ids>
      <samples>100</samples>
      <lower_left>-1.0 -1.0 -6.0</lower_left>
      <upper_right>1.0 1.0 6.0</upper_right>
      <threshold threshold="0.1" type="rel_err"/>
    </volume_calc>
    <volume_calc>
      <domain_type>cell</domain_type>
      <domain_ids>1 2 3</domain_ids>
      <samples>100</samples>
      <lower_left>-1.0 -1.0 -6.0</lower_left>
      <upper_right>1.0 1.0 6.0</upper_right>
      <threshold threshold="0.05" type="variance"/>
    </volume_calc>
  </settings>
  </model>
