OpenMC/tests/regression_tests/entropy/settings.xml

<?xml version="1.0"?>
<settings>

  <run_mode>eigenvalue</run_mode>
  <batches>10</batches>
  <inactive>5</inactive>
  <particles>1000</particles>

  <source>
    <space type="box">
      <parameters>-4 -4 -4  4  4  4</parameters>
    </space>
  </source>

  <mesh id="1">
    <dimension>10 10 10</dimension>
    <lower_left>-10. -10. -10.</lower_left>
    <upper_right>10. 10. 10.</upper_right>
  </mesh>

  <entropy_mesh>1</entropy_mesh>

</settings>