OpenMC/tests/regression_tests/quadric_surfaces/settings.xml

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

  <run_mode>eigenvalue</run_mode>
  <batches>4</batches>
  <inactive>0</inactive>
  <particles>1000</particles>

  <source>
    <space type="point" parameters="0. 0. 0." />
  </source>

</settings>