OpenMC/tests/regression_tests/trigger_batch_interval/settings.xml

<?xml version="1.0"?>
<settings>
  <run_mode>eigenvalue</run_mode>
  <batches>15</batches>
  <inactive>5</inactive>
  <particles>1000</particles>
  <keff_trigger>
    <type>std_dev</type>
    <threshold>0.004</threshold>
  </keff_trigger>

  <trigger>
    <active>true</active>
    <max_batches>30</max_batches>
    <batch_interval>1</batch_interval>
  </trigger>

  <source>
    <space>
      <type>point</type>
      <parameters>0.0 0.0 0.0</parameters>
    </space>
  </source>

</settings>