Fix k_eff calc for runs with reset in the middle
Fix k_eff calc for runs with reset in the middle

johnnyliu27/openmc,paulromano/openmc,wbinventor/openmc,mit-crpg/openmc,paulromano/openmc,johnnyliu27/openmc,wbinventor/openmc,walshjon/openmc,amandalund/openmc,smharper/openmc,amandalund/openmc,smharper/openmc,liangjg/openmc,mit-crpg/openmc,walshjon/openmc,walshjon/openmc,paulromano/openmc,shikhar413/openmc,johnnyliu27/openmc,amandalund/openmc,wbinventor/openmc,paulromano/openmc,liangjg/openmc,wbinventor/openmc,walshjon/openmc,smharper/openmc,amandalund/openmc,liangjg/openmc,johnnyliu27/openmc,mit-crpg/openmc,liangjg/openmc,mit-crpg/openmc,shikhar413/openmc,shikhar413/openmc,shikhar413/openmc,smharper/openmc