corrected 1e6 MeV error
corrected 1e6 MeV error

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