Fix units on #750
Fix units on #750

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