write matrices when option is set
write matrices when option is set

nhorelik/openmc,liangjg/openmc,paulromano/openmc,liangjg/openmc,amandalund/openmc,mit-crpg/openmc,johnnyliu27/openmc,mjlong/openmc,bhermanmit/openmc,sxds/opemmc,lilulu/openmc,walshjon/openmc,lilulu/openmc,samuelshaner/openmc,amandalund/openmc,liangjg/openmc,mit-crpg/openmc,shikhar413/openmc,wbinventor/openmc,samuelshaner/openmc,paulromano/openmc,wbinventor/openmc,samuelshaner/openmc,shikhar413/openmc,paulromano/openmc,johnnyliu27/openmc,walshjon/openmc,smharper/openmc,mjlong/openmc,shikhar413/openmc,kellyrowland/openmc,samuelshaner/openmc,walshjon/openmc,smharper/openmc,kellyrowland/openmc,shikhar413/openmc,liangjg/openmc,wbinventor/openmc,bhermanmit/openmc,sxds/opemmc,smharper/openmc,wbinventor/openmc,nhorelik/openmc,johnnyliu27/openmc,amandalund/openmc,mit-crpg/openmc,smharper/openmc,lilulu/openmc,mit-crpg/openmc,amandalund/openmc,paulromano/openmc,walshjon/openmc,johnnyliu27/openmc