changed box to point source and threading works now
changed box to point source and threading works now

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