Take advantage of np.random.multivariate size option for multiple samples
Take advantage of np.random.multivariate size option for multiple samples

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