MCNP-PoliMi Simulation of Neutron Radiography

The Nuclear Materials Identification System (NMIS) with adeuterium–tritium neutron source has been used to image fissilematerial inside containers to determine geometry. This paperinvestigates the possibility that the NMIS could be used todetermine the mass of UO3 powder of variable shape or densityin a container of arbitrary but known shape. The MCNPPoliMicomputer code was used to model measurements of severalfill scenarios of a trough-shaped container by the NMIS toestimate how accurately the mass of the UO3 powder could bedetermined.