Investigation of metal hydrides applicability as neutron moderator and shielding by MCNPX

In this research, the applicability of several metal hydrides as neutron moderator and shielding for D-D fusion sources has been investigated by MCNPX code. The results have been investigated in three steps to find the materials with lower thermal, fast and total neutron fluxes than conventional shielding materials. The results show relative advantages of LaNi5H6, VH, TiH2, TaH, Mg (BH4)2, YH2, NbH and LaH3 metal hydrides in reducing the energy of D-D neutron sources, so that utilization of these hydride compounds as a part of the neutron moderator or shielding will be very effective in reducing the volume of nuclear facilities.