VALIDATION OF NUCLEAR CALCULATIONS WITH THE FENDL E-1.1 AND JENDL FUSION FILE BASED ON A BULK-SHIELDING EXPERIMENT OF A LARGE TYPE-316 STAINLESS-STEEL ASSEMBLY/

An analysis of the bulk-shielding experiment on Type 316 stainless ste el (SS316) for deuterium-tritium neutrons was performed at the Japan A tomic Energy Research institute Fusion Neutronics Source to validate t he nuclear data and transport codes used in the shielding design of th e International Thermonuclear Experimental Reactor (ITER). The MCNP-4A and DORT3.1 codes with contemporary nuclear data libraries based on t he FENDL/E-1.1 and JENDL Fusion File were used for the analyses. The M CNP calculations with the FENDL/E-1.1 and JENDL Fusion File agree with in 30% with the measured data. The DORT calculations with the FENDL/E- 1.1 and JENDL Fusion File with an energy structure of 175 neutrons and 42 gamma rays and a self-shielding correction represent the measureme nts with almost the same accuracy as the MCNP calculations. It is conc luded that the uncertainty of the shielding calculation for the bulk-s hielding configuration of MCNP-4A and DORT3.1 with the FENDL/E-1.1 and JENDL Fusion File on a 900-mm-thick SS316 shield is within 30%.