Benchmark Analyses of Neutron Streaming Experiments for Proton Accelerator Facilities

In order to estimate the accuracy of the various calculation methods for the neutron streaming through a maze and duct in proton accelerator facilities, we performed benchmark analyses using the radiation shielding design codes. As a result of the benchmark analyses, it is concluded that NMTC/MCNP, MCNPX and DUCT-III are applicable to actual calculation of the duct-streaming radiations for J-PARC.