In developing a neutron generator-based security check system for explosives using associated α particles and neutron flight of time technique

it is important to avoid possible influences by the D-T neutron and secondary γ-rays to the inspection equipment

staffs

passengers and ambient environment.In this paper

the MCNP5 code is used to simulate the coupled transport of neutrons and γ-rays

for calculating the shield effect of inspection equipment and the individual dose equivalent.The results show that after effective shielding

the fast neutron equivalent of inspection equipment can be reduced to 3.44% of the source flux

satisfying the shielding requirement.The individual dose equivalent meets the national regulations in specified access areas.The influences to surrounding environment can be neglected.