Neutron Beam Evaluation for NRF in AGN-201K Reactor Using MCNP Simulation

Neutron radiography facility (NRF), is the non-destructive inspection equipment that use intrinsic matter penetration properties of neutron, in the field of NDT (Non-Destructive Testing) with more advantage as compare to X-ray radiography. Neutron radiography is based on the interaction of neutron with nucleus instead of the electron as in X-ray radiography. Even radioisotopes in the same element can be distinguished by the neutron radiography due to its specific cross-section properties. Namely, the neutron radiography is recognized as a complementary technique to the X-ray radiography. In this paper, although neutron radiography facility is generally installed only at high-flux research reactors, the feasibility of thermal column in AGN-201K was evaluated by using MCNP code. Specially, thermal flux level at the exit of beam line through collimator was evaluated in order to check its feasibility for NRF.