Research on Neutron Source Multiplication Method in Nuclear Critical Safety

The paper concernes in the neutron source multiplication method research in nuclear critical safety. Based on the neutron diffusion equation with external neutron source the effective sub-critical multiplication factor k_s is deduced, and k_s is different to the effective neutron multiplication factor k_(eff) in the case of sub-critical system with external neutron source. The verification experiment on the sub-critical system indicates that the parameter measured with neutron source multiplication method is k_s, and k_s is related to the external neutron source position in sub-critical system and external neutron source spectrum. The relation (between) k_s and k_(eff) and the effect of them on nuclear critical safety is discussed in the (paper.)