Investigation of feasible approaches to MSR safeguards

Abstract

this was done by comparing the expected burnup of normal operation with neutron emissions. Finally, gamma ray signature analysis was used to idetify changes in plutonium and uranium yields which can be used to detect nuclear fuel diversion. These methods showed the feasibility to MSR safeguards with some limitations. Therefore addiltional research was suggested for further investigation.

this defined expected normal MSR operation. Next, burnup monitoring was used to measure neutron emissions in the circulating nuclear fuel, to detect nuclear fuel diversion

Fourth-generation nuclear reactors are being developed as interest in the nuclear industry increases due to the need for carbon neutrality while energy demand continues to rise. The molten salt reactor (MSR) is attracting attention as a reactor expected to have strong safety features and high thermal efficiency. However, until now, there has been little research on MSR safeguards. Unlike conventional reactors with solid nuclear fuel, MSRs predominantly have liquid nuclear fuel. For this reason it is not possible to apply the existing safeguards. This research investigated three potentially effective methods that are not applied at existing reactors as safeguards. First, process modeling was used to analyze the overall flow of nuclear fuel and the amount of fissile material