[3J09-11] Nuclear Non-proliferation and Safeguards

[3J11] Feasibility study on innovative small and medium modular reactor with inherent nuclear safety and non-proliferation features

(1)Uranium silicide fuel with MA and/or RepU

*Natsumi Mitsuboshi¹, Hiroshi Sagara¹ (1. Tokyo Tech)

Keywords:Safeguards, Nuclear security, Nuclear safety, Accident Tolerant Fuel, Uranium silicide fuel, Small Modular Reacotr

The aim of this study is to investigate nuclear characteristics of small and medium modular reactor with inherent safety and non-proliferation features by applying uranium silicide(U₃Si₂) fuel with Reprocessed Uranium(RepU) or minor actinide(MA) and by small amounts of nuclear material inventories. RepU and MA are used in U3Si2 fuel to control isotopic ratio of Pu. Basic nuclear characteristic showed that safety coefficients of U₃Si₂ fuel with RepU and MA were almost equal to UO₂ fuel. In non-proliferation analysis, it was found that material attractiveness of U₃Si₂ with RepU or MA were reduced because of chemical stability of U₃Si₂ fuel and higher isotopic ratio of ²³⁸Pu from RepU and MA.