Impact of MA Temporary Storage Process on the Reduction of Final Disposal Burden in the Advanced Nuclear Fuel Cycle

¹ Tokyo Institute of Technology, Institute of Innovative Research, Laboratory for Zero-Carbon Energy, 2-12-1 Ookayama, Meguro-ku, Tokyo, Japan
² Mitsubishi FBR systems, 33-11, Shiba 5-chome, Minato-ku, Japan
³ Kyoto University, Institute for Integrated Radiation and Nuclear Science, 2, Asashiro-Nishi, Kumatori-cho, Sennan-gun, Osaka, Japan
⁴ Mitsubishi Heavy Industry, 108-8015, 33-11, Shiba 5-chome, Minato-ku, Tokyo, Japan

^* Corresponding author

Published online: 31 January 2025

Abstract

Separating minor actinides (MA) from high-level radioactive waste (HLW) is an effective option for reducing the burden of final disposal. However, the recovered MA must be transmuted in fast reactors (FR) or similar technologies. The widespread deployment of FR is expected in the latter half of the 21st century. In this study, we evaluated the introduction of a temporary MA storage process to bridge the time gap between the early introduction of MA separation and the deployment of FR with adequate transmutation capacity. The results showed that the MA temporary storage process effectively mitigates the burden of final disposal and MA temporary storage allows the amount of recovered MA to be managed independently of the FR capacity.