Basic research programs of vitrification technology for waste volume reduction, 99; Radiation impact assessment on mechanical property of rubber materials for improving devices durability of MA separation system by extraction chromatography

Hasegawa, Kenta; Ambai, Hiromu ; Watanabe, So  ; Okamura, Nobuo ; Watanabe, Masayuki; Sano, Yuichi   ; Takeuchi, Masayuki 

Separation of minor actinides (MA; Am, Cm) is one of the important issues to reduce the volume of radioactive waste. Previous researches have promoted development of separation flows, safety assessment and engineering scale equipment, while long-term equipment durability for radiation and nitric acid is required for putting MA separation system into practical use. We focused on diaphragm composed of rubber materials on feed pump in contact with high-level radioactive liquid waste (HLLW). In this study, we report radiation impact assessment on mechanical property of diaphragm candidate materials which were degraded by gamma-ray irradiation in acidic or stress loading condition.