[1A04-08] Engineered Barrier

[1A07] Impact on geological disposal due to prolonged cooling period of spent fuel before reprocessing and study of mitigation measures

(4) Effects of mitigation measures

*Takao Ikeda¹, Yasuhiro Suyama², Susumu Tosha³, Kazuyoshi Takenobu⁴, Masakazu Chijimatsu⁵, Susumu Sakashita⁶, Junji Imai⁷, Atsushi Horio⁸, Takamasa Kanda⁹, Takashi Takei¹⁰ (1. JGC JAPAN, 2. KAJIMA, 3. IHI, 4. ATK, 5. HAZAMA ANDO, 6. OYO, 7. JX Metals R.E.&D., 8. Dia Nippon Engineering Consultants co.Ltd., 9. MAEDA CORPORATION, 10. ENAA)

Keywords:Geological disposal, Safety evaluation, Vitrified waste, Cooling period before reprocessing, Separating minor actinides

As the spent fuel cooling period before reprocessing becomes longer, radioactive inventory and heat generation rate change, which affects the engineered barrier temperature and safety (the guideline values are fully satisfied). We investigated methods such as separating minor actinide nuclides as a mitigation measure for these affects and confirmed their effectiveness.