[1C07-12] Migration & Sorption

[1C10] Evaluation of long-term safety of geological disposal of high-level waste generated during reprocessing spent MOX-LWR fuels

*Eriko Minari¹, Satsuki Kabasawa², Morihiro Mihara², Hitoshi Makino², Masahiko Nakase¹, Hidekazu Asano¹, Kenji Takeshita¹ (1. Tokyo Tech, 2. JAEA)

Keywords:MOX fuel in light water reactors, Radioactive waste management, Nuclear fuel cycle, Vitrification, Geological disposal

As a study on long-term safety of geological disposal of high-level waste (HLW) generated during reprocessing spent mixed oxide fuel in light water reactors (MOX-LWRs), two types of HLW are considered. One is HLW generated from MOX-LWR reprocessing and another is blended MOX-UO₂ HLW generated during reprocessing process whereby MOX fuels are diluted by UO₂ fuels. Radionuclide migration analyses for those two HLWs are conducted, and commonalities and differences between two HLWs in the viewpoint of long-term safety are discussed.