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Gas generation and migration analysis for TRU Waste Disposal in Japan

TRU廃棄物処分システムにおけるガス発生移動解析

安藤 賢一*; 三原 守弘  ; 納多 勝*; 山本 幹彦*

Ando, Kenichi*; Mihara, Morihiro; Noda, Masaru*; Yamamoto, Mikihiko*

TRU廃棄物処分システムにおいて、金属の腐食,微生物による有機物の分解及び放射線によるガス発生を考慮して、TRU廃棄物の処分システムにおけるガス移動の評価を実施した、ガスによる処分システムの圧力上昇や、処分施設内の放射性物質に汚染された地下水の押出しに気液二相流モデルを用いて評価を行った。加えて、放射性ガスの移行や処分システムの再冠水挙動についても評価を実施した。

This study focus on gas generation associated with metal corrosion, bio-degradation of organic materials and radiolysis and gas migration through the engineered barrier system (EBS) into the surrounding host rock. Two Phase Flow analysis was performed and evaluated in terms of the development of gas pressure and discharged water from the EBS. In addition radioactive gas transport from the repository and across the reference land surface, and resaturation behavior were examined.

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