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汚染水処理二次廃棄物保管容器の健全性に関する調査

The Survey for the integrity of containers for secondary wastes generated from contaminated water treatment

飯田 芳久; 中土井 康真; 山口 徹治

Iida, Yoshihisa; Nakadoi, Yasumasa; Yamaguchi, Tetsuji

東京電力福島第一原子力発電所において発生する汚染水処理二次廃棄物の長期的な保管のための技術的知見を蓄積することを目的として、東京電力から発表されている情報を汚染水処理二次廃棄物管理の観点でとりまとめた。そして、長期保管に際する保管容器の健全性に対する懸案事項として、塩化物イオン共存および放射線下でのステンレス鋼製容器の腐食、酸性条件および活性炭共存下でのステンレス鋼製容器の腐食、およびスラリーを収納した高性能容器(HIC)の放射線劣化を抽出した。

The information on the contaminated water treatment in Fukushima Daiichi Nuclear Power Station announced by Tokyo Electric Power Co., Inc. (TEPCO) were summarized in terms of the management of the secondary wastes, for the purpose of accumulating technical knowledge for long-term storage of the wastes. Concerns for the long-term soundness of waste storage containers were pointed out as follows, corrosion of stainless steel containers exposed to radiation in the presence of chloride ions, corrosion of stainless steel containers under acidic conditions or in the presence of activated carbon, and radiation degradation of the high-performance container (HIC) in which slurry was stored.

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