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汚染水の現状とその評価法

Present status and evaluation methods of contaminated water

木野 千晶*; 唐澤 英年*; 内田 俊介*; 西岡 俊一郎; 逢坂 正彦  

Kino, Chiaki*; Karasawa, Hidetoshi*; Uchida, Shunsuke*; Nishioka, Shunichiro; Osaka, Masahiko

福島第一原子力発電所事故における事故後長期間の汚染水を介したFP再移行挙動の評価のため、SAMPSONコードをベースにして汚染水解析手法を確立し、事故後1年間の汚染水中のセシウム濃度の解析を行った。燃料デブリからのFP追加放出を考慮した場合の解析結果は汚染水内のセシウム濃度の実測値をよく再現できた。

To evaluate the remigration behavior of FP through the aqueous phase in FDNPS for a long term, an analysis methodology of contaminated water was developed based on SAMPSON code. The test analysis result for cesium concentration in the contaminated water in FDNPS unit 1 for 1 year, with the consideration of cesium release from the fuel debris to the aqueous phase had a good agreement with the actual measured cesium concentration.

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