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人工海水に浸漬した使用済被覆管の断面観察

Cross-sectional observation of spent fuel cladding immersed in artificial seawater

本岡 隆文; 鈴木 美穂; 冨田 健; 木村 康彦; 上野 文義  

Motooka, Takafumi; Suzuki, Miho; Tomita, Takeshi; Kimura, Yasuhiko; Ueno, Fumiyoshi

使用済燃料被覆管への海水成分の移行の有無を調査するため、80$$^{circ}$$Cの8倍希釈人工海水に300時間浸漬した使用済燃料被覆管の断面をEPMAで観察した。クラッド(鉄さび)層と酸化ジルコニウム層を有する使用済燃料被覆管は、クラッド層に海水成分(Mg, Cl)の付着はあったが、被覆管内部に海水成分は認められなかった。

To investigate the migration of seawater components to a spent fuel cladding tube, cross-sectional observation for spent fuel cladding tube immersed in diluted artificial seawater at 80 for 300 hours was conducted with EPMA. Spent fuel cladding tube having crud layer and zirconium oxide layer showed the adhesion of seawater components (Mg, Cl) on the cladding and no penetration of seawater components into the cladding.

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