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Replacement of the criticality accident alarm system in the Tokai Reprocessing Plant

東海再処理施設における臨界警報装置の更新

眞田 幸尚  ; 石井 雅人*; 長谷川 市郎; 金澤 信之; 近澤 達哉*; 百瀬 琢麿 

Sanada, Yukihisa; Ishii, Masato*; Hasegawa, Ichiro; Kanazawa, Nobuyuki; Chikazawa, Tatsuya*; Momose, Takumaro

東海再処理施設には、臨界管理の一環として、万が一の臨界事故の際に作業者の被ばくを防ぐための臨界警報装置を設置している。本論文では、高経年化対策として行った臨界警報装置の更新について述べる。

A criticality accident alarm system (CAAS) was installed in the 1980s as part of criticality safety management at the Tokai Reprocessing Plant (TRP) to reduce the chance of workers being exposed to radiation in the rare case of a criticality accident. From a compliance point of view processing at TRP cannot take place without the criticality monitoring provided by the CAAS. This paper gives an overview of the process of the CAAS being replaced as part of aging management.

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