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Operation and maintenance experience of sodium leak detector in Monju

もんじゅにおけるナトリウム漏えい検出設備の運用及び保守経験

武藤 啓太郎; 浜野 大輔; 川端 守; 莨谷 康広; 箭内 千里

Muto, Keitaro; Hamano, Daisuke; Kawabata, Mamoru; Tabakoya, Yasuhiro; Yanai, Chisato

ガスサンプリング型ナトリウム微少漏えい検出器SID(Sodium Ionization Detector)は高速増殖原型炉「もんじゅ」におけるナトリウム漏洩を監視するために設置され、40%の原子炉出力試験を経て、2018年まで運用した。SIDは運用期間中にいくつかの指示値の変動事象を経験し、必要な対策が実施された。その結果、SIDシステムは、運用が終了するまで重大な誤動作なしにその機能を維持することができた。

Gas sampling type sodium small leak detector, SID, Sodium Ionization Detector, a gas sampling detector installed to monitor small sodium leak in the Prototype Fast Breeder Reactor Monju, had been operated since it's system start up test through to the 40% reactors output test, It's use was terminated in April, 2018. SID showed some indication variations during its operation period, and necessary measures were implemented. As a result, the SID system maintained its functions without any critical malfunction until the end of its operation.

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