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高速増殖原型炉もんじゅの設備健全性確認,2; 2次主冷却系ナトリウム漏えい対策確認試験

Equipment integrity confirmation of fast breeder prototype reactor MONJU, 2; Modification function tests of secondary sodium cooling system

鬼沢 卓広; 伊藤 健司 ; 尾崎 俊之

Onizawa, Takahiro; Ito, Kenji; Osaki, Toshiyuki

もんじゅ2次系では、ナトリウム漏えい時、漏えいを早期に終息させ、ナトリウム燃焼等による設備への影響をより一層抑制するための改造工事を行った。これらの改造として、ドレン配管の増設,ドレン配管の大口径化,緊急ドレンの一括操作化等を行った。2次主冷却系ナトリウム漏えい対策確認試験では、これらの機能・性能等を確認した。

In the secondary sodium cooling system equipment of Monju, the leakage was ended at the early stage when sodium leaked, and the remodeling construction to control the influence on equipment by the sodium combustion etc. further more were done. These are the addition of drain piping, the enlargement of drain piping and the batch operation of emergency drain valve etc.. In the modification function tests of secondary sodium cooling system, these function and performance, etc. were confirmed.

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