「もんじゅ」点検期間長期化の要因分析及び次世代高速炉の保全合理化案の提案,2; 低温停止期間における「もんじゅ」の保全計画分析

Proposal of maintenance rationalization for next-generation fast reactors based on the analysis of the prolonged maintenance of the prototype fast-breeder reactor in Japan, "Monju", 2; Analysis of maintenance plan of "Monju" in reactor cold shutdown

豊田 晃大 ; 橋立 竜太 ; 高橋 慧多; 矢田 浩基 ; 高屋 茂  

Toyota, Kodai; Hashidate, Ryuta; Takahashi, Keita; Yada, Hiroki; Takaya, Shigeru

It is necessary to implement reasonable maintenance based on characteristics of a nuclear power plant to achieve both high safety and high economic efficiency of the power plant. The prototype fast breeder reactor "Monju" spent most of the year on maintenance. It is important to identify causes of the prolonged maintenance of "Monju" and consider countermeasures for subsequent fast reactors. In this study, we investigate causes of the prolonged maintenance by analyzing the Monju's maintenance plan. Further, we make proposals for optimizing the maintenance of next-generation fast reactors to address the identified issues.