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Report No.

Determination of ISI requirements on the basis of system based code concept

Takaya, Shigeru ; Kamishima, Yoshio*; Machida, Hideo*; Watanabe, Daigo*; Asayama, Tai 

In our previous study, a new process for determination of in-service inspection (ISI) requirements was proposed on the basis of the System Based Code concept. The proposed process consists of two complementary evaluations, one focusing on structural integrity and the other on plant safety. In this study, ISI requirements for a reactor guard vessel and a core support structure of the prototype sodium-cooled fast breeder reactor in Japan, Monju, were investigated according to the proposed process. The proposed process is expected to contribute to realize effective and rational ISI by properly taking into account plant-specific features.



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