Abstract
Kashiwazaki-Kariwa nuclear power stations in Niigata prefecture were taken the loading over design stress level by Chuetsu-oki earthquake in 2007.Then,the evaluation of the soundness was required immediately in their plants. In this study, the repeated two-step loading tests in low cycle fatigue regime were conducted using the loading with the high plastic strain simulated the large-scale earthquake and the plastic strain with start up and shut down about structural materials for the nuclear power generation. The result of fatigue tests indicated the effectiveness of the evaluation based on the linear cumulative damage rule.
