[2J01-04] Reactor Pressure Vessel Steel

[2J02] Advanced Management of Irradiation Embrittlement of Reactor Pressure Vessel Steel

(2)Modeling of Nucleation Process of Defect Clusters in RPV Steel during Irradiation

*Kazunori Morishita¹, Xiaoyong Ruan¹, Toshiki Nakasuji¹ (1. Kyoto University)

Keywords:Irradiation Embrittlement, Reactor Pressure Vessel, Multi-scale Modeling, Defect Cluster, Irradiation Correlation

Reactor pressure vessels are known to degraded by irradiation embrittblement during the plant operation, which is attributed by the formation of defect clusters such as copper-rich precipitates in RPV steels during irradiation. In the present study, multiscale modeling is performed to investigate the formation process of the clusters and the formation conditions are clarified. A possibility of developing a new irradiation embrittblement model is discussed. This is one of the series presentations titled by "Advanced Management of Irradiation Embrittlement of Reactor Pressure Vessel Steel".