Abstract
It is well known that nuclear pressure vessel steel shows embrittlement under thermal aging and strong neutron irradiation. To examine this attention has been paid to copper-rich precipitates how they work to embrittle reactor pressure vessel steels. Our final goal is to evaluate such embrittlement from microscopic viewpoint based on atomistic simulation. In this study, we simulate nanoscale copper precipitation process based on the vacancy jump model using Multi Vacancy Lattice Monte Carlo (MVLMC) method, where an activation energy is calculated from the first neighboring interaction model.
