Several variants are possible in the suite of programs forming multiscale predictive tools to estimate the yield strength increase caused by irradiation in RPV steels.For instance at the the atomic scale, both the Metroplois and the Lattice Kinetic Monte Carlo methods (MMC and LKMC respectively) allow predicting copper precipitation under irradiation conditions. Since these methods are based on different physical models, the present contribution discusses their consistency on the basis of a realistic case study. A cascade debris in iron containing 0.2 percent of copper was modelled by molecular dynamics with the DYMOKA code, which is part of the REVE suite. We use this debris as input for both the MMC and the LKMC simulations.Thermal motion and lattice relaxation can be avoided in the MMC, making the model closer to the LKMC ( LMMC method). This predicitons and the complementarity of the three methods for modelling the same phenomenon are then discussed.
|Number of pages
|Nuclear Instruments and Methods B
|Published - Apr 2003