Simplified atomistic based kinetic model for swelling prediction

A Yanilkin, JOURNAL OF NUCLEAR MATERIALS, 586, 154640 (2023).

DOI: 10.1016/j.jnucmat.2023.154640

In this paper, simplified kinetics with several self-consistent models is proposed for swelling prediction. It is based on the rate theory and atomistic simulation, while focusing on the description of experimentally observed bubbles and voids evolution and swelling. In this way, several models are proposed. They include the selfconsistent accounting for the vacancy diffusion coefficient and the formation energy, models of heterogeneous bubbles nucleation, interstitial cluster sink and spatial inhomogeneity of sinks. Parametrized model shows the reasonable agreement with experimental data on AISI CW 316 steel, irradiated at various temperatures and doses in fast reactor EBR-II. The influence of interstitial cluster sink and dislocation annealing on temperature dependence of swelling is discussed.

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