Abstract
Computer simulation techniques are used in this work to describe the precipitation kinetics of inert-gas bubbles in solids. By means of a predictor-corrector method, the temporal evolution of a size distribution of bubbles, growing under the coupled diffusive influx of gas atoms and lattice vacancies, is evaluated numerically. Applications are then made to analyses of the in-reactor growth of fission-gas bubbles in UO 2 as well as the growth, during post-irradiation heat treatment, of bubbles in UO 2 and gamma-uranium. It is found that the rate of vacancy flow to bubbles can play an important role in determining rates of precipitation.
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