论文信息 - Migration of gas bubbles in irradiated uranium dioxide

Migration of gas bubbles in irradiated uranium dioxide

Migration of fission gas bubbles in irradiated UO2 was studied, using electron microscopy, under isothermal annealing conditions at 1400, 1450 and 1500° C. Bubbles with radii greater than 37 A had a dependence of bubble migration distance on bubble radius which was characteristic of a migration mechanism controlled by volume diffusion. Migration rates were very much smaller than would be predicted from a surface-diffusion-controlled mechanism. The activation energy for bubble migration was found to be 130 000 cal/mole. Smaller bubbles migrated at a slower rate than predicted by a volume-diffusion-controlled mechanism.

M. E. Gulden | Mary Ellen Gulden

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