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Fig. 2


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Number density of grain face bubbles versus the average projected area of the bubbles, observed in UO2 fuel with pellet average burnups between 9 and 33 MWd(kgU)−1 by White [62], Walker et al. [59] and Kashibe and Une [61]. The solid line is a plot of equation (12) over its range of application in the model. The dashed line represents the saturated grain face condition ϕ2 = nb Āp = 0.48.

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