Abstract
The helium/dpa (He/dpa) ratio in stainless steel under fusion conditions will be about 30 times greater than in EBR-II and about 7 times less than in HFIR. To permit the meaningful use of fission reactor swelling data, the effects of various He/dpa ratios must be understood. A rate theory model with several novel features and which explicitly considers some potential He/dpa ratio effects has been calibrated using data from both EBR-II and HFIR. The calibrated model has been used to predict swelling under fusion conditions. The results indicate that simple extrapolations of swelling data from either EBR-II or HFIR may not be valid.
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