Reaction kinetics analysis of damage evolution in accelerator driven system beam windows

Reaction kinetic analysis was used to estimate the damage evolution in window materials of 800 MWth accelerator driven system (ADS). Parameters were fitted to F82H of the STIP-II experiment at 673 K and EC316LN of the STIP-I experiment at 626 K. In F82H, the concentration of bubbles was almost constant and the bubble size increased, while the concentration of interstitial type dislocation loops increased and their size was constant between 2.1 × 10−3 and 210 dpa. EC316LN showed almost the same behavior. Swelling increased almost linearly with irradiation dose above 0.21 dpa between 673 K and 773 K.