The average bubble size increases and the bubble density decreases with an increasing irradiation temperature from 200 C to 350 C. Both the average size and density of the bubbles increase with an increasing irradiation dose from 2 dpa to 8 dpa. Bubbles with smaller size and lower density were observed in the SMATed samples but not in the un-SMATed samples irradiated in the same conditions, which indicate that GBs play an important role during irradiation, and sink strength increases as grain size decreases. | Radiation damage in helium ioneirradiated reduced activation ferritic/martensitic steel
