Swelling of improved 16Cr-15Ni-2Mo-Mn-Ti-V-B steel under dose rates from 1 × 10−8 to 1.7 × 10−6 dpa/s

It was revealed that the average swelling rate of improved 16Cr-15Ni-2Mo-Mn-Ti-V-B steel at the maximum swelling temperature is within the range of 0.04-0.14%/dpa. Shifting of this temperature from 460 to 520 °C with increase of the maximum damaging dose from 60 to 80 dpa (1.3 ×  10−6 and 1.7 × 10−6 dpa/s, respectively), is observed. At doses below 10 dpa and temperatures below 400 °C the average swelling rate may reach 0.04%/dpa. At temperatures of about 600 °C and irradiation doses below 50 dpa the swelling rate does not exceed 0.01%/dpa during the whole period of observation.