Swelling and Radiation Creep of Ferrite-Martensite Steel Irradiated in the Bn-350 Reactor in a Wide Range of Temperature and Damaging Dose

The results of investigations of swelling and in-reactor creep of the ferrite-martensite class steels EP-450, EP-823, and EI-852 irradiated in a BN-350 reactor at 305–700°C to damaging dose in the range 20–89 dpa are presented. The characteristics of radiation creep of three of the ferrite-martensite steels are close despite the differences of the chemical composition and heat-treatment. The relation B = 4.864·10–2 + 1.45·10–3T describes the average modulus of radiation creep of the experimental steel in the interval 305–550°C.