Annealing of radiation defects in alloy Fe-2%Cr and reactor vessel steel after electron irradiation at 80 K

The effect of additions and precipitations of the other phase after the neutron irradiation on the point defects capture in the low-chromium reaction vessel steel of the 25Kh3NM-type and in the Fe2%Cr model alloy is studied. The steel samples in three states: the neutron-irradiated, neutron-irradiated and annealed at 873 K and initial ones annealed at 873 K were irradiated by electrons with the energy of 5 MeV at the temperature of 80 K and thereafter isochronously annealed at the temperature up to 900 K. The behavior of the additions and defects was judged by the change in the residual electric resistance by the isochronous annealing. It is established, that the additions in the reactor steel interact with internodal atoms and vacancies. The solid solution of the neutron-irradiated steel contains significantly less additions as compared to the initial material