Hydrogen isotope permeability through austenitic Cr [sbnd]Ni steels under neutron irradiation

Abstract

Experimental data on permeability and diffusion of protium and deuterium through austenitic Cr Ni steels 18Cr 10Ni Ti, 16Cr 11Ni 3Mo Ti and 25Cr 16Ni 6Mn N V are reported. The data were obtained with special equipment designed and installed at the research reactor IVV-2M. It was shown that parameters of hydrogen isotope transfer in Cr Ni steels increased substantially during irradiation by fast neutrons of the flux density f < 1.8 × 10 18 n/m 2s ( E ≫ 0.1 MeV). Radiation effects increase with a temperature decrease. Thus, at T < 673 K a relative increase of permeability can reach several orders with respect to its value. Deviations isotopic effects from their initial values and other radiation defects were observed.