AN INTERACTION OF HYDROGEN ISOTOPES WITH AUSTENITIC Cr - Ni STEELS WITHOUT AND DURING REACTOR IRRADIATION Hydrogen Recycle At Plasma Facing Materials

摘要

Experimental data on an interaction of hydrogen isotopes (protium and deuterium) with austenitic Cr - Ni steels are reported. The data were obtained with the special equipment designed and installed at the research reactor IVV -2M in the conditions without and during irradiation by fast neutrons of a flux density up to 1.8 X 10 ~(18)n/m~2s ( E > 0.lMeV), fluence up to 10~(25)n/m~2 and a gamma - absorbed dose rate< 3.6 W/g, a hydrogen pressure being up to 2.4 MPa. Steel samples were tested out - of - pile in the protium medium under static and dynamic modes, reaching the pressure of 50 MPa and rupture of the samples. The experimental data showed that the radiation effects increased with a decreasing temperature during irradiation. Thus, at T < 673 K a relative increase of both hydrogen permeability and solubility values can reach several orders of magnitude. Besides, there were observed the substantial deviations of isotopic effects, changing of physico -mechanical properties and other radiation effects.