HYDROGEN ISOTOPE TRANSFER IN AUSTENITIC STEELS AND HIGH-NICKEL ALLOY DURING IN-CORE IRRADIATION

The transfer of protium and deuterium in austenitic chromium-nickel st eels and in a high-nickel alloy was studied in a specially designed fa cility. The transfer parameters of protium and deuterium were found to change greatly during in-core irradiation, and the effects of irradia tion increased as the temperature decreased. Thus, at temperature T<67 3K, the relative increase in the permeability of hydrogen isotopes und er irradiation can be orders of magnitude higher in these steels. Othe r radiation effects were also observed, in addition to the changes fro m the initial values in the effects of protium and deuterium isotopic transfer.