There is current interest in the LWR industry on the synergistic effects of displacement damage, helium and hydrogen on void swelling, hardening and IASCC. Substituting deuterium for protium offers advantages in studies of these synergisms. The influence of preimplanted helium and self-ion induced damage on deuterium trapping in 18Cr10NiTi stainless steel was studied using thermal desorption spectrometry, the nuclear reactions 3He(D,p)4He and D(3He,p)4He, and transmission electron microcopy. Reemission, retention and evolution of depth distribution profiles of deuterium in 18Cr10NiTi SS were studied for 10 keV D2+ and 10 keV He+ implantation at room temperature followed by annealing at 300 to 1500K. The amounts of trapped and released deuterium and helium atoms were measured as a function of implantation dose at various temperatures. It was found that retention of hydrogen and deuterium is strongly enhanced by the presence of large amounts of helium and also strongly enhanced by damage introduced by 2 MeV Cr+3 ions. These results are consistent with recent observations of hydrogen storage in stainless steels after irradiation in LWRs.
Revised: July 22, 2010 |
Published: September 15, 2006
Citation
Tolstolutskaya G.D., V.V. Ruzhitskij, I.E. Kopanets,, S.A. Karpov, V.V. Bryk, V.N. Voyevodin, and F.A. Garner. 2006.ENHANCEMENT OF DEUTERIUM RETENTION IN HELIUM or Cr+3 ION IMPLANTED 18Cr10NiTi STAINESS STEEL. In Proceedings of the 12th International Conference on Environmental Degradation of Materials in Nuclear Power System - Water Reactors, edited by T.R. Allen, P.J. King, and L. Nelson, 411-418. Warrendale, Pennsylvania:TMS (The Minerals, Metals & Materials Society). PNWD-SA-7083.