Helium irradiation effect on hydrogen isotope permeation in austenitic stainless steel

• Published in: Japanese Journal of Applied Physics Vol. 25; no. 7; pp. 1106 - 1110
• Main Authors: TERASAWA, M, FUKUSHIMA, K, NAKAHIGASHI, S, EBISAWA, K, IIMURA, M
• Format: Journal Article
• Language: English
• Published: Tokyo Japanese journal of applied physics 01.07.1986
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Ion radiation effects; Materials science; Metals, semimetals and alloys; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Other interactions of matter with particles and radiation; Physical radiation effects, radiation damage; Physics; Specific materials; Structure of solids and liquids; crystallography; Deuterium; Austenitic stainless steel; Hydrogen; Ions; Experimental study; Nuclear reactor; Helium ion; Gas permeability; Isotope effect; Ion irradiation; Helium Atomic ions; Utilisation; Irradiation; Application
• ISSN: 0021-4922; 1347-4065
• DOI: 10.1143/jjap.25.1106

Pre- and simultaneous-irradiation effects on the D permeability of Type-316 stainless steel were investigated using a dual ion-beam irradiation facility. In the He pre-irradiation experiment, the relative D permeation rate decreased to about 0.3 under backward He ++ irradiation and increased to about 3 under forward He + irradiation for a He fluence higher than 2×10 17 He/cm 2 . By a numerical analysis, the change in the permeation rate was found to be mainly attributable to a diffusion-constant reduction in the He-implanted region. In a simultaneous D + and backward He ++ irradiation experiment, a rapid D permeation rate change occured, probably due to an instantaneously induced D diffusion barrier in addition to the gradual change of the premeation rate similar to that shown in the He backward pre-irradiation experiment.