IUVSTA 15th International Vacuum Congress (IVC-15), AVS 48th International Symposium (AVS-48), 11th International Conference on Solid Surfaces (ICSS-11)
    Vacuum Science & Technology Wednesday Sessions
       Session VST-WeM

Paper VST-WeM6
Hydrogen Diffusion under Reactor Irradiation

Wednesday, October 31, 2001, 10:00 am, Room 125

Session: Gas Sorption Phenomena I
Presenter: G.W. Schwarzinger, Vienna University, Austria
Authors: G.W. Schwarzinger, Vienna University, Austria
M.J. Higatsberger, Vienna University, Austria
R.W. Dobrozemsky, Vienna University of Technology, Austria
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Diffusion of Hydrogen is of crucial and still growing importance in a variety of technical applications. In this work, the special case of hydrogen diffusion under fission reactor irradiation in stainless steel tubes of AISI types 304N and 316L is presented. Whilst the basic data had been presented in earlier publications,@footnote 1,2@ the contents of this work provide new insights resulting from a detailed sophisticated analysis of the complete data set. This revealed a previously hidden influence of the reactor irradiation on the pressure dependence of hydrogen diffusion through the samples. The pressure dependence of hydrogen permeation decreased under reactor irradiation with a half-life of approx. 150 hours. With the reactor shut off, this effect was reversed with approx. the same time constant. Based on the conditions of the experiments, a selection of interpretations for possible underlying mechanisms for the given effects are discussed. @FootnoteText@ @footnote 1@ R. Dobrozemsky, G.W.Schwarzinger and C. Stratowa, Proc. of IVC8, 15 (1980) @footnote 2@ G.W. Schwarzinger and R. Dobrozemsky, J Nucl Mater 122 & 123, 1560 (1984) .