Plasma and Fusion Research
Online ISSN : 1880-6821
ISSN-L : 1880-6821
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Bi-Directional Hydrogen Permeation through F82H under DEMO-Relevant Conditions
Haishan ZHOUYoshi HIROOKANaoko ASHIKAWATakeo MUROGAAkio SAGARA
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2013 Volume 8 Pages 2402065

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Abstract

Using a laboratory-scale plasma device, plasma-driven and gas-driven permeation of hydrogen through a ferritic steel alloy: F82H has been investigated under some of the DEMO-relevant conditions. The steady state plasma-driven permeation flux has been found to be strongly affected by the variation in upstream surface morphology resulted from plasma bombardment. The activation energy of permeability for gas-driven permeation has been estimated to be ∼0.5 eV, which is close to the result of plasma-driven permeation. Gas-driven permeation can occur in the opposite direction of plasma-driven permeation, which then results in an increase in first wall recycling.

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© 2013 by The Japan Society of Plasma Science and Nuclear Fusion Research
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