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Fuel hydrogen retention of tungsten and the reduction by inert gas glow discharges

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Title: Fuel hydrogen retention of tungsten and the reduction by inert gas glow discharges
Authors: Hino, T. Browse this author →KAKEN DB
Yamauchi, Y. Browse this author
Kimura, Y. Browse this author
Nishimura, K. Browse this author
Ueda, Y. Browse this author
Keywords: Tungsten
Deuterium retention
Tritium retention
Glow discharge
Helium
Neon
Argon
Hydrogen isotope exchange
Wall baking
Issue Date: Aug-2012
Publisher: Elsevier B.V.
Journal Title: Fusion Engineering and Design
Volume: 87
Issue: 5-6
Start Page: 876
End Page: 879
Publisher DOI: 10.1016/j.fusengdes.2012.02.051
Abstract: Polycrystalline tungsten was exposed to deuterium glow discharge followed by He, Ne or Ar glow discharge. The amount of retained deuterium in the tungsten was measured using residual gas analysis. The amount of desorbed deuterium during the inert gas glow discharge was also measured. The amount of retained deuterium was 2-3 times larger compared with a case of stainless steel. The ratios of desorbed amount of deuterium by He, Ne and Ar glow discharges were 4.6, 3.1 and 2.9%, respectively. These values were one order of magnitude smaller compared with the case of stainless steel. The inert gas glow discharge is not suitable to reduce the fuel hydrogen retention for tungsten walls. However, the wall baking with a temperature higher than 700 K is suitable to reduce the fuel hydrogen retention. It is also shown that the use of deuterium glow discharge is effective to reduce the in-vessel tritium inventory in fusion reactors through the hydrogen isotope exchange.
Type: article (author version)
URI: http://hdl.handle.net/2115/50798
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 日野 友明

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