Tritium permeation induced by water corrosion of metals

• Project/Area Number: 26289364
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Nuclear engineering
• Research Institution: Kindai University (2016-2017); Kyushu University (2014-2015)
• Principal Investigator: OTSUKA Teppei 近畿大学, 理工学部, 准教授 (80315118)
• Project Period (FY): 2014-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥10,660,000 (Direct Cost: ¥8,200,000、Indirect Cost: ¥2,460,000); Fiscal Year 2017: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000); Fiscal Year 2014: ¥7,280,000 (Direct Cost: ¥5,600,000、Indirect Cost: ¥1,680,000)
• Keywords: トリチウム / 透過 / 腐食 / 純鉄 / 圧縮応力 / 金属物性 / 廃棄物処理 / 酸化物分散強化型ステンレス鋼 / 還元 / トリチウム工学 / 環境材料 / 環境技術 / 物質輸送 / 水素 / 鉄 / ニッケル / ショットピーニング / 拡散

Outline of Final Research Achievements

Models of transport of tritium through metal/water or water/metal interfaces are proposed as follows, (1) Tritium entry in metals by water corrosion, (2) Tritium release into water by oxidation, (3) effects of residual stress on tritium permeation behaviors (1) and (2).
A part of tritium produced by water corrosion of metals dissolves and enters in interstitials of metals. The rate of permeation of tritium is determined by fugacity of tritium dissolution and diffusivity of hydrogen in metals. Atomic tritium permeated through the metals is released into water by oxidation of atomic tritium to water form. The effects of stress or strain on tritium permeation is very small.

Research Products

• [Journal Article] Effects of shot-peening on permeation and retention behaviors of hydrogen in alpha iron (2018)
  • Author(s): Otsuka Teppei, Goto Kengo, Yamamoto Akihiro, Hashizume Kenichi
  • Journal Title: Fusion Engineering and Design Volume: - Pages: 509-512
  • DOI: 10.1016/j.fusengdes.2018.03.007
  • Peer Reviewed
• [Journal Article] Chemical forms of desorbed hydrogen by permeation through pure iron and oxide dispersion strengthened steels (2018)
  • Author(s): Teppei Otsuka, Kengo Goto, Kan Sakamoto, Kenichi Hashizume
  • Journal Title: Fusion Engineering and Design Volume: -
  • Peer Reviewed
• [Journal Article] Behavior of Tritium Permeation Induced by Water Corrosion of Alpha Iron Around Room Temperature (2015)
  • Author(s): Teppei Otsuka, Kenichi Hashizume
  • Journal Title: Fusion science and technology Volume: 67 Issue: 3 Pages: 511-514
  • DOI: 10.13182/fst14-t67
  • Peer Reviewed
• [Presentation] Development of tritium permeation barrier based on new concepts (2018)
  • Author(s): Teppei Otsuka
  • Organizer: 13th Japan-Korea Workshop on Fusion Material Technology Toward Next Fusion Devices
• [Presentation] Effects of shot-peening on tritium retention and permeation behaviors of pure iron (2017)
  • Author(s): Teppei Otsuka, Kengo Goto, Akihiro Yamamoto, Kenichi Hashizume
  • Organizer: 13th International Symposium on Fusion Nuclear Technology
  • Int'l Joint Research
• [Presentation] Chemical forms of desorbed hydrogen by permeation through pure iron and oxide dispersion strengthened steels (2017)
  • Author(s): Teppei Otsuka, Kengo Goto, Kan Sakamoto, Kenichi Hashizume
  • Organizer: 2nd Asia Pacific Symposium on Tritium Science and Technology
  • Int'l Joint Research
• [Presentation] Tritium permeability in FeCrAl-ODS steels without oxide scales (2016)
  • Author(s): K. Sakamoto, M. Hirai, K. Goto, T. Otsuka, K. Hashizume, F. Yamashita
  • Organizer: Nuclear Materials Conference 2016
  • Place of Presentation: Montpellier, France
  • Year and Date: 2016-11-07
  • Int'l Joint Research
• [Presentation] 純鉄の水素透過挙動に及ぼすショットピーニングの影響 (2016)
  • Author(s): 後藤健吾，大塚哲平，橋爪健一
  • Organizer: 日本鉄鋼協会
  • Place of Presentation: 大阪大学（豊中市）
  • Year and Date: 2016-09-21
• [Presentation] Hydrogen permeation behavior through shot-peened surface of alpha iron examined by tritium tracer techniques (2016)
  • Author(s): Otsuka Teppei
  • Organizer: 15th International Symposium on Metal-Hydrogen Systems
  • Place of Presentation: Interlaken, Switzerland
  • Year and Date: 2016-08-07
  • Int'l Joint Research
• [Presentation] 鉄鋼から透過した水素の化学形に関する研究 (2016)
  • Author(s): 後藤健吾、大塚哲平、橋爪健一
  • Organizer: 核融合エネルギー講演会
  • Place of Presentation: 九州大学（福岡市）
  • Year and Date: 2016-07-14
• [Presentation] Release behaviors of tritium in copper alloys to pure water around room temperature (2015)
  • Author(s): Teppei Otsuka and Kenichi Hashizume
  • Organizer: 1st Asia-Pacific Symposium on Tritium science
  • Place of Presentation: Miangyang, China
  • Year and Date: 2015-11-02
  • Int'l Joint Research
• [Presentation] 水腐食により純鉄に取り込まれた水素の観察へのトリチウムトレーサー技術の応用 (2015)
  • Author(s): 大塚 哲平
  • Organizer: 日本鉄鋼協会
  • Place of Presentation: 九州大学
  • Year and Date: 2015-09-16
• [Presentation] Retention and release behaviors of hydrogen in fusion reactor materials studied by means of tritium tracer techniques (2014)
  • Author(s): Teppei Otsuka, Tetsuo Tanabe
  • Organizer: Decennial IAEA Technical Meeting on Atomic,Molecular and Plasma-Material InteractionData for Fusion Science and Technology
  • Place of Presentation: Daejon, South Korea
  • Year and Date: 2014-12-15 – 2014-12-19
  • Invited
• [Presentation] Behaviors of tritium permeation induced by water-corrosion of steels, 12th International Workshop on Hydrogen in Nuclear Fusion Materials (2014)
  • Author(s): Teppei Otsuka
  • Organizer: 12th International Workshop on Hydrogen in Nuclear Fusion Materials
  • Place of Presentation: University of Toyama, Japan
  • Year and Date: 2014-06-02 – 2014-06-04