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Tritium behavior at formation of re-deposition layer from plasma facing material

Research Project

Project/Area Number 15360493
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Nuclear fusion studies
Research InstitutionKYUSHU UNIVERSITY

Principal Investigator

NISHIKAWA Masabumi  Kyushu University, Graduate School of Engineering Science, Professor, 大学院・総合理工学研究院, 教授 (90026229)

Project Period (FY) 2003 – 2005
Project Status Completed (Fiscal Year 2005)
Budget Amount *help
¥15,300,000 (Direct Cost: ¥15,300,000)
Fiscal Year 2005: ¥2,700,000 (Direct Cost: ¥2,700,000)
Fiscal Year 2004: ¥3,800,000 (Direct Cost: ¥3,800,000)
Fiscal Year 2003: ¥8,800,000 (Direct Cost: ¥8,800,000)
Keywordsplasma facing material / re-deposition layer / tritium uptake / RF plasma / graphite / tungsten / co-deposition / dust formation / RF重水素プラズマ / 等方性グラファイト
Research Abstract

In order to understand the tritium behavior at formation of re-deposition layer of plasma facing materials in a fusion reactor, experimental research has been performed using RF hydrogen plasma reactors in this study and new observations are obtained.
(1)The re-deposition layer of graphite or tungsten has the porous construction and it contains rather large amount of hydrogen. The H/C ratio observed in this study is 0.1-0.3, and that of H/W is about 0.1. It is known that solubility of hydrogen in tungsten is negligibly small. Accordingly, observation in this study suggests that dusts formed in fusion reactor may contain much more tritium than expected at present.
(2)The amount of hydrogen trapped in the co-deposition layer of graphite and tungsten is observed. The release behavior from co-deposition layer is different from the behavior of the re-deposition layer of single component.
(3)The deuterium plasma gives several times larger re-position layer than the hydrogen plasma. This suggests that the DT plasma may give thicker re-deposition layer than the hydrogen plasma.
(4).The empirical equation for the forming rate of re-deposition layer is made.

Report

(4 results)
  • 2005 Annual Research Report   Final Research Report Summary
  • 2004 Annual Research Report
  • 2003 Annual Research Report
  • Research Products

    (17 results)

All 2006 2005 2004 Other

All Journal Article (15 results) Book (1 results) Publications (1 results)

  • [Journal Article] Release behavior of hydrogen isotopes 【rom】T-60U graphite tiles2005

    • Author(s)
      K.Katayama, T.Takeishi, Y.Manabe, H.Nagase, M.Nishikawa, N.Miya
    • Journal Title

      Fusion Science and Technology 48.1

      Pages: 561-564

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Hydrogen retention in a tungsten re-deposition layer by hydrogen RF plasma2005

    • Author(s)
      T.Kawasaki, Y.Manabe, K.Katayama, T.Takeishi, M.Nishikawa
    • Journal Title

      Fusion Science and Technology 48.1

      Pages: 581-584

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Recovery of retained tritium from graphite tiles of JT-60U2005

    • Author(s)
      T.Takeishi, K.Katayama, M.Nishikawa, N.Miya, K.Masaki
    • Journal Title

      Fusion Science and Technology 48.1

      Pages: 565-568

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Tritium release behavior from the graphite tiles at the dome unit of the W-shaped diverter region in JT-60U2005

    • Author(s)
      K.Katayama, T.Takeishi, Y.Manabe, H.Nagase, M.Nishikawa, N.Miya
    • Journal Title

      Journal of Nuclear Materials 340.1

      Pages: 83-92

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Release behavior of hydrogen isotopes from JT-60 U graphite tiles2005

    • Author(s)
      K.Katayama, T.Takeishi, Y.Manabe, H.Nagase, M.Nishikawa, N.Miya
    • Journal Title

      Fusion Science and Technology Vol.48(1)

      Pages: 561-564

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Hydrogen retention in a tungusten Re-deposition layer by hydrogen RF Plasma2005

    • Author(s)
      T.Kawasaki, Y.Manabe, K.Katayama, T.Takeishi, M.Nishikawa
    • Journal Title

      Fusion Science and Technology Vol.48(1)

      Pages: 581-584

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Recovery of retained tritium from graphite tiles of JP-60U2005

    • Author(s)
      T.Takeishi, K.Katayama, M.Nishikawa, N.Miya, K.Masaki
    • Journal Title

      Fusion Science and Technology Vol.48(1)

      Pages: 565-568

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Tritium release behavior from the Graphite tiles at the dome unit of the W-shaped divertor region in JT-60U2005

    • Author(s)
      K.Katayama, T.Takeishi, Y.Manabe, H.Nagase, M.Nishikawa, N.Miya
    • Journal Title

      Journal of Nuclear Materials Vol.340

      Pages: 83-92

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Release behavior of hydrogen isotopes from JT-60U graphite tiles2005

    • Author(s)
      K.Katayama, T.Takeishi, Y.Manabe, H.Nagase, M.Nishikawa, N.Miya
    • Journal Title

      Fusion Science and Technology 48(1)

      Pages: 561-564

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Hydrogen retention in a tungsten re-deposition layer by hydrogen RF plasma2005

    • Author(s)
      T.Kawasaki, Y.Manabe, K.Katayama, T.Takeishi, M.Nishikawa
    • Journal Title

      Fusion Science and Technology 48(1)

      Pages: 581-584

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Recovery of retained tritium from graphite tiles of JT-60U2005

    • Author(s)
      T.Takeishi, K.Katayama, M.Nishikawa, N.Miya, K.Masaki
    • Journal Title

      Fusion Science and Technology 48(1)

      Pages: 565-568

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Tritium release behavior from the graphite tiles at the dome unit of the W-shaped divertor region in JT-60U2005

    • Author(s)
      K.Katayama, T.Takeishi, Y.Manabe, H.Nagase, M.Nishikawa, N.Miya
    • Journal Title

      Journal of Nuclear Materials 340(1)

      Pages: 83-92

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Release behavior of hydrogen isotopes from JT-60U graphite tiles2005

    • Author(s)
      K.Katayama, T.Takeishi, H.Nagase, Y.Manabe, M.Nishikawa, N.Miya
    • Journal Title

      Fusion Science and Technology (in printing)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Hydrogen retention in a tungsten re-deposition layer by hydrogen RF plasma2005

    • Author(s)
      T.Kawasaki, Y.Manabe, K.Katayama, T.Takeishi, M.Nishikawa
    • Journal Title

      Fusion Science and Technology (in printing)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Formation of graphite re-deposition layer by hydrogen RF plasma2004

    • Author(s)
      K.Katayama, H.Nagase, Y.Manabe, Y.Kodama, T.Takeishi, M.Nishikawa
    • Journal Title

      Thin Solid Film Vol.457

      Pages: 151-157

    • Related Report
      2004 Annual Research Report
  • [Book] 水素-将来のエネルギーを目指して2006

    • Author(s)
      西川正史, 深田智, 渡辺幸信
    • Total Pages
      310
    • Publisher
      養賢堂
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Publications] K.Katayama, M.Nishikawa, T.Takeishi: "Isotope exchange reaction between tritiated water hydrogen on SiC"Journal of Nuclear Materials. 323. 138-143 (2003)

    • Related Report
      2003 Annual Research Report

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Published: 2003-04-01   Modified: 2016-04-21  

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