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2004 Fiscal Year Final Research Report Summary

Development pf fabrication technology for fusion blanket components with low activation vanadium alloys

Research Project

Project/Area Number 14380223
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Nuclear fusion studies
Research InstitutionNational Institute for Fusion Science

Principal Investigator

MUROGA Takeo  National Institute for Fusion Science, Fusion Engineering Research Center, Professor, 炉工学研究センター, 教授 (60174322)

Co-Investigator(Kenkyū-buntansha) NAGASAKA Takuya  Fusion Engineering Research Center, Associate Professor, 炉工学研究センター, 助教授 (40311203)
TANAKA Teruya  Fusion Engineering Research Center Research Associate, 炉工学研究センター, 助手 (30353444)
Project Period (FY) 2002 – 2004
Keywordsvanadium alloy / fusion blanket / fabrication technology / ceramics coating / laser welding
Research Abstract

Fabrication technology of vanadium alloys has been developed for application to liquid lithium blanket for fusion reactors. Special efforts were made on laser welding technology, tube fabrication technology and ceramics insulator coating technology. Microstructural characterization during the fabrication was carried out which enhanced mechanistic understanding on the processing.
Laser welding technology was developed by developing the impurity control procedure during the welding. With the decrease in the impurity pick-up during the welding, the weldment comparable mechanical properties to those of the matrix. With appropriate post weld thermal treatment, the degradation in the resistance to neutron irradiation of the weld joint was eliminated.
Ceramic insulator coating with Er203 was developed both with PVD and in-situ coating methods. The resulting coating showed high stability in liquid lithium for a long period as far as the coating has high crystallinity. The coatings showed satisfactory resistance for application to the insulator coating.
Fabrication of the thin wall tube for pressurized creep tube specimens were fabricated. By maintaining the precipitation orientation, less cracks were formed than those of the previous tubes. With the products, highly reliable thermal creep data are being obtained in vacuum and liquid thium environments.
By these technological advancement, feasibility of the blanket construction, including test blanket modules, was demonstrated.

  • Research Products

    (11 results)

All 2005 2004 2003 2002

All Journal Article (11 results)

  • [Journal Article] Behavior of Oxygen in Fusion Candidate Vanadium Alloys during Oxidation and Annealing2005

    • Author(s)
      姚 振宇
    • Journal Title

      Materials Science Forum 475-479

      Pages: 1445-1448

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Improvement of Vanadium Alloys by Precipitate Control for Structural Component of Fusion Reactors2005

    • Author(s)
      室賀健夫
    • Journal Title

      Materials Science Forum 475-479

      Pages: 1449-1454

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Behavior of Oxygen in Fusion Candidate Vanadium Alloys during Oxidation and Annealing2005

    • Author(s)
      Z.Yao
    • Journal Title

      Materials Science Forum 475-479

      Pages: 1445-1448

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Improvement of Vanadium Alloys by Precipitate Control for Structural Component of Fusion Reactors2005

    • Author(s)
      T.Muroga
    • Journal Title

      Materials Science Forum 475-479

      Pages: 1449-1454

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Impact properties of NIFS-HEAT-2 (V-4Cr-4Ti) after YAG laser welding and neutron irradiation at 563 K2004

    • Author(s)
      長坂琢也
    • Journal Title

      journal of Nuclear materials 329-333

      Pages: 1539-1543

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Impact properties of NIFS-HEAT-2 (V-4Cr-4Ti) after YAG laser welding and neutron irradiation at 563 K2004

    • Author(s)
      T.Nagasaka
    • Journal Title

      Journal of Nuclear Materials 329-333

      Pages: 1539-1543

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Development of tubing technique for high-purity low activation vanadium alloys2003

    • Author(s)
      長坂琢也
    • Journal Title

      Fusion Science and Technology 44

      Pages: 465-469

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Mechanical properties of laser weldment of V-4Cr-4Ti alloy2003

    • Author(s)
      許男鎭
    • Journal Title

      Fusion Science and Technology 44

      Pages: 470-474

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Development of tubing technique for high-purity low activation vanadium alloys2003

    • Author(s)
      T.Nagasaka
    • Journal Title

      Fusion Science and Technology 44

      Pages: 465-469

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Mechanical properties of laser weldment of V-4Cr-4Ti alloy2003

    • Author(s)
      N.Heo
    • Journal Title

      Fusion Science and Technology 44

      Pages: 470-474

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Tearing Mode in a Heliotron Plasma2002

    • Author(s)
      K.Ichiguchi
    • Journal Title

      Journal of Plasma and Fusion Research SERIES vol.5

      Pages: 491-494

    • Description
      「研究成果報告書概要(和文)」より

URL: 

Published: 2006-07-11  

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