• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Development of durable solid-hydrogen pellet injector for fueling to fusion plasmas

Research Project

Project/Area Number 13358006
Research Category

Grant-in-Aid for Scientific Research (A)

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

Principal Investigator

YAMADA Hiroshi  National Institute for Fusion Science, Department of Large Helical Project, Professor, 大型ヘリカル研究部, 教授 (20200735)

Co-Investigator(Kenkyū-buntansha) MITO Toshiyuki  National Institute for Fusion Science, Department of Large Helical Project, Professor, 大型ヘリカル研究部, 教授 (10166069)
SAKAMOTO Ryuichi  National Institute for Fusion Science, Department of Large Helical Project, Research Associate, 助手 (10290917)
SUDO Shigeru  National Institute for Fusion Science, Department of Large Helical Project, Professor, 大型ヘリカル研究部, 教授 (50142302)
ODA Yasushi  Mitsubishi Heavy Industry, Inc. Kobe Shipyard & Machinery Works, Chief, 神戸造船所, 主任(研究職)
Project Period (FY) 2001 – 2004
Project Status Completed (Fiscal Year 2004)
Budget Amount *help
¥37,960,000 (Direct Cost: ¥29,200,000、Indirect Cost: ¥8,760,000)
Fiscal Year 2004: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2003: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2002: ¥13,520,000 (Direct Cost: ¥10,400,000、Indirect Cost: ¥3,120,000)
Fiscal Year 2001: ¥16,900,000 (Direct Cost: ¥13,000,000、Indirect Cost: ¥3,900,000)
KeywordsSolid hydrogen pellet / Extrusion molding / GM refrigerator / Continuous operation / Plasma and Nuclear Fusion / Fueling / High endurance / Cryogenic physics / 核融合 / 個体水素ペレット / 固体水素 / 定常運転
Research Abstract

Inevitability of solid hydrogen pellet injection for fueling to fusion plasmas has been widely recognized However, the technology of pellet injection has not been established sufficiently to fulfill the operational capability relevant to a reactor. This project aims at demonstration of a high-performance durable pellet injector relevant to high-temperature steady-state plasma operation. Major goals are (1) capability of 1-hour long operation and feasibility of unlimited operational duration, (2) repetition rate of more than 10 Hz and reliability of pellet launch of more than 95%, and (3) pellet velocity of more than 1.5 m/s. These 3 conditions should be fulfilled simultaneously in a proto-type injector. Essential elements in development are solidification and extrusion molding by means of a screw extruder, and cooling by a GM refrigerator which enables liquid helium free operation. Cryogenic temperature enough for solidification of hydrogen (10K) has been achieved in 4 hour from room t … More emperature. Then continuous solidification at the rate of 15mg/s for 1 hour has been successfully demonstrated. Extrusion molding to a rod has been available at the speed of 35mm/s. The temperature increase has been suppressed to less than 1K during this operation. The mechanism to form pellets from a rod and to launch the pellets has been combined with the screw extruder. The continuous pellet injection at 10 Hz for 1,000s, which means 10,000 pellets has been attempted and reliability of more than 99% for intact pellet launch has been confirmed. As for the pellet velocity, the maximum value has been limited to 600m/s. Performance of a fast valve for propellant gas has been surveyed with relation to differential gas pressure and flow rate of gas, which provides us prospect to improvement up to 1km/s. Further investigation to achieve the initial specification of the pellet velocity remains. In summary, two major goals in the initial objectives to demonstrate high-performance durable pellet injector relevant to high-temperature steady-state plasma operation have been achieved successfully and an issue to increase the pellet velocity has been decomposed to elemental subjects. Less

Report

(5 results)
  • 2004 Annual Research Report   Final Research Report Summary
  • 2003 Annual Research Report
  • 2002 Annual Research Report
  • 2001 Annual Research Report
  • Research Products

    (20 results)

All 2005 2004 2003 2002 Other

All Journal Article (15 results) Patent(Industrial Property Rights) (2 results) Publications (3 results)

  • [Journal Article] Pellet Injectors for Steady State Fueling2005

    • Author(s)
      I.Viniar, A.Geraud, H.Yamada, A.Lukin, R.Sakamoto et al.
    • Journal Title

      Fusion Engineering and Design (印刷中)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Refueling for Steady-State Plasma by Repetitive Pellet Injection in Large Helical Device2004

    • Author(s)
      H.Yamada, R.Sakamoto, I.Viniar, M.Goto, K.Kikuchi et al.
    • Journal Title

      Plasma Science and Technology 6

      Pages: 2275-2280

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Pellet Injectors Developed at the Pelin Laboratory for Steady-State Plasma Fueling2004

    • Author(s)
      I.Vinyar, A.Geraud, H.Yamada, R.Sakamoto, Y.Oda et al.
    • Journal Title

      Plasma Science and Technology 6

      Pages: 2286-2290

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Development of an Integrated Pellet Diagnostic System for Fueling Pellets2004

    • Author(s)
      Y.Kubota, M.Yoshikawa, Y.Nakashima, H.Yamada, R.Sakamoto et al.
    • Journal Title

      Review of Scientific Instruments 75

      Pages: 4228-4230

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Observation of Pellet Ablation Behaviour on the Large Helical Device2004

    • Author(s)
      R.Sakamoto, H.Yamada, K.Tanaka, T.Tokuzawa, S.Murakami et al.
    • Journal Title

      Nuclear Fusion 44

      Pages: 624-630

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Refueling for Steady-State Plasma by Repetitive Pellet Injection in Large Helical Device2004

    • Author(s)
      H.Yamada, R.Sakamoto, I.Viniar, M.Goto, K.Kikuchi et al.
    • Journal Title

      Plasma Science and Technology Vol.6

      Pages: 2275-2280

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Pellet Injectors Developed at the Pelin Laboratory for Steady-State Plasma Fueling2004

    • Author(s)
      I.Vinyar, A.Geraud, H.Yamada, R.Sakamoto, Y.Oda et al.
    • Journal Title

      Plasma Science and Technology Vol.6

      Pages: 2286-2290

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Development of an Integrated Pellet Diagnostic System for Fueling Pellets2004

    • Author(s)
      Y.Kubota, M.Yoshikawa, Y.Nakashima, H.Yamada, R.Sakamoto et al.
    • Journal Title

      Review of Scientific Instruments Vol.75

      Pages: 4228-4230

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Observation of Pellet Ablation Behaviour on the Large Helical Device2004

    • Author(s)
      R.Sakamoto, H.Yamada, K.Tanaka, T.Tokuzawa, S.Murakami et al.
    • Journal Title

      Nuclear Fusion Vol.44

      Pages: 624-630

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Refueling for Steady-State Plasma by Repetitive Pellet Injection in Large Helical Device2004

    • Author(s)
      H.Yamada, R.Sakamoto, I.Viniar, M.Goto, K.Kikuchi et al.
    • Journal Title

      Journal of Plasma Science and Technology Vol.6, No.3

      Pages: 2275-2280

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Pellet Injectors Developed at the Pelin Laboratory for Steady-state Plasma Fueling2004

    • Author(s)
      I.Vinar, A.Geraud, H.Yamada, R.Sakamoto, Y.Oda et al.
    • Journal Title

      Journal of Plasma Science and Technology Vol.6, No.3

      Pages: 2286-2290

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Observation of Pellet Ablation Behavior on the Large Helical Device2004

    • Author(s)
      R.Sakamoto, H.Yamada, K.Tanaka, T.Tokuzawa, S.Murakami, et al.
    • Journal Title

      Nuclear Fusion Vol.44, No.2

      Pages: 624-630

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Repetitive Fueling Pellet injection in Large Helical Device2003

    • Author(s)
      H.Yamada, R.Sakamoto, I.Viniar, Y.Oda, K.Kikuchi et al.
    • Journal Title

      Fusion Engineering and Design 69C

      Pages: 11-14

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Repetitive Fueling Pellet Injection in Large Helical Device2003

    • Author(s)
      H.Yamada, R.Sakamoto, I.Viniar, Y.Oda, K.Kikuchi et al.
    • Journal Title

      Fusion Engineering and Design Vol.69C

      Pages: 11-14

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Pellet Injectors for Steady State Fueling

    • Author(s)
      I.Viniar, A.Geraud, H.Yamada, A.Lukin, R.Sakamoto et al.
    • Journal Title

      Fusion Engineering and Design (in printing)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Patent(Industrial Property Rights)] 固体水素生成押出し装置及び方法2002

    • Inventor(s)
      山田弘司, 坂本隆一他
    • Industrial Property Rights Holder
      三菱重工業, 自然科学研究機構, ベリン
    • Industrial Property Number
      2002-125841
    • Filing Date
      2002-04-26
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Patent(Industrial Property Rights)] 定常固体水素生成押出し装置2002

    • Inventor(s)
      山田 弘司, 小田 泰嗣, イゴール・ピニアール他
    • Industrial Property Rights Holder
      大学共同利用機関法人自然科学研究機構, 他
    • Industrial Property Number
      2002-125841
    • Filing Date
      2002-04-26
    • Related Report
      2004 Annual Research Report
  • [Publications] H.Yamada, R.Sakamoto, I.Viniar, Y.Oda, et al.: "Repetitive Fueling Pellet Injection in Large Helical Device"Fusion Engineering and Design. 69c. 11-14 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] H.Yamada, R.Sakamoto, I.Viniar, M.Goto, K.Kikuchi, et al.: "Refueling for Steady-State Plasma by Repetitive Pellet Injection in Large Helical Device"Journal of Plasma Science and Technology. (予定). (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] H.Yamada, R.Sakamoto, I.Viniar, Y.Oda et al.: "Repetitive Fueling Pellet injection in Large Helical Device"Fusion Engineering and Design. 61(予定). (2003)

    • Related Report
      2002 Annual Research Report

URL: 

Published: 2001-04-01   Modified: 2017-11-14  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi