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Research on the reuse of fusion reactor divertors and reduction of radioactive waste by non-destructive high-temperature and high-pressure regeneration

Research Project

Project/Area Number 19K21869
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 14:Plasma science and related fields
Research InstitutionNational Institute for Fusion Science

Principal Investigator

Muroga Takeo  核融合科学研究所, ヘリカル研究部, 教授 (60174322)

Co-Investigator(Kenkyū-buntansha) 浜地 志憲  核融合科学研究所, ヘリカル研究部, 助教 (60761070)
能登 裕之  核融合科学研究所, ヘリカル研究部, 助教 (50733739)
Project Period (FY) 2019-06-28 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2021: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2020: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywordsプラズマ対向機器 / 高熱負荷試験 / 高温高圧再生 / 放射性廃棄物低減 / 高温静水圧プレス / 再生利用 / ダイバータ
Outline of Research at the Start

本研究は、核融合炉における放射性廃棄物の排出を大幅に低減する目的で、最も頻繁に交換が必要な「ダイバータ」という受熱機器の、機能再生、再利用の見通しを明らかにすることを目的とする。繰り返し熱負荷による疲労損傷により熱除去機能の低下したダイバータ試験体を、高温、超高圧雰囲気に保持(高温高圧処理)することにより、疲労亀裂を修復し、熱除去機能を再生させる可能性を明らかにし、その条件および再生機能の持続性を実証試験及び部材の材料学的な分析・評価により求める。

Outline of Final Research Achievements

The purpose is, in order to reduce radioactive waste in fusion reactors, to clarify the possibility of regeneration and reuse of a component called "divertor", which requires the most frequent replacement due to deterioration by repeated heat load.
In this research, we aim to repair cracks and restore the performance of divertor joint materials, whose heat removal performance has deteriorated due to cracks caused by heat load, by means of holding them in a high temperature and ultra-high-pressure atmosphere. The upgrading of test equipment, the development of performance monitoring methods, the clarification of crack formation conditions, the clarification of the conditions for high-temperature ultra-high-pressure treatment and for the pretreatment of the joint materials were carried out.

Academic Significance and Societal Importance of the Research Achievements

原子力施設からの放射性廃棄物の大きな部分を占めるのは使用中に発生する交換機器であり、従って劣化した機器の再生・再利用が可能なら、放射性廃棄物を著しく低減できる。
本研究に基づき、核融合炉だけでなく加速器や放射性物質を扱う原子力施設においても、頻繁に交換する機器、貴重資源を含む機器、難加工機器などが、簡易な熱間等方加圧処理によりサイトから出すことなく再利用できるようになれば、放射性廃棄物の低減、資源の有効利用に広く寄与すると期待される。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (18 results)

All 2021 2020 2019

All Journal Article (6 results) (of which Peer Reviewed: 6 results,  Open Access: 3 results) Presentation (12 results) (of which Int'l Joint Research: 5 results)

  • [Journal Article] Thermal change of microstructure and mechanical properties of dispersion strengthened tungsten2021

    • Author(s)
      Noto H.、Hishinuma Y.、Muroga T.、Tanaka T.
    • Journal Title

      Nuclear Fusion

      Volume: 61 Issue: 11 Pages: 116001-116001

    • DOI

      10.1088/1741-4326/ac233d

    • NAID

      120007181930

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Development of the brazing technique of W and JLF-1 by Ni-P filler material2021

    • Author(s)
      Yamashita T.、Tokitani M.、Hamaji Y.、Noto H.、Masuzaki S.、Muroga T.
    • Journal Title

      Fusion Engineering and Design

      Volume: 170 Pages: 112687-112687

    • DOI

      10.1016/j.fusengdes.2021.112687

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Advanced multi-step brazing for fabrication of a divertor heat removal component2021

    • Author(s)
      M. Tokitani, Y. Hamaji, Y. Hiraoka, S. Masuzaki, H. Tamura, H. Noto, T. Tanaka, T. Tsuneyoshi, Y. Tsuji, T. Muroga, A. Sagara, the FFHR Design Group
    • Journal Title

      Nuclear Fusion

      Volume: 61 Issue: 4 Pages: 046016-046016

    • DOI

      10.1088/1741-4326/abdfdb

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Formation Mechanism of Nano-Strengthening Particles in Dispersion Strengthened W-Ti Alloys2020

    • Author(s)
      NOTO Hiroyuki、HISHINUMA Yoshimitsu、MUROGA Takeo、BENOKI Hideo
    • Journal Title

      Plasma and Fusion Research

      Volume: 15 Issue: 0 Pages: 1205021-1205021

    • DOI

      10.1585/pfr.15.1205021

    • NAID

      130007840521

    • ISSN
      1880-6821
    • Year and Date
      2020-04-15
    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Application of the Advanced Multi-Step Brazing for fabrication of the high heat flux component2020

    • Author(s)
      Tokitani M.、Hamaji Y.、Hiraoka Y.、Masuzaki S.、Tamura H.、Noto H.、Tanaka T.、Muroga T.、Sagara A.
    • Journal Title

      Journal of Nuclear Materials

      Volume: 538 Pages: 152264-152264

    • DOI

      10.1016/j.jnucmat.2020.152264

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Microstructure and mechanical properties of dispersion strengthened tungsten by HIP treatment followed by thermal annealing2020

    • Author(s)
      Noto H.、Hishinuma Y.、Muroga T.、H.Benoki
    • Journal Title

      Results in Materials

      Volume: 7 Pages: 100116-100116

    • DOI

      10.1016/j.rinma.2020.100116

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] Development of Advanced Dispersion-Strengthened Tungsten Alloys for Divertor Application2021

    • Author(s)
      H. Noto, Y. Hishinuma , T. Muroga , T. Tanaka
    • Organizer
      28th IAEA Fusion Energy Conference - 2020 (FEC 2020)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Investigation of Mechanical Alloying Process for the Production of Dispersion Strengthened Tungsten2021

    • Author(s)
      H. Noto, T. Tanaka
    • Organizer
      20th International Conference on Fusion Reactor Materials (ICFRM-20)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ダイバータ受熱機器開発に向けたタングステン/低放射化フェライト鋼接合試験体における除熱特性評価法の改善2021

    • Author(s)
      山下 東洋, 時谷 政行, 浜地 志憲, 能登 裕之, 申 晶潔, 増崎 貴, 室賀 健夫, FFHR design group
    • Organizer
      プラズマ・核融合学会 年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] AMSB新構造ダイバータ受熱機器試験体のLHDダイバータプラズマへの照射試験2021

    • Author(s)
      時谷政行,浜地志憲,平岡 裕,増崎 貴,田村 仁,能登裕之,田中照也,恒 吉達矢,辻 義之,室賀健夫,相良明男,FFHR設計グループ,林 祐貴,本島 厳 ,林 浩己,村瀬尊則,森崎友宏,LHD実験グループ
    • Organizer
      プラズマ・核融合学会 年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 分散強化タングステンにおける合金化過程が組織の熱的変化に与える影響2021

    • Author(s)
      能登裕之 菱沼良光 室賀健夫
    • Organizer
      日本金属学会
    • Related Report
      2020 Research-status Report
  • [Presentation] 先進的ろう付接合法を応用したタングステンと低放射化フェライト鋼の接合技術によるダイバータ受熱機器開発2020

    • Author(s)
      山下東洋,時谷政行,浜地志憲,能登裕之,増崎 貴,室賀健夫
    • Organizer
      日本原子力学会
    • Related Report
      2020 Research-status Report
  • [Presentation] Development of the Plasma-Facing Heat Removal Component with W and JLF-1 by the Advanced Brazing Technique2020

    • Author(s)
      T. Yamashita, M. Tokitani, Y. Hamaji, H. Noto, S. Masuzaki, T. Muroga, the FFHR Design group
    • Organizer
      The 31st Symposium on Fusion Technology (SOFT2020)
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Microstructural characterization of the weld zones on ODS-Cu2020

    • Author(s)
      T. Yamashita, M. Tokitani, Y. Hamaji, H. Noto, S. Masuzaki, T. Muroga, the FFHR Design group
    • Organizer
      The 29th International Toki Conference on Plasma and Fusion Research (ITC29)
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] 微細構造評価法を用いたODS-Cuの溶接性に関する研究2020

    • Author(s)
      山下東洋,時谷政行,浜地志憲,能登裕之,増崎 貴,室賀健夫
    • Organizer
      第37回プラズマ・核融合学会年会
    • Related Report
      2020 Research-status Report
  • [Presentation] Novel Fabrication Method for High Heat Flux Component by the Multi‐Step Brazing Technique2019

    • Author(s)
      M. Tokitani, Y. Hamaji Y. Hiraoka, S. Masuzaki, H. Tamura, H. Noto, T. Tanaka, T. Muroga, A. Sagara, the FFHR Design Group
    • Organizer
      The 19th International Conference on Fusion Reactor Materials (ICFRM-19)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 多段階ろう付接合ダイバータの設計とその性能2019

    • Author(s)
      浜地 志憲,時谷 政行,辻 義之,恒吉 達矢,余 仕超,田村 仁,増崎 貴
    • Organizer
      プラズマ・核融合学会第36回年会
    • Related Report
      2019 Research-status Report
  • [Presentation] MA-HIP焼結プロセスによる分散強化Cu-Y2O3合金におけるHIP温度の影響2019

    • Author(s)
      馬 氷、菱沼 良光、能登 裕之、室賀 健夫
    • Organizer
      日本金属学会2019年秋期(第165回)講演大会
    • Related Report
      2019 Research-status Report

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Published: 2019-07-04   Modified: 2023-01-30  

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