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Experimental evaluation of neutron transport and fuel production in fusion blanket

Research Project

Project/Area Number 20K14442
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 14020:Nuclear fusion-related
Research InstitutionKyoto University

Principal Investigator

Mukai Keisuke  京都大学, エネルギー理工学研究所, 助教 (70807700)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords核融合中性子 / 燃料生産性 / ブランケット / コーティング / 中性子発生 / オンライン計測 / 中性子輸送 / 核融合 / 水素同位体 / 放射線 / 中性子計測 / 水素吸蔵合金 / 中性子 / ダイヤモンド検出器 / 放射化箔法 / トリチウム / エネルギー
Outline of Research at the Start

トリチウム増殖比が1を超えなければ核融合炉は成立しないが、炉以外の環境でTBRを評価する方法はこれまでにわかっていない。本研究では核融合炉以外の環境で燃料生産性能の評価手法の確立を目指す。核融合炉実機よりも格段に小さい模擬ブランケット体系で核融合炉と同様の白色(ミリ~メガ電子ボルト)の中性子スペクトルを発生させ、中性子束分布の計測と燃料生産性能の評価を行う。本研究は中性子のエネルギー成分に着目して核融合炉を模擬し、計算では知り得ない中性子の挙動を解明する。原型炉実証試験に先立ち、燃料生産に影響する因子の発見や重要な設計課題の抽出に繋がることが期待される。

Outline of Final Research Achievements

In this study, a compact discharge fusion neutron source was used to generate spectral neutrons with a wide energy range, and the neutron and tritium production rates were measured. The electrodes were coated with titanium to increase the neutron production rate. This coating increased the neutron generation rate by about 40%, and depth analysis of the electrodes revealed that the increased surface concentration of deuterium contributed to the increased neutron production rate. Neutron irradiation experiments were conducted with a CVD single-crystal diamond detector placed at five different positions (positions A-E) under discharge conditions of 9 mA and 60 kV. Tritons produced by the capture reaction of lithium were detected, and the tritium production rate was experimentally evaluated. It was shown that the tritium production rate can be evaluated with high accuracy using a small discharge neutron source.

Translated with www.DeepL.com/Translator (free version)

Academic Significance and Societal Importance of the Research Achievements

本研究では、電極表面へのコーティングによって中性子発生率が上昇することを示した。中性子を用いた建築物の診断やラジオグラフィなどの応用に向け、小型中性子源の高性能化に寄与する成果であると考えられる。中性子輸送実験ではモンテカルロ計算との比較により、C/E値(実験値と計算値の比)と測定誤差の評価を行った。線量の低い小型中性子源を用いて三重水素生成率を評価したのは本研究がはじめてであり、高コストな加速器を使用しない実験手法として、ブランケット試験体の燃料生産性能の評価に役立つと考えられる

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (24 results)

All 2022 2021 2020 Other

All Int'l Joint Research (3 results) Journal Article (8 results) (of which Int'l Joint Research: 5 results,  Peer Reviewed: 8 results,  Open Access: 2 results) Presentation (9 results) (of which Int'l Joint Research: 3 results) Remarks (4 results)

  • [Int'l Joint Research] Bristol University(英国)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] Karlsruhe Institute of Technology(ドイツ)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] Assiut University(エジプト)

    • Related Report
      2021 Research-status Report
  • [Journal Article] Effects of Metal Hydride Coatings at the Electrodes on Neutron Production Rate in a Discharge-Type Fusion Neutron Source2022

    • Author(s)
      Sakabe T.、Kenjo S.、Ogino Y.、Mukai K.、Bakr M.、Yagi J.、Konishi S.
    • Journal Title

      IEEE Transactions on Plasma Science

      Volume: 50 Issue: 11 Pages: 4500-4505

    • DOI

      10.1109/tps.2022.3182723

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Hydrogen permeation from F82H wall of ceramic breeder pebble bed: The effect of surface corrosion2022

    • Author(s)
      Mukai Keisuke、Kenjo Shunsuke、Iwamatsu Naoto、Mahmoud Bakr、Chikada Takumi、Yagi Juro、Konishi Satoshi
    • Journal Title

      International Journal of Hydrogen Energy

      Volume: 47 Issue: 9 Pages: 6154-6163

    • DOI

      10.1016/j.ijhydene.2021.11.225

    • Related Report
      2022 Annual Research Report 2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Electronic descriptors for vacancy formation and hydrogen solution in Be-rich intermetallics2022

    • Author(s)
      Mukai Keisuke、Kasada Ryuta、Kim Jae-Hwan、Nakamichi Masaru
    • Journal Title

      Acta Materialia

      Volume: 241 Pages: 118428-118428

    • DOI

      10.1016/j.actamat.2022.118428

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Employing of ZrCo as a fuel source in a discharge-type fusion neutron source operated in self-sufficient mode2022

    • Author(s)
      Kenjo Shunsuke、Ogino Yasuyuki、Mukai Keisuke、Bakr Mahmoud、Yagi Juro、Konishi Satoshi
    • Journal Title

      International Journal of Hydrogen Energy

      Volume: 47 Issue: 5 Pages: 3054-3062

    • DOI

      10.1016/j.ijhydene.2021.10.250

    • Related Report
      2022 Annual Research Report 2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Evaluation of tritium production rate in a blanket mock-up using a compact fusion neutron source2021

    • Author(s)
      Mukai Keisuke、Ogino Yasuyuki、Kobayashi Makoto I.、Mahmoud Bakr、Yagi Juro、Ogawa Kunihiro、Isobe Mitsutaka、Konishi Satoshi
    • Journal Title

      Nuclear Fusion

      Volume: 61 Issue: 4 Pages: 046034-046034

    • DOI

      10.1088/1741-4326/abe4e7

    • NAID

      120007144996

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Simulations for practical measurement methods of spatial neutron distribution inside blanket mock-up irradiated with DT neutrons2021

    • Author(s)
      Ogino Yasuyuki、Mukai Keisuke、Yagi Juro、Konishi Satoshi
    • Journal Title

      Fusion Engineering and Design

      Volume: 168 Pages: 112417-112417

    • DOI

      10.1016/j.fusengdes.2021.112417

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Evaluation of 3D printed buckyball-shaped cathodes of titanium and stainless-steel for IEC fusion system2021

    • Author(s)
      Bakr Mahmoud、Wulfk?hler Jan-Philipp、Mukai Keisuke、Masuda Kai、Tajmar Martin、Konishi Satoshi
    • Journal Title

      Physics of Plasmas

      Volume: 28 Issue: 1 Pages: 012706-012706

    • DOI

      10.1063/5.0033342

    • NAID

      120006958070

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Characterization of an ultra-compact neutron source based on an IEC fusion device and its prospective applications in radiography2021

    • Author(s)
      Bakr Mahmoud、Mukai Keisuke、Masuda Kai、Yagi Juro、Konishi Satoshi
    • Journal Title

      Fusion Engineering and Design

      Volume: 167 Pages: 112346-112346

    • DOI

      10.1016/j.fusengdes.2021.112346

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] 単結晶CVDダイヤモンド検出器を用いたブランケット模擬体系内の高速中性子束と燃料生産性の評価2022

    • Author(s)
      向井啓祐,荻野靖之,松尾拓海,坂部俊郎,八木重郎,小林真,小川国大,磯部光孝,玉置真悟,村田勲
    • Organizer
      第39回 プラズマ・核融合学会 年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] DT中性子照射下におけるブランケット模擬体系内の燃料生産性評価2022

    • Author(s)
      向井啓祐,荻野靖之,松尾拓海,坂部俊郎,八木重郎,小林真,小川国大,磯部光孝,玉置真悟,村田勲
    • Organizer
      日本原子力学会2022年秋の大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 固体増殖材ペブル充填層のF82H壁面における水素透過挙動2021

    • Author(s)
      向井 啓祐、見城 俊介、岩松 尚杜、バクル マハムド、近田 拓未、八木 重郎、小西 哲之
    • Organizer
      日本原子力学会
    • Related Report
      2021 Research-status Report
  • [Presentation] 見城 俊介、荻野 靖之、向井 啓祐、Mahmoud Bakr、八木 重郎、小西 哲之2021

    • Author(s)
      燃料の自己供給回収システムを備えた放電型核融合中性子源の開発
    • Organizer
      日本原子力学会
    • Related Report
      2021 Research-status Report
  • [Presentation] Structural analysis and chemical behavior of tritium breeding materials2021

    • Author(s)
      K. Mukai, R. Knitter, T. Hoshino, T. Terai, S. Kenjo, N. Iwamatsu, T. Chikada, J.o Yagi, S. Konishi
    • Organizer
      20th International Conference on Fusion Reactor
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Self-sufficient system for a compact discharge-type fusion neutron source using ZrCo as a fuel source2021

    • Author(s)
      S. Kenjo, Y. Ogino, K. Mukai, M. Bakr, J. Yagi, S. Konishi
    • Organizer
      20th International Conference on Fusion Reactor
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Simulations for practical measurement of spatial neutron distribution inside blanket mock-up irradiated with DT neutrons2020

    • Author(s)
      Yasuyuki Ogino, Keisuke Mukai, Juro Yagi, Satoshi Konishi
    • Organizer
      31st Symposium on Fusion Technology
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] 中性子輸送計算によるブランケット模擬体系内部の中性子空間分布の計算および実験にむけた検討2020

    • Author(s)
      荻野 靖之、向井 啓祐、八木 重郎、小西 哲之
    • Organizer
      日本原子力学会 2020年秋の大会
    • Related Report
      2020 Research-status Report
  • [Presentation] 放電型核融合中性子源による模擬ブランケットへの中性子照射とトリチウム 生成率計測2020

    • Author(s)
      向井啓祐、荻野靖之、小林真、Bakr Mahmoud、八木重郎、小川国大、磯部光孝、小西哲之
    • Organizer
      プラズマ・核融合学会 第37回年会
    • Related Report
      2020 Research-status Report
  • [Remarks] 燃料自己自給型の核融合中性子源を開発

    • URL

      https://bit.ly/3EcTZbW

    • Related Report
      2021 Research-status Report
  • [Remarks] ぺブル充填層壁の腐食と水素透過の抑制効果

    • URL

      http://www.atomic-energy.iae.kyoto-u.ac.jp/2021/12/20/hydrogen-corrosion-ceramicbreeder/

    • Related Report
      2021 Research-status Report
  • [Remarks] 放電型核融合中性子源を使ったブランケット中性子輸送試験

    • URL

      http://www.atomic-energy.iae.kyoto-u.ac.jp/?p=3921

    • Related Report
      2020 Research-status Report
  • [Remarks] 3Dプリンタで製造された電極を用いた核融合中性子の発生

    • URL

      http://www.atomic-energy.iae.kyoto-u.ac.jp/?p=3903

    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2024-01-30  

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