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Experimental evaluation of tritium breeding ratio in fusion blanket mock-up

Research Project

Project/Area Number 17H06794
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeSingle-year Grants
Research Field Nuclear fusion studies
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) 2017-08-25 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords核融合 / 中性子 / ブランケット / イメージングプレート / 中性子源 / ニュートロニクス / 中性子照射 / トリチウム / 中性子計測 / 核融合ブランケット / 核融合中性子 / 中性子検出 / トリチウム増殖 / 放電型核融合中性子源
Outline of Final Research Achievements

This study aims to evaluate tritium breeding ratio experimentally by using a discharge-type DD fusion neutron source. By optimizing the discharge condition of the source (current, applied voltage, and gas pressure), the neutron production rate increased and finally achieved more than 10^7 n/s. By employing neutron imaging plate with Gd convertor, linear relationships between neutron fluence (n/cm^2) and photo-stimulated luminescence density (PSL/cm^2) depending on neutron energy were obtained. From a neutron "shadow image" caused by 6Li (n, T) neutron capture reaction, tritium production and tritium breeding ratio were successfully evaluated.

Academic Significance and Societal Importance of the Research Achievements

ブランケットは核融合炉内で燃料(トリチウム)の生産や熱の回収を行う重要な機器であり、特にトリチウム増殖比は炉の燃料自己自給性を示す重要指標である。増殖材への中性子照射実験はトリチウムの回収挙動の解明を目的としたものが中心であり、トリチウム増殖比の評価はシミュレーション研究が中心となっていた。本研究では小型中性子源と中性子イメージングプレートを用い、極微量のトリチウム生産量の評価手法をはじめて示した。本手法は1ピクセルあたり1つの中性子を検知できる感度の高い検出手法であり、微量トリチウムの評価が可能になることから、燃料生産性能の評価実験に利用されると期待される。

Report

(3 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Annual Research Report
  • Research Products

    (8 results)

All 2019 2018

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (6 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Preparation for a neutronics experiment using a discharge fusion device and an imaging plate neutron detector2019

    • Author(s)
      Mukai Keisuke、Konishi Satoshi
    • Journal Title

      Fusion Engineering and Design

      Volume: in press Pages: 1633-1636

    • DOI

      10.1016/j.fusengdes.2019.03.005

    • NAID

      120006724637

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Preliminary Results of Neutron Transport in Blanket Module by MCNP with Profile Analysis using Imaging Plate2019

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

      Fusion Science and Technology

      Volume: in press

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Presentation] 中性子イメージングプレートを用いたトリチウム生産量の評価2018

    • Author(s)
      向井啓祐 ,荻野靖之 ,八木重郎 ,小西哲之
    • Organizer
      第35回 プラズマ・核融合学会 年会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Benchmarking of Neutron Transport in Blanket Module by MCNP with Profile Analysis with Imaging Plate2018

    • Author(s)
      Yasuyuki Ogino, Keisuke Mukai, Juro Yagi, Satoshi Konishi
    • Organizer
      23rd Topical Meeting on the Technology of Fusion Energy (TOFE)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Fusion neutron generation and two-dimensional neutron measurement by imaging plate detector2018

    • Author(s)
      Keisuke Mukai, Satoshi Konishi
    • Organizer
      30th Symposium on Fusion Technology (SOFT)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 放電型DD核融合中性子源を用いた実験体系中の中性子束分布の評価2018

    • Author(s)
      向井 啓祐、八木 重郎、小西 哲之
    • Organizer
      日本原子力学会 2018年秋の大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 放電型中性子源を用いた実験体系中の中性子束分布の評価2018

    • Author(s)
      向井 啓祐、小西 哲之
    • Organizer
      日本原子力学会2018春の年会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 放電型中性子源を用いた実験体系中の中性子束分布の評価2018

    • Author(s)
      向井 啓祐、小西 哲之
    • Organizer
      日本原子力学会春の年会
    • Related Report
      2017 Annual Research Report

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Published: 2017-08-25   Modified: 2022-12-28  

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