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

Elucidation of mechanism for tritium accumulation to soil and proof of principle for new decontamination method

Research Project

Project/Area Number 19H01877
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 14020:Nuclear fusion-related
Research InstitutionKyushu University

Principal Investigator

Katayama Kazunari  九州大学, 総合理工学研究院, 准教授 (90380708)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000)
Fiscal Year 2021: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2020: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2019: ¥8,190,000 (Direct Cost: ¥6,300,000、Indirect Cost: ¥1,890,000)
Keywordsトリチウム / トリチウム水 / 土壌 / 粘土鉱物 / 同位体交換 / マイクロ波加熱 / 環境保全 / 有機結合型トリチウム / 酸溶解 / 植物 / 液体シンチレーションカウンター
Outline of Research at the Start

環境中トリチウム挙動は、社会的に注目されており、科学的根拠を背景とした移行モデルの構築と挙動予測が求められている。またトリチウム漏洩事故後の環境回復を実現するためには、効果的なトリチウム除染法を見出すことも望まれる。そこで本研究では、土壌へのトリチウム蓄積機構の解明を目的とし、土壌蓄積トリチウム全量評価法を確立する。加えて、同位体交換反応を利用した新規高効率トリチウム除染法の原理実証を行う。

Outline of Final Research Achievements

The positions of the tritium release peak due to heating from the natural soil sample immersed in tritiated water and the water release peak were the same. This suggests that tritium is taken up by the water or hydrogen existing in the soil through an adsorption reaction or an isotope exchange reaction, respectively. It was revealed that the amount of tritium released by dissolving the soil by the microwave-assisted acid dissolution method is larger than the amount of tritium released by heating to 1000 ℃. This indicates that it is difficult to recover all tritium from tritium-contaminated soil only by heating, and complete dissolution is required. Arabidopsis thaliana was grown in tritium-containing soil, and a part of the tritium supplied to the soil was accumulated as organic bound tritium.

Academic Significance and Societal Importance of the Research Achievements

高度な社会文明を維持するために必要なエネルギーを継続的に安定して供給可能なエネルギー源として、核融合炉の実現が期待されている。しかしながら、核融合炉が社会に受け入れられるためには、万が一の事故により燃料トリチウムが施設外へ漏洩した際の環境・公衆への影響を科学的根拠に基づいて説明することが求められる。本研究は、トリチウム水が土壌に漏洩した際のトリチウム挙動を解明するものであり、核融合炉の受容性向上の観点から社会的意義は大きい。また、土壌中でのトリチウム移動現象は解明されておらず、本研究で得られるトリチウム実験による成果は学術的意義が大きい。

Report

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

    (16 results)

All 2021 2020 2019

All Journal Article (4 results) (of which Peer Reviewed: 4 results) Presentation (12 results) (of which Int'l Joint Research: 4 results)

  • [Journal Article] Accumulation of organically bound tritium in Arabidopsis thaliana cultivated in soil containing tritiated water2021

    • Author(s)
      Takahiro Matano, Kazunari Katayama, Toshiharu Takeishi
    • Journal Title

      Fusion Engineering and Design

      Volume: 173 Pages: 112787-112787

    • DOI

      10.1016/j.fusengdes.2021.112787

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Hydrogen permeation behavior through tungsten deposition layer2021

    • Author(s)
      Ito Hideki、Katayama Kazunari、Mori Daisuke、Hara Yuki、Oya Makoto
    • Journal Title

      Fusion Engineering and Design

      Volume: 162 Pages: 112083-112083

    • DOI

      10.1016/j.fusengdes.2020.112083

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Influence of Lithium Mass Transfer on Tritium Behavior in Pebbles of Li2TiO3 with Excess Lithium2020

    • Author(s)
      Katayama Kazunari、Ipponsugi Akito、Hoshino Tsuyoshi
    • Journal Title

      Fusion Engineering and Design

      Volume: 161 Pages: 112011-112011

    • DOI

      10.1016/j.fusengdes.2020.112011

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Li mass loss and structure change due to long time heating in hydrogen atmosphere from Li2TiO3 with excess Li2020

    • Author(s)
      Ipponsugi Akito、Katayama Kazunari、Hoshino Tsuyoshi
    • Journal Title

      Nuclear Materials and Energy

      Volume: 25 Pages: 100777-100777

    • DOI

      10.1016/j.nme.2020.100777

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Presentation] 水草へのトリチウム蓄積に関する研究2021

    • Author(s)
      和田優太郎、片山一成、大宅 諒、一本杉旭人、俣野貴宏
    • Organizer
      日本原子力学会秋の大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] トリチウム水を含む土壌で栽培したコマツナ内の有機結合型トリチウムの蓄積量の測定2021

    • Author(s)
      俣野貴宏、片山一成、竹石敏治
    • Organizer
      プラズマ・核融合学会第38回年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] トリチウム水中で育成した水草へのトリチウム取込量評価2021

    • Author(s)
      片山一成,和田優太郎,俣野貴宏,大宅 諒,竹石敏治
    • Organizer
      プラズマ・核融合学会第38回年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 土壌から植物へのトリチウム移行挙動に関する研究2021

    • Author(s)
      片山 一成,俣野 貴宏,和田 優太郎
    • Organizer
      日本原子力学会2021年春の年会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Accumulation of organically bound tritium in arabidopsis thaliana cultivated in soil containing tritiated water2020

    • Author(s)
      Takahiro Matano, Kazunari Katayama, Toshiharu Takeishi
    • Organizer
      The 31th Symposium on Fusion Technology (SOFT2020)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Study on tritium transfer to plants from soil exposed to tritiated water2020

    • Author(s)
      Takahiro Matano, Kazunari Katayama, Toshiharu Takeishi
    • Organizer
      Technology of Fusion Energy (TOFE2020)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Tritium trapping in natural soil immersed in tritiated water2020

    • Author(s)
      Kazunari Katayama, Daiki Ishii, Yuji Hatano, Akira Taguchi
    • Organizer
      Technology of Fusion Energy (TOFE2020)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Measurement of tritium trapped in natural soil by microwave assisted acid dissolution method2019

    • Author(s)
      Kazunari Katayama, Daiki Ishii, Toshiharu Takeishi, Satoshi Fukada
    • Organizer
      12th International Conference on Tritium Science and Technology
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 土壌からの水分放出挙動とトリチウム放出挙動の比較2019

    • Author(s)
      片山 一成,石井 大貴,俣野 貴宏,大宅 諒,竹石 敏治
    • Organizer
      日本原子力学会2019年秋の大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] マイクロ波支援酸溶解法によるトリチウム水浸漬土壌からのトリチウム回収2019

    • Author(s)
      石井 大貴,片山 一成,竹石 敏治
    • Organizer
      日本原子力学会2019年秋の大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 土壌から植物へのトリチウム移行に関する研究2019

    • Author(s)
      片山一成,俣野貴宏,石井大貴,大宅 諒,竹石敏治
    • Organizer
      プラズマ・核融合学会第36回年会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 土壌から植物へのトリチウムの移行2019

    • Author(s)
      俣野貴宏,片山一成,石井大貴,大宅 諒,竹石敏治
    • Organizer
      日本原子力学会九州支部第38回研究発表講演会
    • Related Report
      2019 Annual Research Report

URL: 

Published: 2019-04-18   Modified: 2023-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi