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Tritiumu measurement in foods by whole quenching correction method in LSC

Research Project

Project/Area Number 17K07006
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Nuclear engineering
Research InstitutionUniversity of Toyama

Principal Investigator

hara masanori  富山大学, 学術研究部理学系, 准教授 (00334714)

Co-Investigator(Kenkyū-buntansha) 阿蘇 司  富山高等専門学校, その他部局等, 教授 (30290737)
庄司 美樹  富山大学, 研究推進機構 研究推進総合支援センター, 准教授 (30361950)
Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2019: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2017: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Keywordsトリチウム測定 / 液体シンチレーションカウンタ / クエンチング校正 / クエンチング補正 / 有色試料 / 放射線 / クエンチング / 食品
Outline of Final Research Achievements

To obtain the activity of tritium by LSC, the quenching correction is indispensable. The two-dimensional scintillation spectra were measured by the conventional LSC connected with an external multi-channel analyzer. In less quenching cocktail, two-dimensional scintillation spectra were extended along the 45 deg. line. The shape of spectrum was changed into a kind of sector with increasing the color quenching. Therefore, the shape of spectrum would give the information of color quenching. However, the influence of color quenching was, qualitatively, less significant for the relationship between the counting efficiency of tritium and the quenching index parameter. The analysis method of two-dimensional spectrum should be considered to clearly separate the influence of color quenching.

Academic Significance and Societal Importance of the Research Achievements

福島第一原子力発電所事故の収束作業に伴い,トリチウムを含む処理水が日々発生し,敷地内に貯水されている.処理水中のトリチウム濃度を迅速に測定する手法と社会的な要請として食品中のトリチウム濃度測定を行う手法が必要である.
液体シンチレーション計測法は,液体中のトリチウムを高感度で測定できる唯一の方法である.しかし,この計測法において正確なトリチウム濃度を求めるには,試料のクエンチング評価が必要不可欠である.カラークエンチングの影響を避けるための脱色処理に時間がかかるために迅速な測定ができない.本研究ではカラークエンチングの評価手法に関する研究を行った.

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (7 results)

All 2019 2018 2017

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (6 results)

  • [Journal Article] Quenching Correction with Two-Dimensional Scintillation Spectrum in Tritium Measurement2019

    • Author(s)
      Hara Masanori、Shoji Miki、Aso Tsukasa
    • Journal Title

      Fusion Science and Technology

      Volume: - Issue: 3 Pages: 1-7

    • DOI

      10.1080/15361055.2019.1661720

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Presentation] Quenching correction with two-dimensional scintillation spectrum in tritium measurement2019

    • Author(s)
      Masnaori HARA
    • Organizer
      Tritium 2019
    • Related Report
      2019 Annual Research Report
  • [Presentation] 汎用液体シンチレーションカウンタからの2次元シンチレーションスペクトルの測定2018

    • Author(s)
      原正憲、庄司美樹、阿蘇司、古澤孝良、益田拓朗、加藤結花、藤澤信司
    • Organizer
      第55回 アイソトープ・放射線研究発表会
    • Related Report
      2018 Research-status Report
  • [Presentation] シミュレーションを用いた液体シンチレータの発生光子数に関する検証2018

    • Author(s)
      比嘉悠介, 阿蘇司
    • Organizer
      平成29年度北陸地区学生による研究発表会
    • Related Report
      2017 Research-status Report
  • [Presentation] Study of counting efficiency with trilpe to double coincidence ratio in liquid scintillation counter by using Geant4.2017

    • Author(s)
      Aso T, Masuda T, Hara M, Shoji M, Furusawa T, Yoshimura T, Kato Y, Higa. Y
    • Organizer
      2017 IEEE Nuclear Science Symposium and Medical Imaging Conference, 24th Symposium on Room-Temperature X- and Gamma-Ray Detectors
    • Related Report
      2017 Research-status Report
  • [Presentation] Estimation of photon yield in liquid scintillation counter by using Geant4 Monte Carlo simulation2017

    • Author(s)
      Aso T, Hara M, Shoji M, Furusawa T, Yoshimura T, Kato Y
    • Organizer
      9th International Symposium On Radiation Safety and Detection Technology
    • Related Report
      2017 Research-status Report
  • [Presentation] Geant4シミュレーションを用いた液体シンチレーションカウンタのTDCR特性評価2017

    • Author(s)
      5) 阿蘇 司,益田拓朗,原 正憲,庄司美樹,古澤孝良,吉村共之,加藤結花
    • Organizer
      第54回アイソトープ・放射線研究発表会
    • Related Report
      2017 Research-status Report

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Published: 2017-04-28   Modified: 2021-02-19  

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