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Study of the dynamics of radon in the living environment for a risk-adapted society

Research Project

Project/Area Number 21K10426
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 58020:Hygiene and public health-related: including laboratory approach
Research InstitutionJapan Atomic Energy Agency

Principal Investigator

Sakoda Akihiro  国立研究開発法人日本原子力研究開発機構, 核燃料・バックエンド研究開発部門 人形峠環境技術センター, 研究職 (50603221)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2022: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2021: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywordsラドン / トロン / 発生 / 移流 / 拡散 / リスク
Outline of Research at the Start

本研究は生活環境中に存在するラドンの動態解明に向けて、屋内外でラドンや気象を連続測定し、ラドン濃度の変動を数理モデルや統計モデルで解析する。また、様々な科学的知見と社会のあいだに存在する科学者のあり方についての考察を行うとともに、これに資するリスク評価をラドンをモデルケースとして行う。

Outline of Final Research Achievements

Radon (Rn-222) and thoron (Rn-220) are natural radioactive inert gases that are ubiquitous in the living environment, making it important to understand their environmental fate and health effects and public risk perception. In this study, various indoor and outdoor measurements and model analyses were performed to clarify the spatio-temporal variation of radon and thoron in a model room. This study was the first attempt to focus specifically on in-situ measurements for building materials as sources of radon and thoron. We also conducted a risk assessment of indoor radon for the Japanese population and found that the effect (reduction of lung cancer deaths) of introducing the reference level recommended by international organizations was limited.

Academic Significance and Societal Importance of the Research Achievements

ラドンやトロンに関する環境動態の一連のプロセス(発生から被ばくまで)を理解することで、今日、国内外で高い関心が示されている屋内ラドン・トロンについて、低減等の技術的可能性を拡大することができる。また、屋内ラドンへの対応には公衆のリスク認知も重要で、関係者(専門家を含む)による説明のあり方が問われている。本研究成果は、これら課題に対して大きく貢献すると考える。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (7 results)

All 2024 2023 2022 2021

All Journal Article (4 results) (of which Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (3 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Improved data analysis techniques for calculating more accurate radon and thoron exhalation rates from building interior solid walls2024

    • Author(s)
      Sakoda Akihiro、Ishimori Yuu、Jin Qianhao、Iimoto Takeshi
    • Journal Title

      Applied Radiation and Isotopes

      Volume: 207 Pages: 111180-111180

    • DOI

      10.1016/j.apradiso.2024.111180

    • Related Report
      2023 Annual Research Report
  • [Journal Article] Radon solubility and diffusion in the skin surface layer2022

    • Author(s)
      Sakoda Akihiro、Ishida Tsuyoshi、Kanzaki Norie、Tanaka Hiroshi、Kataoka Takahiro、Mitsunobu Fumihiro、Yamaoka Kiyonori
    • Journal Title

      International Journal of Environmental Research and Public Health

      Volume: 19 Issue: 13 Pages: 7761-7761

    • DOI

      10.3390/ijerph19137761

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Review of engagement activities to promote awareness of radiation and its associated risk amongst the Japanese public before and after the Fukushima Daiichi Nuclear Power Plant accident2021

    • Author(s)
      Sakoda Akihiro、Nomura Naoki、Kuroda Yujiro、Kono Takahiko、Naito Wataru、Yoshida Hiroko
    • Journal Title

      Journal of Radiological Protection

      Volume: 41 Issue: 4 Pages: 1258-1287

    • DOI

      10.1088/1361-6498/ac2678

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Status of radon exposure in Bangladeshi locations and dwellings2021

    • Author(s)
      Hasan Md. Mahamudul、Janik Miroslaw、Sakoda Akihiro、Iimoto Takeshi
    • Journal Title

      Environmental Monitoring and Assessment

      Volume: 193 Issue: 12 Pages: 1-10

    • DOI

      10.1007/s10661-021-09571-4

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] In-situ measurement of radon and thoron exhalation rates from interior walls in a Japanese building2023

    • Author(s)
      Sakoda Akihiro、Ishimori Yuu、Hasan Md. Mahamudul、Jin Qianhao、Kanzaki Norie、Iimoto Takeshi
    • Organizer
      7th International Conference on Environmental Radioactivity
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 日本における屋内ラドンのリスクと参考レベルの効果推定2023

    • Author(s)
      迫田晃弘、石森有
    • Organizer
      日本保健物理学会第56回研究発表会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 建物内壁からのラドン散逸率のin-situ測定2022

    • Author(s)
      迫田晃弘、Md. Mahamudul Hasan、飯本武志
    • Organizer
      第4回日本保健物理学会・日本放射線安全管理学会合同大会
    • Related Report
      2022 Research-status Report

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Published: 2021-04-28   Modified: 2025-01-30  

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