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The elucidation that is in chemistry form to investigate an environmental shift of fine particles emitted by Fukushima nuclear reactor accident

Research Project

Project/Area Number 18H04150
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Review Section Medium-sized Section 64:Environmental conservation measure and related fields
Research InstitutionKyoto University

Principal Investigator

Ohtsuki Tsutomu  京都大学, 複合原子力科学研究所, 特任教授 (50233193)

Co-Investigator(Kenkyū-buntansha) 関本 俊  京都大学, 複合原子力科学研究所, 助教 (10420407)
沖 雄一  京都大学, 複合原子力科学研究所, 准教授 (40204094)
高宮 幸一  京都大学, 複合原子力科学研究所, 准教授 (70324712)
篠原 厚  大阪大学, 理学研究科, 教授 (60183050)
末木 啓介  筑波大学, 数理物質系, 教授 (90187609)
Project Period (FY) 2018-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥43,940,000 (Direct Cost: ¥33,800,000、Indirect Cost: ¥10,140,000)
Fiscal Year 2021: ¥6,630,000 (Direct Cost: ¥5,100,000、Indirect Cost: ¥1,530,000)
Fiscal Year 2020: ¥6,630,000 (Direct Cost: ¥5,100,000、Indirect Cost: ¥1,530,000)
Fiscal Year 2019: ¥13,390,000 (Direct Cost: ¥10,300,000、Indirect Cost: ¥3,090,000)
Fiscal Year 2018: ¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Keywords原発事故 / 環境放射能 / 放射性微粒子 / 放射性エアロゾル / 核分裂生成物 / 廃炉 / 原子力事故 / 放射性模擬微粒子 / 分析技術 / エアロゾル / 放射性物質 / 炉内微粒子 / 研究用原子炉 / 炉内事象 / 環境動態
Outline of Final Research Achievements

We performed the generation experiments of radioactive fine particle and an outbreak experiments of the artificial radioactive aerosol to simulate the behavior of the radioactive fine particle and aerosol in a furnace of Fukushima Daiichi Nuclear Power Station (FDNPS). The elucidation of growth and transport mechanism of the radioactive particles (and aerosol) including plural nuclides in the FDNPS can be further investigated by the facts. Firstly, we performed analysis using SEM-EDX, the generation experiment of quasi fine particles has been performed to check the property of the radioactive fine particles emitted during environment. Then, we considered about the temperature dependence of generated quasi fine particles. Furthermore, we performed a simulation of growth and transportation of the artificial radioactive solution aerosol including fission products using the uranic dioxide which irradiated a neutron. Finally, we got the clue which supposed the situation in the FDNPS.

Academic Significance and Societal Importance of the Research Achievements

放射性微粒子の模擬生成実験や人工放射性エアロゾルの発生実験を行った。複数の放射性核種を含む微粒子やエアロゾルの成長・輸送機構の解明により1Fの炉内に残留する放射性微粒子の挙動を推測する手がかりを得た。環境中に放出された放射性微粒子の性状を調べるため、SEM-EDXを用いた分析をもとに模擬微粒子の生成実験を行い、生成される微粒子の加熱温度依存性について検討を行った。また、中性子照射した二酸化ウランを用いて、核分裂生成物を含む人工の放射性溶液エアロゾル粒子の成長・輸送の模擬実験を行った。これらの結果から実炉内の状況を推測し、廃炉に向けた作業等への知見を得た。

Report

(5 results)
  • 2022 Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • Research Products

    (32 results)

All 2022 2021 2020 2019 2018

All Journal Article (13 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 13 results,  Open Access: 3 results) Presentation (19 results) (of which Int'l Joint Research: 3 results,  Invited: 2 results)

  • [Journal Article] Measurement of neutron flux parameters for implementation of k0-INAA at Kyoto University Research Reactor2022

    • Author(s)
      Soliman Mohamed、Abdou Fatma S.、Ho Van-Doanh、Sekimoto Shun、Takamiya Koichi、Mohamed Nader M. A.、Ohtsuki Tsutomu
    • Journal Title

      Journal of Radioanalytical and Nuclear Chemistry

      Volume: 331 Issue: 9 Pages: 3949-3956

    • DOI

      10.1007/s10967-022-08391-1

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] 福島原発事故に由来する不溶性放射性微粒子のレーザー加熱による模擬生成実験2022

    • Author(s)
      稲垣誠, 関本俊, 高宮幸一, 沖雄一, 大槻勤
    • Journal Title

      Proceedings of the 23rd Workshop on Environmental Radioactivity

      Volume: 2022 Pages: 159-164

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Coprecipitation with samarium hydroxide using multitracer produced through neutron-induced fission of 235U toward chemical study of heavy elements2022

    • Author(s)
      Kasamatsu Yoshitaka、Nagase Masahiro、Ninomiya Hidemi、Watanabe Eisuke、Shigekawa Yudai、Kondo Narumi、Takamiya Koichi、Ohtsuki Tsutomu、Shiohara Naoya、Shinohara Atsushi
    • Journal Title

      Applied Radiation and Isotopes

      Volume: 179 Pages: 110006-110006

    • DOI

      10.1016/j.apradiso.2021.110006

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Co-precipitation behaviour of single atoms of rutherfordium in basic solutions2021

    • Author(s)
      Y. Kasamatsu, K. Toyomura, H. Haba, T. Yokokita, A. Kino, Y. Yasuda, Y. Komori, J. Kanaya, M.H. Huang, M. Murakami, H. Kikunaga, E. Watanabe, T. Yoshimura, K. Morita, T. Mitsugashira, K. Takamiya, T. Ohtsuki, A. Shinohara
    • Journal Title

      NATURE CHEMISTRY

      Volume: 13 Issue: 3 Pages: 226-230

    • DOI

      10.1038/s41557-020-00634-6

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Uncertainty derived from elemental analysis and its effect on the separation of radioactive waste into low-level radioactive waste and waste for clearance2021

    • Author(s)
      N. Kinoshita, T. Noto, K. Kosako, M. Aasada, K. Torii, A. Tada, K. Urabe, T. Ohtsuki, S. Sekimoto
    • Journal Title

      Progress in Nuclear Energy

      Volume: 131 Pages: 103597-103597

    • DOI

      10.1016/j.pnucene.2020.103597

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Design and testing of a W-MoO3 target system for electron linac production of 99Mo/99mTc2021

    • Author(s)
      J. Jang, H. Kikunaga, S. Sekimoto, M. Inagaki, T. Kawakami, T. Ohtsuki, Sh. Kashiwagi, K. Takahashi, K. Tsukada, K. Tatenuma, M. Uesaka
    • Journal Title

      Nuclear Instruments and Methods in Physics Research A

      Volume: 987 Pages: 164815-164815

    • DOI

      10.1016/j.nima.2020.164815

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Creation of Mo/Tc@C<sub>60</sub> and Au@C<sub>60</sub> and molecular-dynamics simulations2021

    • Author(s)
      Ohtsuki Tsutomu、Manjanath Aaditya、Ohno Kaoru、Inagaki Makoto、Sekimoto Shun、Kawazoe Yoshiyuki
    • Journal Title

      RSC Advances

      Volume: 11 Issue: 32 Pages: 19666-19672

    • DOI

      10.1039/d0ra10196f

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Investigation of variations in cobalt and europium concentrations in concrete to prepare for accelerator decommissioning2020

    • Author(s)
      Go Yoshida, Koichi Nishikawa, Hajime Nakamura, Hiroshi Yashima, Shun Sekimoto, Taichi Miura, Kazuyoshi Masumoto, Akihiro Toyoda, Hiroshi Matsumura
    • Journal Title

      Journal of Radioanalytical and Nuclear Chemistry

      Volume: 325 Issue: 3 Pages: 801-806

    • DOI

      10.1007/s10967-020-07212-7

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Isolation, characterization and source analysis of radiocaesium micro-particles in soil sample collected from vicinity of Fukushima Dai-ichi nuclear power plant2020

    • Author(s)
      Futagami, F., Soliman, M., Takamiya, K., Sekimoto, S., Oki, Y., Kubota, T., Konno, M., Mizuno, S., Ohtsuki, T.
    • Journal Title

      Journal of Environmental Radioactivity

      Volume: 223-224 Pages: 106388-106388

    • DOI

      10.1016/j.jenvrad.2020.106388

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Estimation of 47Sc and 177Lu production-rates from their natural targets in Kyoto University Research Reactor2020

    • Author(s)
      M. Sliman, N.M.A. Mohamed, K. Takamiya, S. Sekimoto, M. Inagaki, Y. Oki, T. Ohtsuki
    • Journal Title

      Journal of Radioanalytical and Nuclear Chemistry

      Volume: in press Issue: 3 Pages: 1099-1107

    • DOI

      10.1007/s10967-020-07156-y

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Basic consideration of a nuclear power monitoring system using neutron-in duced prompt gamma rays2020

    • Author(s)
      Koichi Okada, Atsushi Fushimi, Shun Sekimoto, Tsutomu Ohtsuki
    • Journal Title

      Journal of Nuclear Science and Technology

      Volume: 57 Issue: 5 Pages: 514-522

    • DOI

      10.1080/00223131.2019.1699187

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Production of 99Mo/99mTc by photonuclear reaction using a nat-MoO3 target2020

    • Author(s)
      M. Inagaki, S. Sekimoto, W. Tanaka, T. Tadokoro, Y. Ueno, Y. Kani, T. Ohtsuki
    • Journal Title

      Journal of Radioanalytical and Nuclear Chemistry

      Volume: in press Issue: 2 Pages: 681-686

    • DOI

      10.1007/s10967-020-07086-9

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Use of different surface covering materials to enhance removal of radiocaesium in plants and upper soil from orchards in Fukushima prefecture2018

    • Author(s)
      M. Sato, H. Akai, Y. Saito, T. Takase, H. Kikunaga, N. Sekiya, T. Ohtsuki, K. Yamaguchi
    • Journal Title

      Journal of Environmental Radioactivity

      Volume: in press Pages: 204-211

    • DOI

      10.1016/j.jenvrad.2017.03.022

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] 電子線形加速器を利用した225Acスケールアップ製造及び薬剤標識実験2022

    • Author(s)
      前田瑞穂, 田所孝広, 上野雄一郎, 可児祐子, 西田賢人, 渡辺敬仁, 佐々木貴裕, 菊永英寿, 柏木茂, 白崎謙次,吉本光喜,大貫和信,藤 井博史, 大槻勤,関本俊,稲垣誠,福谷哲,芝原雄司
    • Organizer
      日本原子力学会 2022年秋の大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Production experiments for 225Ac using an electron linear accelerator and radiolabeling tests using the produced alpha emitter2022

    • Author(s)
      M. Maeda, T. Tadokoro, Y. Ueno, K. Nishida, Y. Kani, T. Sasaki, T. Watanabe, H. Kikunaga, S. Kashiwagi, K. Shirasaki, S. Sekimoto, T. Ohtsuki, M. Inagaki, S. Fukutani, Y. Shibahara, M. Yoshimoto, K. Ohnuki, H. Fujii
    • Organizer
      Annual Congress of the European Association of Nuclear Medicine, 2022
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] レーザーによる放射性核種内包フラーレンの生成に向けた基礎実験2022

    • Author(s)
      稲垣誠、秋山和彦、関本俊、大槻勤
    • Organizer
      日本放射化学会第66回討論会(2022)
    • Related Report
      2021 Annual Research Report
  • [Presentation] 福島原発事故に由来する不溶性微粒子の模擬生成2022

    • Author(s)
      稲垣誠、関本俊、高宮幸一、沖雄一、大槻勤
    • Organizer
      日本放射化学会第66回討論会(2022)
    • Related Report
      2021 Annual Research Report
  • [Presentation] Demonstration of Ac-225 production on the order of MBq using an electron linear accelerator2022

    • Author(s)
      T. Tadokoro, M. Maeda, T. Koiwai, K. Nishida, Y. Ueno, Y. Kani, T. Sasaki, T. Watanabe, H. Kikunaga, S. kashiwagi, S. Sekimoto, M. Inagaki, T. Ohtsuki
    • Organizer
      TAT12
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 福島原発事故に由来する不溶性放射性微粒子の模擬生成実験2022

    • Author(s)
      稲垣誠、関本俊、高宮幸一、沖雄一、大槻勤
    • Organizer
      第23回「環境放射能」研究会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 福島第一原子力発電所事故に由来する不溶性放射性微粒子の模擬生成実験2021

    • Author(s)
      稲垣誠、佐藤諒、関本俊、高宮幸一、沖雄一、大槻勤
    • Organizer
      第22回「環境放射能」研究会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 福島原発事故に由来する不溶性微粒子のレーザー加熱法による模擬生成実験2021

    • Author(s)
      稲垣誠、関本俊、高宮幸一、沖雄一、大槻勤
    • Organizer
      日本放射化学会第64回討論会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 福島原発事故により放出された放射性微粒子の模擬生成実験2020

    • Author(s)
      稲垣誠、佐藤諒、関本俊、高宮幸一、沖雄一、大槻勤
    • Organizer
      第21回「環境放射能」研究会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 235U(nth,f)における高エネルギー即発ガンマ線スペクトルの測定2020

    • Author(s)
      西尾 勝久、牧井 宏之、廣瀬 健太郎、Riccardo Orlandi、小川 達彦、大槻 勤、関本 俊、高宮 幸一、河野 俊彦
    • Organizer
      日本原子力学会 2020年春の年会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 電子線形加速器を利用したAc-225製造量の実験的検討 (1)天然バリウムを用いた予備試験2020

    • Author(s)
      田所 孝広、上野 雄一郎、可児 祐子、渡辺 敬仁、佐々木 貴裕、島田 真生子、菊永 英寿、柏木 茂、大槻 勤、関本 俊
    • Organizer
      日本原子力学会 2020年春の年会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 電子線形加速器を利用したAc-225製造量の実験的検討 (2)Ra-226を用いたAc-225の製造基礎試験内容の検討2020

    • Author(s)
      上野 雄一郎、田所 孝広、可児 祐子、渡辺 敬仁、佐々木 貴裕、島田 真生子、菊永 英寿、柏木 茂、大槻 勤、関本 俊
    • Organizer
      日本原子力学会 2020年春の年会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Generation and analysis of the radioactive particles emitted from the Fukushima nuclear accident2020

    • Author(s)
      M. Inagaki, R. Sato, S. Sekimoto, K. Takamiya, Y. Oki, T. Ohtsuki
    • Organizer
      Goldschmidt2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 福島原発事故に由来する放射性微粒子の分析および模擬生成実験2020

    • Author(s)
      稲垣誠、佐藤諒、関本俊、高宮幸一、沖雄一、大槻勤
    • Organizer
      日本放射化学会第64回討論会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 放射性エアロゾル模擬生成実験における対象核種の拡張2020

    • Author(s)
      竹内 佑、髙宮 幸一、稲垣 誠、関本 俊、沖 雄一、大槻 勤
    • Organizer
      日本放射化学会第64回討論会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 不溶性放射性微粒子の模擬生成実験2020

    • Author(s)
      稲垣誠、佐藤諒、関本俊、高宮幸一、沖雄一、大槻勤
    • Organizer
      「福島原発事故で放出された放射性物質の多面的分析」専門研究会(4)
    • Related Report
      2020 Annual Research Report
  • [Presentation] ワイヤスクリーンを用いた微小エアロゾル粒子の簡便粒径測定2019

    • Author(s)
      沖 雄一、高宮幸一、関本 俊、大槻 勤、長田直之
    • Organizer
      第20回環境放射能研究会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 幼果期と収穫期における果実および葉中Cs137 濃度の経時的推移2019

    • Author(s)
      佐藤守、桑名篤、南春菜、渡辺善仁、高田大輔、大野剛、菊永英寿、大槻勤
    • Organizer
      第20回環境放射能研究会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 照射ウランを用いた放射性エアロゾル生成模擬実験のための装置開発2019

    • Author(s)
      竹内裕弥、高宮幸一、関本俊、沖雄一、大槻勤
    • Organizer
      第20回環境放射能研究会
    • Related Report
      2018 Annual Research Report

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Published: 2018-04-23   Modified: 2024-01-30  

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