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Application of adavanced electron microscopy to elucidate Cs-rich microparticles released from Fukushima Daiichi

Research Project

Project/Area Number 16K12585
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Environmental dynamic analysis
Research InstitutionKyushu University

Principal Investigator

Utsunomiya Satoshi  九州大学, 理学研究院, 准教授 (40452792)

Co-Investigator(Kenkyū-buntansha) 大貫 敏彦  東京工業大学, 科学技術創成研究院, 教授 (20354904)
Project Period (FY) 2016-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywords福島第一 / セシウム / 透過型電子顕微鏡 / CsMP / 放射能 / 福島第一原発 / 高濃度放射性Cs含有微粒子 / ウラン / デブリ / 微粒子 / MCCI / 放射線 / 原子力エネルギー / 電子顕微鏡 / 環境分析
Outline of Final Research Achievements

We have determined the spatial distribution of the numbers and radioactive fraction (RF) of the CsMPs in surface soil, which is defined as the sum of the CsMP radioactivity (in Bq) divided by the total radioactivity (in Bq) of soil. The number and RF of CsMPs were determined to be 22.1-101 particles/g and 15.4-34.0%, 24.3-64.8 particles/g and 36.7-37.4%, and 0.869-8.00 particles/g and 27.6-80.2%, respectively. These distributions are consistent with the major plume trajectories of released radionuclides on March 14, 2011, in the late afternoon through to the late afternoon of March 15, 2011, indicating that the CsMPs formed only during this short period. It also indicates that Unit 3 is the most plausible source of the CsMPs at the beginning of the release based on an analysis of the sequence of release events. The quantitative map of the distribution of CsMPs provides an important understanding of CsMP dispersion dynamics and can be used to assess risks in inhabited regions

Academic Significance and Societal Importance of the Research Achievements

本研究の一連の成果では、福島第一原発から放出された高濃度放射性セシウム含有微粒子(CsMP)の内部構造を詳細に分析することによって、ウランを含むデブリの構成元素の存在状態とメルトダウン時の挙動を明らかにすることができました。また、簡易定量法を開発し、福島県内の土壌に適用して、CsMPの個数と放射能寄与率(RF)を示しました。原発付近では個数が多く低RF値で、水溶性セシウムの寄与が大きくなることや、プルームの軌跡との比較によって、CsMPの形成時期や、流れを推測することができました。これらの結果は、福島第一原発で起きたこと、その環境影響を正しく考察するうえで重要な知見となっています。

Report

(5 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (30 results)

All 2019 2018 2017 2016 Other

All Int'l Joint Research (8 results) Journal Article (9 results) (of which Int'l Joint Research: 9 results,  Peer Reviewed: 9 results,  Open Access: 3 results) Presentation (13 results) (of which Int'l Joint Research: 5 results,  Invited: 2 results)

  • [Int'l Joint Research] Stanford University(米国)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] University of Helsinki(フィンランド)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] University of Nantes(フランス)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] University of Nantes(フランス)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] Stanford University(米国)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] University of Manchester(英国)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] University of Nantes(フランス)

    • Related Report
      2016 Research-status Report
  • [Int'l Joint Research] Stanford University(米国)

    • Related Report
      2016 Research-status Report
  • [Journal Article] Dissolution of radioactive, cesium-rich microparticles released from the Fukushima Daiichi Nuclear Power Plant in simulated lung fluid, pure-water, and seawater2019

    • Author(s)
      Mizuki Suetake, Yuriko Nakano, Genki Furuki, Ryohei Ikehara, Tatsuki Komiya, Eitaro Kurihara, Kazuya Morooka, Shinya Yamasaki, Toshihiko Ohnuki, Kenji Horie, Mami Takehara, Gareth T.W. Law, William Bower, Ber, Grambow, Rodney C. Ewing, Satoshi Utsunomiya
    • Journal Title

      Chemosphere

      Volume: 233 Pages: 633-644

    • DOI

      10.1016/j.chemosphere.2019.05.248

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Formation of radioactive cesium microparticles originating from the Fukushima Daiichi Nuclear Power Plant accident: characteristics and perspectives2019

    • Author(s)
      Ohnuki Toshihiko、Satou Yukihiko、Utsunomiya Satoshi
    • Journal Title

      Journal of Nuclear Science and Technology

      Volume: 56 Issue: 9-10 Pages: 1-11

    • DOI

      10.1080/00223131.2019.1595767

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Metaschoepite Dissolution in Sediment Column Systems?Implications for Uranium Speciation and Transport2019

    • Author(s)
      Bower William R.、Morris Katherine、Livens Francis R.、Mosselmans J. Frederick W.、Fallon Connaugh M.、Fuller Adam J.、Natrajan Louise、Boothman Christopher、Lloyd Jonathan R.、Utsunomiya Satoshi、Grolimund Daniel、Ferreira Sanchez Dario、Jilbert Tom、Parker Julia、Neill Thomas S.、Law Gareth T. W.
    • Journal Title

      Environmental Science & Technology

      Volume: 53 Issue: 16 Pages: 9915-9925

    • DOI

      10.1021/acs.est.9b02292

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Uranium Dioxides and Debris Fragments Released to the Environment with Cesium-Rich Microparticles from the Fukushima Daiichi Nuclear Power Plant.2018

    • Author(s)
      Ochiai A, Imoto J, Suetake M, Komiya T, Furuki G, Ikehara R, Yamasaki S, Law GTW, Ohnuki T, Grambow B, Ewing RC, Utsunomiya S
    • Journal Title

      Environmental Science & Technology

      Volume: 52 Issue: 5 Pages: 2586-2594

    • DOI

      10.1021/acs.est.7b06309

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Novel Method of Quantifying Radioactive Cesium-Rich Microparticles (CsMPs) in the Environment from the Fukushima Daiichi Nuclear Power Plant2018

    • Author(s)
      Ikehara Ryohei、Suetake Mizuki、Komiya Tatsuki、Furuki Genki、Ochiai Asumi、Yamasaki Shinya、Bower William R.、Law Gareth T. W.、Ohnuki Toshihiko、Grambow Bernd、Ewing Rodney C.、Utsunomiya Satoshi
    • Journal Title

      Environmental Science & Technology

      Volume: 52 Issue: 11 Pages: 6390-6398

    • DOI

      10.1021/acs.est.7b06693

    • NAID

      120007134060

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Caesium fallout in Tokyo on 15th March, 2011 is dominated by highly radioactive, caesium-rich microparticles2017

    • Author(s)
      Imoto J, Furuki G, Ochiai A, Yamasaki S, Nanba K, Ohnuki T, Grambow B, Ewing R, Utsunomiya S
    • Journal Title

      Scientific Reports

      Volume: srp42118

    • Related Report
      2017 Research-status Report 2016 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Caesium-rich micro-particles: A window into the meltdown events at the Fukushima Daiichi Nuclear Power Plant2017

    • Author(s)
      Genki Furuki, Junpei Imoto, Asumi Ochiai, Shinya Yamasaki, Kenji Nanba, Toshihiko Ohnuki, Bernd Grambow, Rodney C. Ewing, Satoshi Utsunomiya,Kenji Kato
    • Journal Title

      Scientific Reports

      Volume: 7 Issue: 1 Pages: 42731-42731

    • DOI

      10.1038/srep42731

    • NAID

      120007135007

    • Related Report
      2017 Research-status Report 2016 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Effect of Temperature on K<sup>+</sup> and Mg<sup>2+</sup> Extracted Desorption of Cs from Vermiculitized Biotite2017

    • Author(s)
      Yin XZhang LOchiai AUtsunomiya STakahashi HOhnuki TTakeshita K
    • Journal Title

      Chemistry Letters

      Volume: 46 Issue: 9 Pages: 1350-1352

    • DOI

      10.1246/cl.170551

    • NAID

      130006067855

    • ISSN
      0366-7022, 1348-0715
    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Isotopic signature and nano-texture of cesium-rich micro-particles: Release of uranium and fission products from the Fukushima Daiichi Nuclear Power Plant2017

    • Author(s)
      Imoto Junpei、Ochiai Asumi、Furuki Genki、Suetake Mizuki、Ikehara Ryohei、Horie Kenji、Takehara Mami、Yamasaki Shinya、Nanba Kenji、Ohnuki Toshihiko、Law Gareth T. W.、Grambow Bernd、Ewing Rodney C.、Utsunomiya Satoshi
    • Journal Title

      Scientific Reports

      Volume: 7 Issue: 1 Pages: 5409-5409

    • DOI

      10.1038/s41598-017-05910-z

    • NAID

      120007128834

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 高濃度放射性セシウム含有微粒子の新規 定量法(QCP法)開発とその移行挙動の解明2019

    • Author(s)
      宇都宮 聡
    • Organizer
      鉱物科学会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 人形峠ウラン鉱山跡地における坑水自然浄化機構の解明2019

    • Author(s)
      川本 圭佑
    • Organizer
      鉱物科学会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Isotopic Signature and Nano-texture of Cesium-rich Micro-particles:Release of Uranium and Fission Products from the Fukushima Daiichi Nuclear Power Plant2017

    • Author(s)
      J. Imoto, A. Ochiai, G. Furuki, R. Ikehara, M. Suetake, K. Horie, M. Takehara, S. Yamasaki, K. Nanba, T. Ohnuki, G. T. W. Law, B. Grambow, R. C. Ewing, and S. Utsunomiya
    • Organizer
      Goldschmidt conference
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Nuclear Fuel Fragments Releasedfrom the Fukushima Daiichi Nuclear Power Plant2017

    • Author(s)
      Asumi Ochiai, Junpei Imoto, Genki Furuki, Ryohei Ikehara, Mizuki Suetake, Shinya Yamasaki, Kenji Nanba, Toshihiko Ohnuki, Bernd Grambow, Rodney C. Ewing, and Satoshi Utsunomiya
    • Organizer
      Goldschmidt Conference
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Migration of Cs-rich Microparticles Released from the Fukushima Daiichi Nuclear Power Plant in the Surface Environments of Fukushima2017

    • Author(s)
      G. Furuki, R. Ikehara, M. Suetake, A. Ochiai, J. Imoto S. Yamasaki, K. Nanba, T. Ohnuki, S. Utsunomiya
    • Organizer
      Goldschmidt conference
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 高濃度放射性セシウム含有微粒子 (Cesium-rich microparticle, CsMP)の 本質的解明に基づく炉内の情報と環境影響(1) セシウム含有微粒子の同位体特性とナノ組織 -福島第一原発からのウランと核分裂核種の放出-2017

    • Author(s)
      宇都宮聡 井元純平 、落合朝須美、古木元気、池原遼平、末武瑞樹 、 山崎信哉 、堀江憲治 、竹原真美 、大貫敏彦 、難波謙二 、Law Gareth 、Grambow Bernd 、Ewing Rodney
    • Organizer
      原子力学会
    • Related Report
      2017 Research-status Report
  • [Presentation] 高濃度放射性セシウム含有微粒子(Cesium-rich microparticle, CsMP)の本質的解明に基づく炉内の情報と環境影響 (4)福島表層土壌における 高濃度放射性セシウム含有微粒子の 放射能寄与率定量法開発2017

    • Author(s)
      池原 遼平1,古木 元気1,末武 瑞樹1,山崎 信哉2,難波 謙二3,大貫 敏彦4, Bernd Grambow 5,Gareth T.W. Law 6,Rodney C. Ewing7,宇都宮 聡1
    • Organizer
      原子力学会
    • Related Report
      2017 Research-status Report
  • [Presentation] Cesium-rich micro-particles: A window into the meltdown events at the Fukushima Daiichi Nuclear Power Plant2017

    • Author(s)
      Satoshi Utsunomiya
    • Organizer
      American Chemical Society
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 福島表層環境に存在する高濃度セシウム含有微粒子のナノスケール解析と その移行挙動2016

    • Author(s)
      古木元気、井元純平、落合朝須美、山崎信也、難波謙二、大貫敏彦、Bernd Grambow, Rodney C. Ewing, 宇都宮聡
    • Organizer
      地球化学会
    • Place of Presentation
      大阪市立大学
    • Year and Date
      2016-09-14
    • Related Report
      2016 Research-status Report
  • [Presentation] 島第一原発から放出された高濃度放射性セシウム 含有粒子の存在状態と粒子形成2016

    • Author(s)
      井元純平1,古木元気1,落合朝須美1,山崎信哉2,難波謙二3,大貫敏彦4,Bernd Grambow5,Rodney C. Ewing6,宇都宮聡1
    • Organizer
      地球化学会
    • Place of Presentation
      大阪市立大学
    • Year and Date
      2016-09-14
    • Related Report
      2016 Research-status Report
  • [Presentation] 福島表層環境に存在する高濃度セシウム含有微粒子の原子スケール特性と その環境動態2016

    • Author(s)
      古木 元気1, 井元 純平1, 宇都宮 聡1, 落合 朝須美1, 大貫 敏彦2
    • Organizer
      原子力学会
    • Place of Presentation
      久留米シティープラザ
    • Year and Date
      2016-09-07
    • Related Report
      2016 Research-status Report
  • [Presentation] 福島第一原発から放出された高濃度放射性セシウム含有粒子の生成過程2016

    • Author(s)
      *井元 純平1,古木 元気1,落合 朝須美1,大貫 敏彦2,宇都宮 聡1
    • Organizer
      原子力学会
    • Place of Presentation
      久留米シティープラザ
    • Year and Date
      2016-09-07
    • Related Report
      2016 Research-status Report
  • [Presentation] Plenary: Challenging Radionuclides in Environment at the Atomic Scale: Issues in Waste Disposal and Fukushima2016

    • Author(s)
      宇都宮 聡
    • Organizer
      Goldschmidt Conference
    • Place of Presentation
      パシフィコ横浜
    • Year and Date
      2016-06-26
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited

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Published: 2016-04-21   Modified: 2022-02-22  

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