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2016 Fiscal Year Annual Research Report

Establishment of a novel/simple measurement procedure of environmental radiation and a long-time monitoring of radiocesium dynamics using the proedure

Research Project

Project/Area Number 15H04621
Research InstitutionCentral Research Institute of Electric Power Industry

Principal Investigator

吉原 利一  一般財団法人電力中央研究所, 環境科学研究所, 上席研究員 (60371506)

Co-Investigator(Kenkyū-buntansha) Konoplev Aleksei  福島大学, 学内共同利用施設等, 教授 (00745581)
吉田 博久  首都大学東京, 都市環境科学研究科, 教授 (20094287)
藤巻 秀  国立研究開発法人量子科学技術研究開発機構, 本部 経営企画部, 上席研究員(定常) (20354962)
Yoschenko Vasyl  福島大学, 学内共同利用施設等, 特任教授 (40745569)
河地 有木  国立研究開発法人量子科学技術研究開発機構, 高崎量子応用研究所 放射線生物応用研究部, 上席研究員(定常) (70414521)
橋田 慎之介  一般財団法人電力中央研究所, 環境科学研究所, 主任研究員 (60516649)
小林 卓也  一般財団法人電力中央研究所, 環境科学研究所, 上席研究員 (60371530)
Project Period (FY) 2015-04-01 – 2019-03-31
Keywords放射性Cs / 積算線量計 / 環境放射能 / 樹木 / 土壌 / 簡易計測
Outline of Annual Research Achievements

本研究の目的である「特定の環境要素に蓄積した放射性Cs からのガンマ線量を周辺環境からのBG 線量と識別して精度良く簡易に測定する手法を確立すること、および環境中の放射性Cs の動態解明とモデル化・移行予測を行うこと」に対し、2016年度は2015年度にやや遅れていた計画を立て直し、ほぼ計画通りに個人用積算線量計(D-シャトル)を用いた新規モニタリング手法の確立、およびモニタリング・実験とその結果解析を進めた。特に、新規手法を用いた測定(モニタリング)については、測定地点を増やし、昨年度から引き続き測定を実施した①電中研我孫子事業所構内、②福島県川俣町に加えて、③同浪江町、④同新田川河川敷、などにおいて実施した。その結果、昨年度に明らかにした知見である「スギ樹体放射能の変化が内樹皮における季節変動と同調していること」や、「多量の降雨により土壌の移動が生じ、空間線量率の変化に大きな影響を及ぼすこと」などに関して再現性がとれたほか、スギ内樹皮における放射能の変化がカリウムの変動と同調している可能性を示すことができた。また、これらを補完するため、従来手法(サンプリングとゲルマニウム半導体型スペクトロメータによる測定)を用いたモニタリングも行った。その結果、サクラの越年芽形成から落葉までの葉寿命全体におけるカリウム濃度の変動と放射性Cs濃度の変動の同調性などが明らかとなった。これらの得られた結果は、JER誌などへの学術誌への投稿の他、土壌肥料学会、KEK環境放射能研究会などの国内外での学会において公表した。なお、2015年度に投稿した論文は2016年度に全て受理・公刊された。さらに2016年6月(電中研)と2017年2月(首都大)の2回、進捗報告会を行い、各分担における課題や解析の結果などの討論を通じて共同研究者間での情報の共有を図るとともに相互の理解を深めた。

Current Status of Research Progress
Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

ほぼ順調
昨年度やや遅延となっていた新規モニタリング手法の確立について、樹体内での空間分布の線量測定値への影響に関する実験を実施し、測定手法のマニュアル化を進めた。また、その他モニタリングについても昨年度一部の測定において計測器が流されるなどしたことに対する対応策を施し、不備が生じていたデータを補完することが出来た。

Strategy for Future Research Activity

引き続き計画通りに実験・観測を進め、再現性を取ると共に、様々な状況に応じたデータを積み重ね、手法の一般化と信頼性の向上を図る。また、積極的な外部への情報発信に努める。

  • Research Products

    (30 results)

All 2017 2016

All Journal Article (15 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 15 results,  Acknowledgement Compliant: 12 results,  Open Access: 1 results) Presentation (15 results) (of which Int'l Joint Research: 11 results,  Invited: 1 results)

  • [Journal Article] Measurement of environmental radioactivity using a cumulative gamma radiation dosimeter: A challenge in detecting regional characteristics of landscapes.2017

    • Author(s)
      Yoshihara, T., Kominato A., Nagao, Y., Kawachi, N., Hashida S-N., Suzui N., Yin Y.-G., Fujimaki S.
    • Journal Title

      Proc. ICRCP2016, Sevilla, Spain.

      Volume: 印刷中 Pages: 印刷中

    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Radiocesium distribution and fluxes in the typical Cryptomeria japonica forest at the late stage after the accident at Fukushima Dai-Ichi Nuclear Power Plant.2017

    • Author(s)
      Vasyl Yoschenko, Tsugiko Takase, Alexei Konoplev, Kenji Nanba, Yuichi Onda, Sergiy Kivva, Mark Zheleznyak, Natsumi Sato, Koji Keitoku.
    • Journal Title

      J. Env. Radioactivity

      Volume: 166 Pages: 45-55

    • DOI

      http://dx.doi.org/10.1016/j.jenvrad.2016.02.017

    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Radioactive contaminated forests in Fukushima and Chernobyl.2017

    • Author(s)
      Vasyl Yoschenko, Tatsuhiro Ohkubo, Valery Kashparov.
    • Journal Title

      Journal of Forest Research

      Volume: 印刷中 Pages: 印刷中

    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Radioactive and stable cesium isotopes in Fukushima forests.2017

    • Author(s)
      V. Yoschenko, T. Takase, K. Nanba, Y. Onda, A. Konoplev.
    • Journal Title

      Proc. ICRCP2016, Sevilla, Spain.

      Volume: 印刷中 Pages: 印刷中

    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Behavior of 137Cs in ponds in the vicinity of the Fukushima Dai-ichi Nuclear Power Plant.2017

    • Author(s)
      Wakiyama Y., Konoplev A., Wada T., Takase T., Nanba K., Byrnes I., Carradine M.
    • Journal Title

      J. Environ. Radioact.

      Volume: 印刷中 Pages: 印刷中

    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Disparate radiocesium leaching from two woody species by acceleration of litter decomposition using microbial inoculation.2016

    • Author(s)
      Hashida S-N., Yoshihara, T.
    • Journal Title

      J. Env. Radioactivity

      Volume: 162-163 Pages: 319-327

    • DOI

      https://doi.org/10.1016/j.jenvrad.2016.06.010

    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Radiocesium contamination in living and dead foliar parts of Japanese cedar during 2011-2015.2016

    • Author(s)
      Yoshihara, T., Matsumura, H., Hashida S-N., Nakaya, K.
    • Journal Title

      J. Env. Radioactivity

      Volume: 164 Pages: 291-299

    • DOI

      https://doi.org/10.1016/j.jenvrad.2016.08.010

    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Measurement of environmental radioactivity using a cumulative gamma radiation dosimeter: Fertilization-induced changes in young fruit trees.2016

    • Author(s)
      Yoshihara, T., Kominato A., Nagao, Y., Kawachi, N., Hashida S-N., Suzui N., Yin Y.-G., Fujimaki S.
    • Journal Title

      Proc. ENVIRA2015, New challenges with new analytical technologies. (Eds. Ioannidou, A. & Povinec, P.P.)

      Volume: - Pages: 134-137

    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Monitoring of seasonal variations in radiocesium from the Fukushima accident in litterfall of four broad-leaf tree species and its correlation with variation in potassium.2016

    • Author(s)
      Yoshihara, T., Matsumura, H., Hashida S-N.
    • Journal Title

      Research & Reviews: Journal of Botanical Sciences

      Volume: 5 Pages: 6-14

    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] A fate of radiocesium fallout deposited on Japanese cedar between 2011 and 2015.2016

    • Author(s)
      Yoshihara, T., Matsumura, H., Hashida S-N.
    • Journal Title

      Proc. 17th workshop Environ. Radioact. (Eds. Bessho, K, Tagami, K., Takamiya, K., Matsumura, H., & Miura, T.) 8-10 Mar. 2016, KEK, Tsukuba, Japan

      Volume: - Pages: 89-94

    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] ポケット線量計を用いて樹体内の放射性物質濃度を測定する試み2016

    • Author(s)
      櫻井哲史、小川秀樹、吉田博久
    • Journal Title

      Proceedings of the 17th Workshop on Environmental Radioactivity, KEK Proceedings

      Volume: - Pages: 213-218

    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Fukushima and Chernobyl: similarities and differences in radiocesium behavior.2016

    • Author(s)
      Konoplev A.
    • Journal Title

      In: Radioactivity after nuclear explosions and accidents: consequences and countermeasures.

      Volume: - Pages: 202-218

    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Vertical distribution of radiocesium in soils of the area affected by the Fukushima Dai-ichi nuclear power plant accident.2016

    • Author(s)
      Konoplev A.V., Golosov V.N., Yoschenko V.I., Nanba K., Onda Y., Takase T., Wakiyama Y.
    • Journal Title

      Eurasian Soil Science,

      Volume: 49 (5) Pages: 570-580

    • DOI

      DOI:10.134/S106422931605

    • Peer Reviewed
  • [Journal Article] Comparative analysis of radiocesium wash-off from contaminated watersheds as a result of the accidents at Fukushima Dai-ichi and Chernobyl NPPs.2016

    • Author(s)
      Konoplev A.
    • Journal Title

      Geochemistry International

      Volume: 54 (6) Pages: 522-528

    • Peer Reviewed
  • [Journal Article] Radiocesium solid-liquid distribution and migration in contaminated areas after the accident at Fukushima Dai-ichi nuclear plant. In: New Challenges with New Analytical Techniques.2016

    • Author(s)
      Konoplev A., Golosov V., Nanba K., Omine K., Onda Y., Takase T., Wada T., Wakiyama Y., Yoschenko V., Zheleznyak M., Kivva S.
    • Journal Title

      Proceedings of International Conference on Environmental Radioactivity ENVIRA 2015, Thessaloniki, 21-29 September (Ed. A. Ioannidou, P. Povinec)

      Volume: - Pages: 54-58

    • Peer Reviewed
  • [Presentation] 櫻井哲史、小川秀樹、吉田博久2017

    • Author(s)
      スギ樹幹内におけるCs濃度の季節変化-ポケット線量計を用いた測定の試み-
    • Organizer
      第18回環境放射能研究会2017年3月(つくば)
    • Place of Presentation
      KEK, つくば
    • Year and Date
      2017-03-14 – 2017-03-16
  • [Presentation] Measurement of environmental radioactivity using a cumulative gamma radiation dosimeter: A challenge in detecting regional characteristics of landscapes.2016

    • Author(s)
      Yoshihara, T., Kominato A., Nagao, Y., Kawachi, N., Hashida S-N., Suzui N., Yin Y.-G., Fujimaki S.
    • Organizer
      II INTERNATIONAL CONFERENCE ON RADIOECOLOGICAL CONCENTRATION PROCESSES
    • Place of Presentation
      Sevilla, Spain.
    • Year and Date
      2016-11-06 – 2016-11-09
    • Int'l Joint Research
  • [Presentation] RADIOACTIVE AND STABLE CESIUM ISOTOPES IN FUKUSHIMA FORESTS.2016

    • Author(s)
      Vasyl Yoschenko, Tsugiko Takase, Kenji Nanba, Yuichi Onda, Alexei Konoplev
    • Organizer
      II INTERNATIONAL CONFERENCE ON RADIOECOLOGICAL CONCENTRATION PROCESSES
    • Place of Presentation
      Sevilla, Spain.
    • Year and Date
      2016-11-06 – 2016-11-09
    • Int'l Joint Research
  • [Presentation] Development of a Simple Method to Measure Environmental Radioactivity in a Forest by Using Personal Dosimeters2016

    • Author(s)
      Kurita K, Yamaguchi M, Nagao Y, Suzui N, Yin Y-G, Yoshihara T, Kawachi N.
    • Organizer
      II INTERNATIONAL CONFERENCE ON RADIOECOLOGICAL CONCENTRATION PROCESSES
    • Place of Presentation
      Sevilla, Spain.
    • Year and Date
      2016-11-06 – 2016-11-09
    • Int'l Joint Research
  • [Presentation] Heterogeneity of radiocesium contamination in woods2016

    • Author(s)
      Satoshi Sakurai, Hirohisa Yoshida
    • Organizer
      IUFRO Regional Congress for Asia and Oceania 2016 (IUFRO-AO2016)
    • Place of Presentation
      Beijing, China
    • Year and Date
      2016-10-24 – 2016-10-27
    • Int'l Joint Research
  • [Presentation] スギの葉令と葉におけるK濃度、および福島事故由来の放射性Cs濃度について2016

    • Author(s)
      吉原利一、松村秀幸、橋田慎之介
    • Organizer
      日本土壌肥料学会2016年度佐賀大会
    • Place of Presentation
      佐賀大
    • Year and Date
      2016-09-20 – 2016-09-22
  • [Presentation] 半導体型積算線量計(D-シャトル)を用いた非侵襲的測定手法の開発 ―リンゴとモモの苗木における放射性セシウムの季節変動測定の試み―2016

    • Author(s)
      小湊あかり、吉原利一、島田浩章
    • Organizer
      日本土壌肥料学会2016年度佐賀大会
    • Place of Presentation
      佐賀大
    • Year and Date
      2016-09-20 – 2016-09-22
  • [Presentation] 簡易型個人線量計を用いた樹体内放射能モニタリング手法の開発2016

    • Author(s)
      栗田圭輔、山口充孝、長尾悠人、鈴井伸郎、尹永根、吉原利一、河地有木
    • Organizer
      日本土壌肥料学会2016年度佐賀大会
    • Place of Presentation
      佐賀大
    • Year and Date
      2016-09-20 – 2016-09-22
  • [Presentation] Radiocaesium in Fukushima Forests: Dynamics and Impacts.2016

    • Author(s)
      Vasyl Yoschenko, Kenji Nanba, Tsugiko Takase, Yuichi Onda, Alexei Konoplev, Natsumi Sato, Koji Keitoku
    • Organizer
      SPERA-2016
    • Place of Presentation
      Bali, Indonesia
    • Year and Date
      2016-09-05 – 2016-09-09
    • Int'l Joint Research
  • [Presentation] Behavior of Fukushima, Chernobyl and Mayak-derived radiocesium in the environment: similarities and differences.2016

    • Author(s)
      Konoplev A.
    • Organizer
      South Pacific Environmental Radioactivity Association International Conference
    • Place of Presentation
      Bali
    • Year and Date
      2016-09-05 – 2016-09-09
    • Int'l Joint Research
  • [Presentation] Radiocesium distributions and dynamics in the Fukushima forest ecosystems.2016

    • Author(s)
      VASYL YOSCHENKO, ALEXEI KONOPLEV, TSUGIKO TAKASE, KENJI NANBA, YUICHI ONDA,MARK ZHELEZNYAK, SERGII KIVVA
    • Organizer
      Goldschmidt 2016
    • Place of Presentation
      Yokohama, Japan
    • Year and Date
      2016-06-26 – 2016-07-01
    • Int'l Joint Research
  • [Presentation] Evolution of Radiation Situation in the Fukushima Zone During the Post-accidental Period and Prognosis for the Future.2016

    • Author(s)
      Kenji Nanba, Vasyl Yoschenko, Mark Zheleznyak.
    • Organizer
      INUDECO'16
    • Place of Presentation
      Slavutych, Ukraine
    • Year and Date
      2016-04-25 – 2016-04-27
    • Int'l Joint Research / Invited
  • [Presentation] Study of the radiocesium dynamics in the Fukushima forest ecosystems.2016

    • Author(s)
      Vasyl Yoschenko, Alexei Konoplev, Tsugiko Takase, Kenji Nanba, Yuichi Onda, Mark Zheleznyak, and Sergii Kivva
    • Organizer
      EGU General Assembly 2016
    • Place of Presentation
      Vienna, Austria
    • Year and Date
      2016-04-17 – 2016-04-22
    • Int'l Joint Research
  • [Presentation] Differences and similarities between behavior of Fukushima-derived and Chernobyl-derived radiocesium in the environment.2016

    • Author(s)
      Konoplev A.
    • Organizer
      European Geoscience Union General Assembly 2016
    • Place of Presentation
      Vienna
    • Year and Date
      2016-04-17 – 2016-04-22
    • Int'l Joint Research
  • [Presentation] Radiocesium behaviour in ponds of the close proximity to the Fukushima Dai-ichi nuclear power plant.2016

    • Author(s)
      Konoplev A.
    • Organizer
      1st International Conference on radioanalytical and Nuclear Chemistry
    • Place of Presentation
      Budapest
    • Year and Date
      2016-04-10 – 2016-04-15
    • Int'l Joint Research

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Published: 2018-01-16  

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