• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Hierarchical structure and its dynamics: self-assembly of extracted coordination species in a spent fuel reprocessing process

Research Project

Project/Area Number 26289368
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypePartial Multi-year Fund
Section一般
Research Field Nuclear engineering
Research InstitutionJapan Atomic Energy Agency

Principal Investigator

Motokawa Ryuhei  国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門 物質科学研究センター, 研究主幹 (50414579)

Co-Investigator(Kenkyū-buntansha) 遠藤 仁  大学共同利用機関法人高エネルギー加速器研究機構, 物質構造科学研究所, 准教授 (40447313)
Research Collaborator HELLER T. William  
Project Period (FY) 2014-04-01 – 2018-03-31
Project Status Completed (Fiscal Year 2017)
Budget Amount *help
¥16,120,000 (Direct Cost: ¥12,400,000、Indirect Cost: ¥3,720,000)
Fiscal Year 2017: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2016: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2015: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2014: ¥8,060,000 (Direct Cost: ¥6,200,000、Indirect Cost: ¥1,860,000)
Keywords抽出錯体 / PUREX / 中性子小角散乱 / X線小角散乱 / 階層構造 / EXAFS / 相分離 / 再処理 / 抽出 / 第三相 / バックエンド / 溶媒抽出 / 凝集 / 中性子小角散乱法
Outline of Final Research Achievements

We investigated a microscopic structure of the organic phase containing the extracted coordination species of zirconium/tri-n-butyl phosphate (TBP) through extended X-ray absorption fine structure, small-angle neutron scattering, and molecular dynamics simulations. As a result, it is found that the coordination species aggregate due to a hydrogen-bonding network formed by interaction between the hydrophilic part of the coordination species with extracted water and nitric acid molecules. This reduces the hydrophilic surface area, resulting in subsequent formation of small primal clusters of 2 -3 nm in diameter. The primal clusters further aggregate due to van der Waals interaction to form large aggregates.

Report

(5 results)
  • 2017 Annual Research Report   Final Research Report ( PDF )
  • 2016 Annual Research Report
  • 2015 Annual Research Report
  • 2014 Annual Research Report

Research Products

(18 results)

All 2018 2017 2016 2015 2014 Other

All Int'l Joint Research (5 results) Journal Article (7 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 7 results,  Acknowledgement Compliant: 6 results,  Open Access: 1 results) Presentation (6 results) (of which Int'l Joint Research: 3 results,  Invited: 2 results)

  • [Int'l Joint Research] マンチェスター大学(英国)

    • Related Report
      2017 Annual Research Report
  • [Int'l Joint Research] オークリッジ国立研究所/国立標準技術研究所(米国)

    • Related Report
      2016 Annual Research Report
  • [Int'l Joint Research] マンチェスター大学(英国)

    • Related Report
      2016 Annual Research Report
  • [Int'l Joint Research] オークリッジ国立研究所(ORNL)/国立標準技術研究所(NIST)(米国)

    • Related Report
      2015 Annual Research Report
  • [Int'l Joint Research] マンチェスター大学(英国)

    • Related Report
      2015 Annual Research Report
  • [Journal Article] A Novel Microemulsion Phase Transition: Toward the Elucidation of Third-Phase Formation in Spent Nuclear Fuel Reprocessing2018

    • Author(s)
      Junju Mu, Ryuhei Motokawa, Kazuhiro Akutsu,Shotaro Nishitsuji, and Andrew J. Masters
    • Journal Title

      The Journal of Physical Chemistry B

      Volume: 122 Pages: 1439-1452

    • DOI

      10.1021/acs.jpcb.7b08515

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Recent Research in Solvent Extraction of Platinum Group Metals2017

    • Author(s)
      成田 弘一、鈴木 智也、元川 竜平
    • Journal Title

      J. Japan Inst. Metals

      Volume: 81 Issue: 4 Pages: 157-167

    • DOI

      10.2320/jinstmet.je201604

      10.2320/jinstmet.JE201604

    • NAID

      130007334874

    • ISSN
      0021-4876, 1880-6880, 2433-7501
    • Related Report
      2017 Annual Research Report 2016 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Small-angle Neutron Scattering Study of Specific Interaction and Coordination Structure Formed by Mono-acetyl Substituted Dibenzo-20-crown-6-ether and Cesium Ions2016

    • Author(s)
      Ryuhei Motokawa, Tohru Kobayashi, Hitoshi Endo, Takashi Ikeda, Tsuyoshi Yaita, Shinichi Suzuki, Hirokazu Narita, Kazuhiro Akutsu, and William T. Heller
    • Journal Title

      J. Nucl. Sci. Technol.

      Volume: 53 Pages: 1205-1211

    • DOI

      10.1080/00223131.2015.1102100

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] A Comparative Molecular Dynamic Study on Tri-n-butyl phosphate in Organic and Aqueous Environments and Its Relevance to Nuclear Extraction Processes2016

    • Author(s)
      Junju Mu , Ryuhei Motokawa, Christopher D. Williams, Akutsu Kazuhiro, Shotaro Nishitsuji, and Andrew J. Masters
    • Journal Title

      J. Phys. Chem. B

      Volume: 120 Pages: 5183-5193

    • DOI

      10.1021/acs.jpcb.6b00781

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Neutron Polarization Analysis for Biphasic Solvent Extraction System2016

    • Author(s)
      Ryuhei Motokawa, Hitoshi Endo, Michihiro Nagao, and William T. Heller
    • Journal Title

      Solvent Extr. Ion Exch.

      Volume: 34 Pages: 399-406

    • DOI

      10.1080/07366299.2016.1201980

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Mesoscopic Structures of Vermiculite and Weathered Biotite Clays in Suspension with and without Cesium Ions2014

    • Author(s)
      Ryuhei Motokawa, Hitoshi Endo, Shingo Yokoyama, Hiroki Ogawa, Tohru Kobayashi, Shinichi Suzuki, Tsuyoshi Yaita
    • Journal Title

      Langmuir

      Volume: 30 Pages: 15127-15134

    • DOI

      10.1021/la503992p

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Collective Structural Changes in Vermiculite Clay Suspensions Induced by Cesium Ions2014

    • Author(s)
      Ryuhei Motokawa, Hitoshi Endo, Shingo Yokoyama, Shotaro Nishitsuji, Tohru Kobayashi, Shinichi Suzuki, Tsuyoshi Yaita
    • Journal Title

      Scientific Reports

      Volume: 4

    • DOI

      10.1038/srep06585

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Presentation] Third Phase Formation Induced by a Growth of Hierarchical Aggregation Structure in Biphasic Solvent Extraction Systems2017

    • Author(s)
      Ryuhei Motokawa
    • Organizer
      Actinides 2017
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Neutron Polarization Analysis for Biphasic Solvent Extraction Systems2017

    • Author(s)
      Ryuhei Motokawa
    • Organizer
      ISEC 2017
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 有機相中でつくられる凝集体の中性子小角散乱法による観察2016

    • Author(s)
      元川竜平
    • Organizer
      第35回溶媒抽出討論会
    • Place of Presentation
      産業技術総合研究所つくばセンター(茨城県つくば市)
    • Year and Date
      2016-11-28
    • Related Report
      2016 Annual Research Report
  • [Presentation] SANS and EXAFS Studies of Hierarchical Structure Assembled by Coordination Species in Biphasic Solvent Extraction2015

    • Author(s)
      Ryuhei Motokawa
    • Organizer
      Pacifichem 2015
    • Place of Presentation
      ホノルル(アメリカ合衆国)
    • Year and Date
      2015-12-15
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 抽出錯体溶液が自発的につくる階層構造2014

    • Author(s)
      元川竜平
    • Organizer
      第33回溶媒抽出討論会
    • Place of Presentation
      神戸
    • Year and Date
      2014-12-11 – 2014-12-12
    • Related Report
      2014 Annual Research Report
  • [Presentation] Hierarchical Structure Assembled by Coordination Species in Biphasic Solvent Extraction2014

    • Author(s)
      Ryuhei Motokawa
    • Organizer
      Actinide XAS 2014
    • Place of Presentation
      Schloss Bottstein, Switzerland
    • Year and Date
      2014-05-20 – 2014-05-22
    • Related Report
      2014 Annual Research Report
    • Invited

URL: 

Published: 2014-04-04   Modified: 2019-03-29  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi