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An Application of the Photochemistry of Uranyl Ion to Nuclear Fuel Reprocessing

Research Project

Project/Area Number 62580174
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field Nuclear engineering
Research InstitutionUniversity of Tokyo

Principal Investigator

KATSUMURA Yosuke  Department of Nuclear Engineering, Faculty of Engineering, University of Yokyo, 工学部原子力工学科, 助教授 (70111466)

Co-Investigator(Kenkyū-buntansha) HIROISHI Daisuke  Department of Nuclear Engineering, Faculty of Engineering, University of Yokyo, 工学部原子力工学科, 助手 (20199110)
SHIRAISHI Hirotsugu  Department of Nuclear Engineering, Faculty of Engineering, University of Yokyo, 工学部原子力工学科, 助手 (50011200)
ISHIGURE Kenkichi  Department of Nuclear Engineering, Faculty of Engineering, University of Yokyo, 工学部原子力工学科, 教授 (90010975)
Project Period (FY) 1987 – 1988
Project Status Completed (Fiscal Year 1988)
Budget Amount *help
¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 1988: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1987: ¥1,200,000 (Direct Cost: ¥1,200,000)
KeywordsUranyl ion / Photoreduction / Quantum yield / Nitric acid / Nitrous acid / 不均化反応 / 消光
Research Abstract

Photochemical reactions of uranyl ion (UO_2^<2+>) in nitric acid have been investigated from a point of applications to a spent nuclear fuel reprocessing.
Quantum yields of fluorescence from excited uranyl ion in nitric acid were determined by comparing with the photoemission of quinine in sulfuric acid taken as a refernce. It was found that the yields is an order of 10^<-3> and concentration dependence of nitric acid was measured. The emission is strongly affected by the presence of additives and quenching parameters for some additives were determined. The evaluated values were consistent with reported. Further, a simple method is proposed to evaluate the absolute concentration of uranyl ion from the quenching measurements in the presence of quenchers as impuruties.
Quantum yield of photoreduction of uranyl ion to uranous ion (U^<4+>) by ethanol in nitric acid was determined. On the basis of the concentration dependence of nitric acid and ethanol, and effects of oxygen, and concomitant ions of [H^+] and [NO^<3->], mechanism of the photochemical reactions was derived. Finally, it is concluded that photoreduction of uranyl ion by ethanol could be used for developing new techniques of the nuclear fuel reprocessing.

Report

(3 results)
  • 1988 Annual Research Report   Final Research Report Summary
  • 1987 Annual Research Report
  • Research Products

    (3 results)

All Other

All Publications (3 results)

  • [Publications] Y.Katsumura,;H.Abe.;T.Yotsuyanagi.;K.Ishigure.: Submitted for Journal of Photochemisty.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Y. Katsumura;H. Abe; T. Yostuyanagi; K. Ishigure: "Photochemical Reactions of Uranyl Ion in Nitric Acid - Quantum Yields of Photoemission and Photoreduction by Ethanol" submitted for Journal of Photochemistry.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Y.Katumura,;H.Abe,;T.Yotsuyanagi,;K.Ishigure.: submitted for Journal of Photochemistry.

    • Related Report
      1988 Annual Research Report

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Published: 1987-04-01   Modified: 2016-04-21  

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