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Reduction of Pu(IV) by carbohydrazide in aqueous solutions and in two-phase systems with tributyl phosphate

  • V. N. Alekseenko
  • K. N. Dvoeglazov
  • V. I. Marchenko
  • S. N. Alekseenko
  • V. I. Volk
  • L. N. Podrezova
Article

Abstract

The possibility of using carbohydrazide as a reducing agent for plutonium in Purex process was examined. Kinetics of the reaction between Pu(IV) and carbohydrazide in HNO3 aqueous solution was studied spectrophotometrically, the rate law was established, and the rate constant and activation energy values were calculated. Plutonium stripping efficiency by carbohydrazide as defined is higher in the two-phase system: 30 % TBP with Pu(IV) nitric acid aqueous solution, in the presence of glycine. A laboratory scale counter-current experiment performed with the use of simulated WWER-1000 SNF reprocessing solutions demonstrated the possibility of carbohydrazide–glycine mixture using for plutonium concentrating back-extraction process.

Keywords

Plutonium Carbohydrazide Nitric acid Reduction Kinetics Glycine Tributyl phosphate Back-extraction 

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2015

Authors and Affiliations

  • V. N. Alekseenko
    • 1
  • K. N. Dvoeglazov
    • 2
  • V. I. Marchenko
    • 2
  • S. N. Alekseenko
    • 3
  • V. I. Volk
    • 2
  • L. N. Podrezova
    • 2
  1. 1.OJSC “Federal Centre for Nuclear and Radiation Safety”MoscowRussia
  2. 2.OJSC “A.A. Bochvar High-technology Research Institute of Inorganic Materials”MoscowRussia
  3. 3.Federal State Unitary Enterprise “Mining and Chemical Combine”ZheleznogorskRussia

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