Reduction of U(VI) and some fission products in HNO3 media by galvanostatic electrolysis

M. Nogami, Y. Hirose, T. Arai, Y. Z. Wei, M. Kumagai

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6 Citations (Scopus)

Abstract

In order to investigate the applicability of the galvanostatic reduction of uranium(VI) to U(IV) in the electrolytic reduction and ion exchange (ERIX) Process, a novel aqueous reprocessing technique for spent mixed uranium and plutonium oxide (MOX) fuels for fast-breeder reactors (FBR), an improved electrolytic cell was developed and fundamental electrolytic properties were examined using U and some fission products (FPs) in HNO3 media. As the result of the electrolysis for a 200 cm3 solution of 0.5 M (M = mol/dm3) U(VI), 6 M HNO3, and 0.5 M N2H4, it was found that more than 99% of U(VI) was reduced to U(IV) before the shift to the side reaction when the initial constant current supplied was no higher than 10 A. It was also found that the reduction of U(VI) to U(IV) was achieved using the cell under coexistence with the FPs, e.g. noble metals, which are easily deposited by the electrolytic reduction.

Original languageEnglish
Pages (from-to)358-360
Number of pages3
JournalJournal of Alloys and Compounds
Volume451
Issue number1-2
DOIs
Publication statusPublished - 2008 Feb 28

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Keywords

  • ERIX process
  • Electrolytic reduction
  • Reprocessing
  • Uranium

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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