Title: Electrochemistry of uranium in molten LiF-CaF2
Authors: NOURRY ChristopheSOUCEK PavelMASSOT L.MALMBECK RikardCHAMELOT PGLATZ Jean-Paul
Citation: JOURNAL OF NUCLEAR MATERIALS vol. 430 p. 58-63
Publisher: ELSEVIER SCIENCE BV
Publication Year: 2012
JRC N°: JRC67837
ISSN: 0022-3115
URI: http://www.sciencedirect.com/science/article/pii/S0022311512003340
http://publications.jrc.ec.europa.eu/repository/handle/JRC67837
DOI: 10.1016/j.jnucmat.2012.06.028
Type: Articles in periodicals and books
Abstract: This article is focused on the electrochemical behaviour of U ions in molten LiF-CaF2 (79-21 wt.%) eutectic. On a W electrode, U(III) is reduced in one step to U metal and U(III) can be also oxidised to U(IV). Both systems were studied by cyclic and square wave voltammetry. Reversibility of both systems for both techniques was verified and number of exchanged electrons was determined, as well as diffusion coefficients for U(III) and U(IV). The results are in a good agreement with previous studies. On a Ni electrode, the depolarisation effect due to intermetallic compounds formation was observed. Electrorefining of U metal in a melt containing U and Gd ions was carried out using a reactive Ni electrode with promising results.
JRC Directorate:Nuclear Safety and Security

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