Actinide, lanthanide, and fission product speciation and electrochemistry in ionic melts / Bhatt A.I., Kinoshita H., Koster A.L., May I., Sharrad C., Steele H.M., Volkovich V.A., Fox O.D., Jones C.J., Lewin B.G., Charnock J.M., Hennig C. // ACS Symposium Series. - 2006. - V. 933, l. . - P. 219-231.

ISSN:
00976156
Type:
Conference Paper
Abstract:
We report the results of recent research that we have undertaken to increase our understanding of key actinide and fission product speciation in a range of ionic melts. These results will be used to develop novel electrochemical methods of separation of uranium and plutonium from irradiated nuclear fuel. Our studies in high temperature alkali metal melts (including LiCl and the eutectics LiCl-KCl and CsCl-NaCl) have focussed on in-situ speciation of U, Tc and Ru using both Electronic Absorption Spectroscopy (EAS) and X-ray Absorption Spectroscopy (XAS). The XAS studies have included Extended X-Ray Absorption Fine Structure (EXAFS) and X-Ray Absorption Near Edge Structure (XANES) measurements. We report what could be unusual uranium speciation in high temperature melts and evaluate the likelihood of Ru or Tc volatilisation during plant operation. Our studies in lower temperature melts, commonly known as ionic liquids, have focussed on salts containing tertiary alkyl group 15 cations and the bis(trifluoromethylsulphonyl)imide anion, melts which we know to have exceptionally wide electrochemical windows. We report Ln, Th, U and Np speciation (XAS, EAS and vibrational spectroscopy) and electrochemistry in these melts. © 2006 American Chemical Society.
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Affiliations Centre for Radiochemistry Research, Department of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom; Department of Rare Metals, Ural State Technical University-UPI, Ekaterinburg, Russian Federation; Nexiasolutions, BNFL, Sellafield, Seascale, Cumbria CA20 1PG, United Kingdom; CLRC Daresbury Laboratory, Warrington, Cheshire WA4 4AD, United Kingdom; ESRF, ROBL-CRG, BP 220, Grenoble, Cedex, France
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Correspondence Address May, I.; Centre for Radiochemistry Research, Department of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom; email: Iain.May@man.ac.uk
Editors Lumetta G.J.Friese J.I.Nash K.L.Clark S.B.
ISBN 0841239312; 9780841239319
CODEN ACSMC
Language of Original Document English
Abbreviated Source Title ACS Symp. Ser.
Source Scopus