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Recovery of actinides from actinide-aluminium alloys by chlorination: Part I

Cassayre, Laurent and Soucek, Pavel and Mendes, Eric and Malmbeck, Rikard and Nourry, Christophe and Eloirdi, Rachel and Glatz, Jean-Paul Recovery of actinides from actinide-aluminium alloys by chlorination: Part I. (2011) Journal of Nuclear Materials, vol. 414. pp. 12-18. ISSN 0022-3115

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Official URL: http://dx.doi.org/10.1016/j.jnucmat.2011.04.023

Abstract

Pyrochemical processes in molten LiCl–KCl are being developed in ITU for recovery of actinides from spent nuclear fuel. The fuel is anodically dissolved to the molten salt electrolyte and actinides are electrochemically reduced on solid aluminium cathodes forming solid actinide–aluminium alloys. A chlorination route is being investigated for recovery of actinides from the alloys. This route consists in three steps: Vacuum distillation for removal of the salt adhered on the electrode, chlorination of the actinide– aluminium alloys by chlorine gas and sublimation of the formed AlCl3. A thermochemical study showed thermodynamic feasibility of all three steps. On the basis of the conditions identified by the calculations, experiments using pure UAl3 alloy were carried out to evaluate and optimise the chlorination step. The work was focused on determination of the optimal temperature and Cl2/UAl3 molar ratio, providing complete chlorination of the alloy without formation of volatile UCl5 and UCl6. The results showed high efficient chlorination at a temperature of 150 °C.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Journal of Nuclear Materialswebsite : http://dx.doi.org/10.1016/j.jnucmat.2011.04.023
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS (FRANCE)
Other partners > Institute for Transuranium Elements - ITU (GERMANY)
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Deposited By: Laurent CASSAYRE
Deposited On:09 Apr 2013 14:27

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