Title: Recovery of actinides from actinide-aluminium alloys by chlorination: Part III - Chlorination with HCl(g)
Citation: JOURNAL OF NUCLEAR MATERIALS vol. 498 p. 213 - 220
Publication Year: 2018
JRC N°: JRC106731
ISSN: 0022-3115
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC106731
DOI: 10.1016/j.jnucmat.2017.09.045
Type: Articles in periodicals and books
Abstract: Two steps of a pyrochemical route for the recovery of actinides from spent metallic nuclear fuel are being investigated at JRC-Karlsruhe. The first step consists in electrorefining the fuel in molten salt medium implying aluminium cathodes. The second step is a chlorination process for the separation of actinides from An-Al alloys formed on the cathodes. It consists of three steps; the distillation of adhered salt, the chlorination of An-Al by HCl/Cl2 under formation of AlCl3 and An chlorides, and the subsequent sublimation of AlCl3. In the present work UAl2, UAl3, NpAl2, and PuAl2 were chlorinated with HCl(g) in a temperature range between 300 and 400°C forming UCl4, NpCl4 or PuCl3 as the major An containing phases, respectively. Thermodynamic calculations were carried out to support the experimental work. The results showed a high chlorination efficiency for all used starting materials and indicated that the sublimation step may not be necessary when using HCl(g).
JRC Directorate:Nuclear Safety and Security

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