Recovery of actinides from actinide-aluminium alloys by chlorination: Part III - Chlorination with HCl(g)
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 separatio...
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| Main Authors: | , , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
2018
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| In: |
Journal of nuclear materials
Year: 2017, Volume: 498, Pages: 213-220 |
| DOI: | 10.1016/j.jnucmat.2017.09.045 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/j.jnucmat.2017.09.045 Verlag, lizenzpflichtig, Volltext: http://www.sciencedirect.com/science/article/pii/S0022311517307985 
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| Author Notes: | Roland Meier, Pavel Souček, Olaf Walter, Rikard Malmbeck, Alcide Rodrigues, Jean-Paul Glatz, Thomas Fanghänel |
| Summary: | 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 (An) from An-Al alloys formed on the cathodes. The chlorination process, in turn, consists of three steps; the distillation of adhered salt (1), the chlorination of An-Al by HCl/Cl2 under formation of AlCl3 and An chlorides (2), and the subsequent sublimation of AlCl3 (3). 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). |
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| Item Description: | Available online: 4 October 2017 Im Titel Gesehen am 26.03.2020 |
| Physical Description: | Online Resource |
| DOI: | 10.1016/j.jnucmat.2017.09.045 |