Electrorefining of U-Pu-Zr-alloy fuel onto solid Aluminium cathodes in molten LiCl-KCl - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Radiochimica Acta Année : 2008

Electrorefining of U-Pu-Zr-alloy fuel onto solid Aluminium cathodes in molten LiCl-KCl

Résumé

An electrorefining process in molten chloride salts using solid aluminium cathodes is being developed at ITU to recover actinides (An) from the spent nuclear fuel. The maximum possible loading of aluminium electrodes with actinides was investigated during the electrorefining of UPuZr alloy in a LiCl-KCl eutectic at 450°C. Two different electrolytic techniques were applied during the experiment and almost 6000 C has been passed, corresponding to 3.7 g of deposited actinides. A very high capacity of aluminium to retain actinides has been proven as the average Al:An mass ratio was 1:1.58 for galvanostatic and 1:2.25 for potentiostatic mode. The obtained deposits were characterized by XRD and SEM-EDX analysis and alloys composed of (U,Pu)Al3 were detected. The influence of zirconium co-oxidation during the process was also investigated and the presence of dissolved Zr ions in the melt yielded a significant deterioration of the quality of the deposit.

Domaines

Génie chimique
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Dates et versions

hal-04468073 , version 1 (20-02-2024)

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Pavel Soucek, Laurent Cassayre, Rikard Malmbeck, Eric Mendes, Régis Jardin, et al.. Electrorefining of U-Pu-Zr-alloy fuel onto solid Aluminium cathodes in molten LiCl-KCl. Radiochimica Acta, 2008, 9 (4-5), pp.315-322. ⟨10.1524/ract.2008.1493⟩. ⟨hal-04468073⟩
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