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Recycling americium (Am) alone from spent nuclear fuels is an important option studied for the future nuclear cycle (Generation IV systems) since Am belongs to the main contributors of the long-term radiotoxicity and heat power of final waste. Since 2008, a liquid-liquid extraction process called EXAm has been developed by the CEA to allow the recovery of Am alone from a PUREX raffinate (a dissolution...
Tridentate hydrosoluble diglycolamide TEDGA (tetraethyldiglycolamide) has been introduced in the EXAm process to complex Cm(III) and heavier lanthanides and allow the recovery of Am(III) alone. An exhaustive study has been carried out on the complexation of the ligand TEDGA with representative cations (La to Lu and An(III)) in order to enhance the knowledge on chemical mechanisms in nitrate solutions...
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