| abstract |
The invention relates to a method for very effectively separating a chemical element from uranium using an aqueous acid phase, in a uranium extraction cycle, when this chemical element is present in said phase with a concentration below that of the uranium, or even in trace amount, and when, in addition, it is less extractable by the extractant used in this extraction cycle than uranium. The chemical element may in particular be neptunium (IV) or thorium 228. Applications: reprocessing of irradiated nuclear fuels. |