SEPARATION GROUPEE DES ACTINIDES A PARTIR D'UNE PHASE AQUEUSE FORTEMENT ACIDE, UTILISANT UN EXTRACTANT SOLVATANT EN MILIEU RELARGANT.

摘要

Separating actinide groups (III), (IV), (V) and (VI) from a strong acidic aqueous phase that optionally contains fission products from which lanthanides or yttrium, comprises: coextraction of actinides, lanthanides or yttrium and optionally fission products, from the aqueous phase by contacting with water insoluble organic phase of a solvating extractant, like diglycolamides or malonamides in an organic diluent; and selective extraction of actinides from the organic phase by contacting the organic phase with a weak acidic aqueous phase comprising a complexing agent and nitrate ions. An independent claim is included for a process for reprocessing of irradiated nuclear fuel by implementing the given process.