METHOD FOR RECYCLING NUCLEAR WASTE, INCLUDING URANIUM (VI) PURIFICATION FROM AT LEAST ONE ACTINIDE (IV) BY PRODUCING ACTINIDE (IV) COMPLEX

摘要

FIELD: recycling and disposal of waste.;SUBSTANCE: invention relates to a process for nuclear waste recycling. Method for nuclear waste recycling includes purifying uranium (VI) from one or more actinides (IV). Purification involves at least one actinide (IV) or actinide (IV) separation step from an organic phase which is immiscible with water and contains tri-n-butyl phosphate as an extractant of uranium (VI), where in this organic phase there is uranium (VI) and actinide (IV) or actinides (IV), by bringing said organic phase into contact with an aqueous phase containing nitric acid and at least one complexing agent that forms stronger complexes with actinides (IV) than with uranium (VI), and then by separating the organic phase from the aqueous phase. As said at least one complexing agent, a diglycol amide is used.;EFFECT: invention makes it possible to exclude the "second uranium cycle", which will reduce the amount of consumed reagents.;15 cl, 6 dwg