METHOD OF ISOTOPIC RECOVERY OF REGENERATED URANIUM Russian patent published in 2013 - IPC G21C19/42 B01D59/20 

FIELD: power engineering.

SUBSTANCE: method of isotopic recovery of regenerated uranium includes increase of content of isotope U-235 in hexafluoride of regenerated uranium to the specified value in the range of 2.0÷5.0 wt %, reduction of relative concentration of isotope U-232 in the mixture of uranium isotopes and direct enrichment of hexafluoride of regenerated uranium with isotope U-235 on the double-cascade plant from separation stages of gas centrifuges. At the same time in the first cascade the regenerated uranium is enriched with isotope U-235 up to 5.0÷10.0 wt % with maintenance of ratio of mass flows of the dump flow and bleed flow of the cascade in the range of (6.9÷18.4):1. Flows of the dump and bleed of the first cascade are sent for supply of the second cascade. The regenerated uranium is bled from the separating stage of the central part of the second cascade.

EFFECT: complete treatment of a burnt mixture of uranium isotopes from the most radiation-hazardous nuclide U-232 and production of commercial low-enriched uranium hexafluoride at minimum retuning of industrial cascades of centrifuges.

2 cl, 1 dwg, 7 tbl