Purification of Regenerated Uranium Hexafluoride in a Two-Cascade Scheme with <5% 235U Enrichment

Two schemes are proposed for purifying regenerated uranium hexafluoride in double cascades. A large flow of native and a small flow of regenerated uranium are fed into the first cascade. One of the external outgoing flows contains low-enrichment uranium with prescribed concentration < 5%. The concentration of the second outgoing U-235 flow coincides with the regenerated uranium feed concentration. In this flow, corresponding to purified regenerated uranium hexafluoride, the U-232,U-234,U-236 concentration decreases. The obtained products meet the ASTM C 996-10 specifications for low-enrichment uranium hexafluoride.