Application of Quasi-Ideal Cascades and the Dilution Operation for Purification of Regenerated Uranium Hexafluoride

摘要

Purification of regenerated uranium in a two-cascade scheme with a dilution operation is proposed. The first cascade has one feed flow, two product flows, and one waste flow. It is calculated as an ideal cascade with adjustment of the obtained U-235 concentration to a prescribed content in the exterior flows. Lowenrichment uranium hexafluoride, intended for the fabrication of nuclear fuel, is obtained in the primary product. A product with the same U-235 concentration as in the feed flow and reduced U-232,U-234 is produced in the intermediate product of the cascade. This product is enriched with U-235 in the second cascade, which is an R-cascade with the key components (UF6)-U-235,236. The enriched uranium hexafluoride obtained in the product is diluted to U-235 concentration below 5%. The U-236 content decreases as a result.