METHOD OF TREATING CONTAMINATED URANIUM MATERIAL Russian patent published in 2009 - IPC G21C19/42 C01G43/06 B01D59/20 

FIELD: nuclear physics.

SUBSTANCE: invention relates to a nuclear fuel cycle, and specifically to methods of treating contaminated hazardous ²³²U, ²³⁴U, ²³⁶U isotopes of uranium material on a gas centrifuge cascade. The method involves treating contaminated uranium material fed into a gas centrifuge cascade, obtaining low enriched uranium from cascade selection using natural uranium hexafluoride in an intermediate cascade selection into which natural uranium hexafluoride is fed, producing a product with low concentration of at least one of the hazardous ²³²U, ²³⁴U, ²³⁶U isotopes compared to contaminated material with mass ratio of contaminated uranium material to natural uranium hexafluoride taken for treatment equal to (1÷25):100.

EFFECT: treating uranium material contaminated with hazardous impurities, obtaining quality material with permissible content of limiting hazardous isotopes, widening of the raw material base for fission plants, less separation work for processing material.

7 cl, 4 dwg, 7 ex