Restoration of the isotopic composition of reprocessed uranium hexafluoride using cascade with additional product

Valerii Palkin, Eugenii Maslyukov
2020 Nuclear Engineering and Technology  
Please cite this article as: V. Palkin, E. Maslyukov, Restoration of the isotopic composition of reprocessed uranium hexafluoride using cascade with additional product, Nuclear Engineering and Technology (2020), doi: https://doi. Abstract In reprocessed uranium, derived from an impoverished fuel of light-water moderated reactors, there are isotopes of 232, 234, 236 U, which make its recycling remarkably difficult. A method of concentration of 235 U target isotope in cascade's additional product
more » ... additional product was proposed to recover the isotopic composition of reprocessed uranium. A general calculation procedure is presented and a parameters' optimization of multi-flow cascades with additional products. For the first time a numeric model of a cascade that uses the cuts of partial flows of stages with relatively high separation factors was applied in this procedure. A novel computing experiment is carried out on separation of reprocessed uranium hexafluoride with providing a high concentration of 235 U in cascade's additional product with subsequent dilution. The parameters of cascades' stages are determined so as to allow reducing the 232, 234, 236 U isotope content up to the acceptable. It was demonstrated that the dilution of selected products by the natural waste makes it is possible to receive a low enriched uranium hexafluoride that meets the ASTM C996-15 specification for commercial grade.
doi:10.1016/j.net.2020.05.020 fatcat:xkwzfgqox5aidnboujvjh5r7mq