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Gas Centrifuge Cascade for Concentrating 235U in Additional Product and Purification of Processed Uranium Hexafluoride from 232,234,236U

It is proposed that the 232,234,236U concentration in reprocessed uranium hexafluoride be lowered by adding an extra product stream into a cascade of gas centrifuges. In the extra product 235U is concentrated up to 95% or more while at the same time the 232,234,236U concentration is reduced. This product is diluted with waste uranium hexafluoride to 235U concentration <5%. A computational experiment was performed for cascades with a different number of gas centrifuges per stage. The product obtained after dilution with 232,234U was shown to meet the ASTM C996-15 specifications for commercial grade uranium hexafluoride. The 236U content is equal to 0.1% and requires very little compensation by raising the 235U concentration.

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  1. 1.

    A. A. Orlov, A. V. Kravchenko, E. S. Titov, and A. Ya. Lebedev, “Review of promising methods of uranium recycling in the nuclear fuel cycle,” Izv. Vyssh. Uchebn. Zaved. Fiz., 58, No. 2/2, 35–40 (2015).

  2. 2.

    V. I. Mazin, V. V. Vodolazskikh, V. A. Zhurin, et al., Patent No. 2497210 RF, “Method of isotopic reduction of regenerated uranium,” subm. Oct. 27, 2013, Byull. Izobret. Polezn. Modeli, No. 30, 714–715 (2013).

  3. 3.

    V. A. Palkin, “Separation of uranium isotopes in a cascade with an intermediate product,” Persp. Mater., No. 8, 11–14 (2010).

  4. 4.

    A. Yu. Smirnov and G. A. Sulaberidze, “Enrichment of regenerated uranium with simultaneous dilution of 232–236U with native raw materials and waste uranium,” At. Energ., 117, No. 1, 36–41 (2014); Atomic Energy, 117, No. 1, 44–51 (2014).

  5. 5.

    E. A. Bobrov, A. V. Gurin, and P. S. Teplov, “Computational and analytical modeling of the isotopic composition of fresh fuel based on reprocessed uranium for VVER reactor facilities within the STEM-NES software package for scenario studies of nuclear energy development,” Vopr. At. Nauki Tekhn. Ser. Fiz. Yad. Reakt., No. 5, 31–43 (2019).

  6. 6.

    V. A. Palkin and E. V. Maslyukov, “Purification of regenerated uranium hexafluoride from 232,234,236U in the intermediate product of a cascade with two feed flows,” At. Energ., 126, No. 2, 98–102 (2019); Atomic Energy, 126, No. 2, 110–115 (2019).

  7. 7.

    A. Yu. Smirnov, G. A. Sulaberidze, A. A. Dudnikov, and V. A. Nevinitsa, “Enrichment of regenerated uranium in a cascade of gas centrifuges with simultaneous dilution of 232–236U with waste and low-enriched uranium,” At. Energ., 125, No. 5, 287–290 (2017); Atomic Energy, 122, No. 5, 353–357 (2017).

  8. 8.

    A. Yu. Smirnov, V. E. Gusev, G. A. Sulaberidze, and V. A. Nevinitsa, “A method to enrich reprocessed uranium with various initial contents of even-numbered isotopes,” AIP Conf. Proc., 2101, Pap. 020006 (2019).

  9. 9.

    V. A. Palkin, “Multistream cascades for the separation of multicomponent isotopic mixtures,” At. Energ., 119, No. 2, 101–105 (2015); Atomic Energy, 119, No. 2, 125–131 (2015).

  10. 10.

    A. Yu. Smirnov, G. A. Sulaberidze, and V. D. Borisevich, “Influence of the feed flow profile of the cascade stages on the mass transfer of intermediate components” Teor. Osn. Khim. Tekhnol., 44, No. 6, 672–680 (2010); Theor. Found Chem. Eng., 44, No. 6, 888–896(2010).

  11. 11.

    V. Palkin and E. Maslyukov, “Restoration of the isotopic composition of reprocessed uranium hexafluoride using cascade with additional product,” Nucl. Eng. Techn., 52, 2867–2873 (2020).

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Correspondence to V. A. Palkin.

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Translated from Atomnaya Énergiya, Vol. 130, No. 2, pp. 83–88, February, 2021.

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Palkin, V.A., Smirnov, A.Y. & Sulaberidze, G.A. Gas Centrifuge Cascade for Concentrating 235U in Additional Product and Purification of Processed Uranium Hexafluoride from 232,234,236U. At Energy 130, 88–93 (2021).

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