The problem of the formation of uranium residue in spent sodium fluoride sorbent is studied. The mechanisms of the formation of un-desorbed uranium residue with thermal desorption of uranium hexafluoride from the surface sodium fluoride are examined. It is proved that hydrolysis of sorbed and gaseous uranium hexafluoride under the conditions of sublimate-separation production is impossible. The most likely mechanism of residue formation is partial reduction of hexavalent uranium, which is due to the chemical properties of the system UF6–NaF. A possible process of uranium reduction as a result of nuclear-chemical transformations requires study and experimental confirmation.
Similar content being viewed by others
References
V. S. Akishin, L. G. Bakhmatov, R. M. Bilyalov, et al., “Separation of a mixture of uranium hexafluoride with hydrogen fluoride into components by the methods of sorption-desorption,” in: 5th Sci.-Techn. Conf. of the Siberian Chemical Combine Dedicated to the 50th Anniversary of the Works, Section 3, Seversk (1999), p. 95.
O. V. Gromov, A. V. Ivanov, V. A. Seredenko, and V. V. Shatalov, “Technical fluorine refinements,” in: Proc. 2nd Int. Siberian Workshop ISIF-2006 on Advanced Inorganic Fluorides, Nikolaev Institute of Inorg. Chem. SB RAS, Novosibirsk (2006), p. 80.
V. V. Shatalov, M. B. Seregin, O. V. Vishnyakova, et al., “Investigation of sorption removal of volatile ruthenium, niobium, and molybdenum fluorides from uranium hexafluoride formed during fluoridation of oxide fuel,” in: Radiokhimiya-2009, PO Mayak, Ozersk (2009), p. 175.
V. G. Afanasiev, V. G. Gridnev, B. M. Zimin, et al., “Gas-sorption separation of a mixture of uranium hexafluoride, bromine trifluoride, iodine pentafluoride into components,” in: 6th Sci.-Techn. Conf. of the Siberian Chemical Combine, Part 2, STI TPU, Seversk (2001), p. 114.
O. B. Gromov, “Reprocessing and salvaging of uranium and fluorine containing gas mixtures from separation production,” Khim. Tekhnol., 10, No. 3, 183 (2009).
O. B. Gromov, V. V. Vodolazskikh, P. V. Sernaev, et al., “Decontamination of accidental emission of uranium hexafluoride at the isotope separation plant of the Siberian Chemical Works,” At. Énerg., 107, No. 1, 22–26 (2009).
N. P. Galkin, V. A. Zaitsev, and M. B. Seregin, Catching and Reprocessing Fluorine-Containing Gases, Atomizdat, Moscow (1975).
H. Martin, A. Albers, and H. Dust, “Doppelfluoride des uranhexafluorids,” Z. Anorg. Allgem. Chem., 265, 128 (1951).
O. B. Gromov and V. A. Evseev, “Deep extraction of uranium from spent sodium nitrate resource,” in: 6th Sci.-Techn. Conf. Siberian Chemical Combine, Part 2, STI TPU, Seversk (2001), p.130.
O. B. Gromov, V. P. Mashirev, P. V. Zernaev, et al., “Extraction of un-desorbed uranium residue from sodium fluoride sorbent,” in: Radiokhimiya-2009, PO Mayak, Ozersk (2009), p. 174.
S. Katz, “Use of high-surface-area sodium fluoride to prepare MF6–2NaF complexes with uranium, tungsten, and molybdenum hexafluorides,” Inorg. Chem., 3, No. 11, 1598 (1964).
G. Cathers and V. Bennet, “UF6–3NaF complex formation and decomposition,” Ind. Eng. Chem., 59, No. 11, 1709 (1958).
S. Katz and G. Cathers, “A gas sorption-desorption method for separating the hexafluorides of neptunium and uranium,” Nucl. Appl., 5, No. 4, 206 (1968).
V. S. Akishin, Yu. F. Kobzar, V. M. Korotkevich, et al., “Analysis of the operation of a unit catching uranium hexafluoride from waste gases of the M-2079 facility and ways to improve he technological regimes and equipment,” in: 5th Sci.-Techn. Conf. Siberian Chemical Combine Dedicated to the 50th Anniversary of the Works, Sec. 3, Seversk (1999), p. 89.
V. D. Vdovichenko, O. B. Gromov, A. N. Evdokimov, et al., “Conditions for obtaining and properties of uranium pentafluoride,” Khim. Tekhnol., 8, No. 9, 429 (2007).
Author information
Authors and Affiliations
Additional information
V. G. Soloviov (Deceased).
Translated from Atomnaya Énergiya, Vol. 109, No. 2, pp. 77–81, August, 2010.
Rights and permissions
About this article
Cite this article
Gromov, O.B., Mikhalichenko, A.A., Mikheev, P.I. et al. Reduction of uranium hexafluoride adsorbed on sodium fluoride. At Energy 109, 96–101 (2010). https://doi.org/10.1007/s10512-010-9329-5
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10512-010-9329-5