Abstract
Beyond-design-basis regimes of centrifugal contactors for U stripping and of mixer–settlers for carbonate regeneration of the solvent, 30% TBP in Isopar M, were studied from the viewpoint of the influence of incomplete uranium stripping on the phase stability of the extraction system in the step of the carbonate scrubbing of the solvent. Dynamic relationship between these two operations was determined. A mathematical model of uranium stripping at stepwise–20% deviation from the nominal value was developed and verified; it was shown that the beyond-design-basis regime develops in such apparatuses within 4 h at the total trial time longer than 8 h. The mathematical relationships obtained were used in the development of software for calculating transient processes that occur when the stream parameters in the course of carbonate regeneration of the solvent change. The beyond-design-basis regime of the solvent regeneration was found to have two regions: region of stoichiometric excess of carbonate ions over uranyl ions with the risk of precipitation and region of excess of uranyl ions over carbonate ions with acidification of the unit and uranium breakthrough with the recycled solvent. The conditions of the tests performed correspond to the second region.
Similar content being viewed by others
References
Reactor Handbook, vol. 2: Fuel Reprocessing, Stoller, S.M. and Richards, R.B., Eds., New York: Interscience, 1961, 2nd ed. Translated under the title Pererabotka yadernogo goryuchego, Moscow: Atomizdat, 1964, pp. 184–230.
Rozen, A.M., Reshet’ko, Yu.V., and Zel’venskii, M.Ya., At. Energ., 1974, vol. 37, no. 3, pp. 187–193.
Zilberman, B.Ya., Fedorov, Yu.S., Puzikov, E.A., et al., Radiochemistry, 2014, vol. 56, no. 6, pp. 583–592.
Puzikov, E.A., Goletskii, N.D., Zilberman, B.Ya., et al., Radiochemistry, 2017, vol. 59, no. 5, pp. 469–481.
Zherin, I.I. and Amelina, G.N., Khimiya toriya, urana, plutoniya: Uchebnoe posobie (Chemistry of Thorium, Uranium, and Plutonium: Textbook), Tomsk: Tomsk. Politekh. Univ., 2010, p. 104.
Puzikov, E.A., Zilberman, B.Ya., Fedorov, Yu.S., et al., Radiochemistry, 2004, vol. 46, no. 2, pp. 149–156.
Zilberman, B.Ya., Fedorov, Yu.S., Puzikov, E.A., and Blazheva, I.V., Decelopment of the database and adaptation of the mathematical model of the Purex process to the conditions of reprocessing of high-burn-up spent nuclear fuel from nuclear power plants, Preprint of the Khlopin Radium Inst., St. Petersburg, 2009, no. RI-264.
Puzikov, E.A., Zilberman, B.Ya., Fedorov, Yu.S., et al., Radiochemistry, 2013, vol. 55, no. 2, pp. 190–202.
Dzhivanova, Z.V., Belova, E.V., Tkhorzhnitskii, G.P., et al., Radiochemistry, 2015, vol. 57, no. 2, pp. 143–151.
Gofman, F.E., Gofman, R.D., Evdokimov, A.G., et al., in Nauchnaya konferentsiya “Razvitie idei V.I. Vernadskogo v sovremennoi rossiiskoi nauke”: Sbornik trudov (Scientific Conf. “Development of V.I. Vernadsky’s Ideas in the Modern Russian Science”: Coll. of Papers), St. Petersburg, Oct. 17–19, 2013, pp. 219–224.
Analiticheskaya khimiya urana (Analytical Chemistry of Uranium), Vinogradov, A.P., Ed., Moscow: Atomizdat, 1962, pp. 95–96.
Blazheva, I.V., Goletskii, N.D., Zilberman, B.Ya., et al., RF Patent 2 473 144, Byull. Izobret., 2013, no. 2.
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © E.A. Puzikov, N.D. Goletskii, B.Ya. Zilberman, A.S. Kudinov, A.A. Naumov, D.N. Kukharev, M.S. Agafonova-Moroz, D.V. Ryabkov, O.V. Shmidt, 2017, published in Radiokhimiya, 2017, Vol. 59, No. 6, pp. 517–524.
Rights and permissions
About this article
Cite this article
Puzikov, E.A., Goletskii, N.D., Zilberman, B.Y. et al. Beyond-design-basis regimes of uranium stripping and of carbonate regeneration of the solvent. Radiochemistry 59, 587–595 (2017). https://doi.org/10.1134/S1066362217060066
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1066362217060066