Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Interaction between UN and CdCl2 in molten LiCl-KCl eutectic. II. Experiment at 1023 K

  • Zhitkov, Alexander (Institute of High Temperature Electrochemistry of the Ural Branch of the Russian Academy of Sciences) ;
  • Potapov, Alexei (Institute of High Temperature Electrochemistry of the Ural Branch of the Russian Academy of Sciences) ;
  • Karimov, Kirill (Institute of High Temperature Electrochemistry of the Ural Branch of the Russian Academy of Sciences) ;
  • Kholkina, Anna (Institute of High Temperature Electrochemistry of the Ural Branch of the Russian Academy of Sciences) ;
  • Shishkin, Vladimir (Institute of High Temperature Electrochemistry of the Ural Branch of the Russian Academy of Sciences) ;
  • Dedyukhin, Alexander (Institute of High Temperature Electrochemistry of the Ural Branch of the Russian Academy of Sciences) ;
  • Zaykov, Yury (Institute of High Temperature Electrochemistry of the Ural Branch of the Russian Academy of Sciences)
  • Received : 2021.02.20
  • Accepted : 2021.08.25
  • Published : 2022.02.25
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Abstract

The interaction between UN and CdCl2 in the LiCl-KCl molten eutectic was studied at 1023 K. The chlorination was monitored by sampling and recording the redox potential of the medium. At 1023 K the chlorination of UN with cadmium chloride in the molten LiCl-KCl eutectic proceeds completely and results in the formation of uranium chlorides. The melts of the LiCl-KCl-UCl3 or LiCl-KCl-UCl4 compositions can be obtained by the end of experiment depending on the presence of metallic cadmium in the reaction zone. The higher the concentration of the chlorinating agent, the faster the reaction rate. At [CdCl2]/[UN] = 1.65 (10% excess) the reaction proceeds to completion in about 7.5 h. At [CdCl2]/[UN] = 7 the complete chlorination takes 2.5-3 h.

Keywords

Acknowledgement

The authors gratefully acknowledge for analytical support of the Shared Access Centre "Composition of Compounds" of the Institute of High Temperature Electrochemistry of the Ural Branch of the Russian Academy of Sciences. The present research was partially performed within the Proryv (Breakthrough) project of State Atomic Energy Corporation Rosatom.

References

  1. A. Zhitkov, A. Potapov, K. Karimov, V. Shishkin, A. Dedyukhin, Y. Zaykov, Interaction between UN and CdCl2 in molten LiCl-KCl eutectic. I. Experiment at 773 K, Nucl. Eng. Technol. 52 (2020) 123-134. https://doi.org/10.1016/j.net.2019.07.006
  2. B.D. Vasin, S.V. Maslov, V.A. Volkovich, I.B. Polovov, S.A. Kazakov, O.I. Rebrin, Application of oxidimetry for determining speciation of transition metals in molten chlorides, in: Proceedings of the 7-th International Symposium on Molten Salts Chemistry and Technology, vol. 1, 2005, pp. 335-340.
  3. L. Yang, R.G. Hudson, Equilibrium electrode potentials of some metal-chlorine galvanic cells and activities of some metal chlorides in LiCl-KC1 eutectic melt, Trans. Met. Soc. AIME 215 (1959) 589-601.
  4. S.A. Kuznetsov, H. Hayashi, K. Minato, M. Gaune-Escard, Electrochemical behavior and some thermodynamic properties of UCl4 and UCl3 dissolved in a LiCl-KCl eutectic melt, J. Electrochem. Soc. 152 (4) (2005) C203-C212. https://doi.org/10.1149/1.1864532
  5. H. Hayashi, T. Sato, H. Shibata, M. Kurata, T. Iwai, Y. Arai, Pyrochemical treatment of spent nitride fuels for MA transmutation, Sci. China Chem. (2014) 1427-1431. https://doi.org/10.1007/s11426-014-5205-9
  6. D.R. Lide (Ed.), CRC Handbook of Chemistry and Physics, 90th Ed., CRC Press, Boca Raton, FL, 2009.
  7. T. Koyama, K. Uozumi, M. Iizuka, Y. Sakamura, K. Kinoshita, Pyrometallurgy Data Book, CRIEPI Report T93033, 1994.
  8. L.C. George, R.M. Doerr, A. Visnapuu, Vapor pressure of the cadmium chloridelead chloride system, J. Chem. Eng. Data 14 (1) (1969) 23-26. https://doi.org/10.1021/je60040a023
  9. W.F. Gale, T.C. Totemeier (Eds.), Smithells Metals Reference Book, eighth ed., 2004, p. 2072.
  10. C.L. Yaws, M.A. Satyro, Vapor pressure - inorganic compounds, in: The Yaws Handbook of Vapor Pressure, second ed., 2015, pp. 315-322 (Chapter 2).