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Thermodynamic analysis of radioactive graphite reprocessing by incineration in air and oxidation in molten salt

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Abstract

Reactor graphite waste of nuclear industry contains various radionuclides. This study deals with the behaviour of radioactive elements during thermal treatment of waste. Two thermal processes were simulated: incineration of graphite in air and oxidation of graphite in a molten salt, containing Na2CO3 + K2CO3 + 20 mass% PbO. Carbon oxides CO and CO2, containing radioactive 14C, are the main components of the gaseous phase with partial pressures approximately 104 Pa in both cases. More gaseous radionuclides are observed during incineration of graphite in air than during oxidation of graphite in the molten salt. In the latter case radionuclides are in the condensed state in the melt of sodium and potassium carbonates.

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Authors and Affiliations

  1. Ural State Agrarian University, 42 Karla Libknehta Street, Yekaterinburg, 620075, Russia

    N. M. Barbin

  2. Ural Institute of State Fire Fighting Service of EMERCOM of Russia, 22 Mira Street, Yekaterinburg, 620062, Russia

    N. M. Barbin, D. I. Terentiev & S. G. Alexeev

  3. Science and Engineering Centre “Reliability and Safety of Large Systems” of Ural Branch of Russian Academy of Sciences, 54a Studencheskaya Street, Yekaterinburg, 620049, Russia

    S. G. Alexeev

  4. Ural Federal University Named After the First President of Russia B.N. Yeltsin, 19 Mira Street, Yekaterinburg, 620002, Russia

    T. M. Barbina

Authors
  1. N. M. Barbin
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  2. D. I. Terentiev
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  3. S. G. Alexeev
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  4. T. M. Barbina
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Correspondence to N. M. Barbin.

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Barbin, N.M., Terentiev, D.I., Alexeev, S.G. et al. Thermodynamic analysis of radioactive graphite reprocessing by incineration in air and oxidation in molten salt. J Radioanal Nucl Chem 299, 1747–1757 (2014). https://doi.org/10.1007/s10967-013-2871-6

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  • DOI: https://doi.org/10.1007/s10967-013-2871-6

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