Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Effect of irradiation on the oxidation kinetics of TODGA-based extraction mixtures at atmospheric pressure

  • Skvortsov, I.V. (A.N. Frumkin Institute of Physical Chemistry and Electrochemistry of RAS (IPCE RAS)) ;
  • Belova, E.V. (A.N. Frumkin Institute of Physical Chemistry and Electrochemistry of RAS (IPCE RAS)) ;
  • Yudintsev, S.V. (Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry)
  • Received : 2019.09.05
  • Accepted : 2020.02.28
  • Published : 2020.09.25
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Abstract

The gas evolution from mixtures consisting of 0.2 M solution of N,N,N',N'-tetra-n-octyldiglycolamide (TODGA) in n-alcohol (n-decanol or n-nonanol) with Isopar-M diluent was investigated during thermal oxidation. The effect of ionizing radiation on their thermal stability has been studied. It has been determined that the volume of gaseous thermolysis products increases by 260% in the case of n-nonanol and 80% in the case of n-decanol compared to non-irradiated solutions. It has been shown that the gas evolution rate and gas volume increase when the irradiated mixture saturated with nitric acid is heated. However, there are no prerequisites for the development of autocatalytic oxidation.

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References

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  1. The effect of aliphatic alcohol additives on the radiolytic degradation of TODGA in Isopar-M vol.326, pp.2, 2020, https://doi.org/10.1007/s10967-020-07375-3
  2. Thermochemical Stability of Extraction Systems for SNF Processing vol.62, pp.6, 2020, https://doi.org/10.1134/s1066362220060053
  3. Contribution of nitric acid and alcohol to the radiolytic degradation of TODGA in Isopar-M vol.328, pp.3, 2020, https://doi.org/10.1007/s10967-021-07732-w
  4. Direct and Indirect Effects of an Electron Beam on N,N,N',N'-Tetra-n-Octyl Diglycolamide in Hydrocarbon-Alcohol Solutions vol.55, pp.6, 2021, https://doi.org/10.1134/s0018143921060114