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Deposition of Protective Coatings as a Way to Raise the Chemical Stability of Cured Forms of RW

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Abstract

Experiments on deposition of protective coatings on various materials have been performed. The samples obtained possess a high stability [leaching rate 10–4–10–5 g/cm2 day)] and can be used for long-term storage and/or burial of radioactive wastes.

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Notes

  1. The presence of 107Pd nuclide with half-life of 6.5 × 105 years in the reactor palladium restricts its application in the conventional fields, but would do no harm if used in the technology for processing of radioactive wastes [fabrication of containers, catching of hydrogen (tritium) at nuclear power plants, immobilization of iodine-129, TPEs, etc.].

  2. A distinctive feature of palladium is its ability to be dissolved in nitric acid. Therefore, if palladium-based materials are used for long-duration storage of TPEs and a necessity arises to extract these elements, it suffices to perform dissolution in the acid, with the subsequent extractive recovery (separation) of elements of interest (e.g., americium, curium) [4].

  3. Palladium iodide can rightfully pretend to serve as a compound for prolonged storage and/or final burial of 129I iodine radionuclides. Using the reactor palladium for synthesis of products of this kind seems to be quite justified in this case [5].

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  4. Pokhitonov, Yu. and Strelkov, S., Int. Conf. Waste Management-2006, Tucson (USA), February 2006.

  5. Pokhitonov, Yu.A., Radiochemistry, 2012, vol. 54, no. 1, p. 21. https://doi.org/10.1134/S106636221201002X

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Authors and Affiliations

  1. Khlopin Radium Institute, 194021, St. Petersburg, Russia

    Yu. A. Pokhitonov

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  1. Yu. A. Pokhitonov
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Correspondence to Yu. A. Pokhitonov.

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FUNDING

This work was financially supported by a grant competition for university students located in St. Petersburg, graduate students of universities, industry and academic institutions located in St. Petersburg (PSP no. 18505).

CONFLICT OF INTERESTS

The authors declare that they have no conflict of interest.

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Pokhitonov, Y.A. Deposition of Protective Coatings as a Way to Raise the Chemical Stability of Cured Forms of RW. Radiochemistry 62, 270–274 (2020). https://doi.org/10.1134/S1066362220020174

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  • DOI: https://doi.org/10.1134/S1066362220020174

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