Effect of Gamma Irradiation on Structural Features and Dissolution of Nuclear Waste Na–Al–P Glasses in Water

Alexey V. Luzhetsky, Vladislav A. Petrov, Sergey V. Yudintsev, Viktor I. Malkovsky, Michael I. Ojovan, Maximilian S. Nickolsky, Andrey A. Shiryaev, Sergey S. Danilov and Elizaveta E. Ostashkina
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Alexey V. Luzhetsky: Federal State Unitary Enterprise-United Ecological, Scientific and Research Centre of Decontamination of Radioactive Waste (RAW) and Environmental Protection, 119121 Moscow, Russia
Vladislav A. Petrov: Institute of Geology of Ore deposits, Petrography, Mineralogy and Geochemistry, 119017 Moscow, Russia
Sergey V. Yudintsev: Institute of Geology of Ore deposits, Petrography, Mineralogy and Geochemistry, 119017 Moscow, Russia
Viktor I. Malkovsky: Institute of Geology of Ore deposits, Petrography, Mineralogy and Geochemistry, 119017 Moscow, Russia
Michael I. Ojovan: Institute of Geology of Ore deposits, Petrography, Mineralogy and Geochemistry, 119017 Moscow, Russia
Maximilian S. Nickolsky: Institute of Geology of Ore deposits, Petrography, Mineralogy and Geochemistry, 119017 Moscow, Russia
Andrey A. Shiryaev: Institute of Geology of Ore deposits, Petrography, Mineralogy and Geochemistry, 119017 Moscow, Russia
Sergey S. Danilov: Vernadsky Institute of Geochemistry and Analytical Chemistry, 119991 Moscow, Russia
Elizaveta E. Ostashkina: Federal State Unitary Enterprise-United Ecological, Scientific and Research Centre of Decontamination of Radioactive Waste (RAW) and Environmental Protection, 119121 Moscow, Russia

Sustainability, 2020, vol. 12, issue 10, 1-23

Abstract: Structural properties and water dissolution of six sodium–aluminum–phosphate (NAP) glasses have been investigated before and after irradiation by a gamma-ray source based on 60 Co. Two of these samples were of simple composition, and four samples had a complex composition with radionuclide simulants representing actinides, fission, and activated corrosion products. Samples of the simple composition are fully vitreous, whereas samples of the complex composition contained up to 10 vol.% of aluminum–phosphate, AlPO 4 , and traces of ruthenium dioxide, RuO 2 . Based on the study of pristine and irradiated glasses, it was established that the radiation dose of 62 million Gray had practically no effect on the phase composition and structure of samples. At the same time, the rate of leaching of elements from the irradiated samples by water was decreased by about two times.

Keywords: highly radioactive waste; immobilization; matrix; sodium–aluminum–phosphate glass; properties; irradiation; leaching resistance. (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2020
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