Influence of phosphate glass recrystallization on the stability of a waste matrix to leaching
- Авторы: Yudintsev S.V.1, Pervukhina A.M.1, Mokhov A.V.1, Malkovsky V.I.1, Stefanovsky S.V.2
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Учреждения:
- Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry
- Frumkin Institute of Physical Chemistry and Electrochemistry
- Выпуск: Том 473, № 2 (2017)
- Страницы: 427-432
- Раздел: Geochemistry
- URL: https://ogarev-online.ru/1028-334X/article/view/189659
- DOI: https://doi.org/10.1134/S1028334X17040079
- ID: 189659
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Аннотация
In Russia, highly radioactive liquid wastes from recycling of spent fuel of nuclear reactors are solidified into Na–Al–P glass for underground storage. The properties of the matrix including the radionuclide fixation will change with time due to crystallization. This is supported by the results of study of the interaction between glassy matrices, products of their crystallization, and water. The concentration of Cs in a solution at the contact of a recrystallized sample increased by three orders of magnitude in comparison with an experiment with glass. This difference is nearly one order of magnitude for Sr, Ce, and Nd (simulators of actinides) and U due to their incorporation into phases with low solubility in water. Based on data on the compositional change of solutions after passing through filters of various diameters, it is concluded that Cs occurs in the dissolved state in runs with a glass and recrystallized matrix. At the same time, Sr, lanthanides, and U occur in the dissolved state and in the composition of colloids in runs with glass, and mostly in colloid particles after contact with the recrystallized sample. These results should be regarded for substantiation of safety for geological waste storage.
Об авторах
S. Yudintsev
Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry
Автор, ответственный за переписку.
Email: syud@igem.ru
Россия, Staromonetny per. 35, Moscow, 119991
A. Pervukhina
Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry
Email: syud@igem.ru
Россия, Staromonetny per. 35, Moscow, 119991
A. Mokhov
Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry
Email: syud@igem.ru
Россия, Staromonetny per. 35, Moscow, 119991
V. Malkovsky
Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry
Email: syud@igem.ru
Россия, Staromonetny per. 35, Moscow, 119991
S. Stefanovsky
Frumkin Institute of Physical Chemistry and Electrochemistry
Email: syud@igem.ru
Россия, Leninsky pr. 31, Moscow, 119991
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