Modeling the leaching of aluminophosphate glass in the presence of bentonite-Reference-Cited by-同舟云学术

Modeling the leaching of aluminophosphate glass in the presence of bentonite

Published:2024-07-21 Issue:1 Volume: Page:23-32
ISSN:0869-7809
Container-title:Геоэкология. Инженерная геология. Гидрогеология. Геокриология
language:
Short-container-title:Geoèkologiâ

Author:

Boldyrev K. A.¹

Affiliation:

1. Institute for Safe Development of Nuclear Power Engineering, Russian Academy of Sciences

Abstract

The article presents a model of aluminophosphate glass leaching, an analogue of the RW glass matrix, in static mode in the presence of bentonite. Parameterization of the model is based on experimental data. The model takes into account the kinetics of the glass matrix leaching and the transformation of bentonite mineral phases; sorption processes are also taken into account, as well as the inhibition of leaching by the precipitation of secondary mineral phases formed. The model demonstrates a small transformation of clay phases, as well as the formation of secondary phosphate phases and gibbsite upon leaching of glass in the contact zone with bentonite. The simulation was carried out in the PhreeqC software.

Publisher

The Russian Academy of Sciences

Reference18 articles.

1. Abramov, A.A., Dorofeev, A.N. [Current state and prospects of development of the RW managements system in the Russian Federation]. Radioactivnye otkhody, 2017, no. 1, pp. 10–21. (in Russian)

2. Boldyrev, K.A., Kryuchkov, D.V., Martinov, K.V. et al. [Development of calculation methods for estimating the migration of radionuclides beyond the engineering safety barriers, taking into account their evolution]. Preprint IBRAE-2017–11. Moscow, IBRAE RAN, 2017, 23 p. (in Russian)

3. Kryuchkov, D.V., Boldyrev, K.A. [Principles ensuring comprehensive accounting of processes associated with engineered safety barriers’ evolution: assessing radionuclide spread beyond site boundaries]. Radioactivnye otkhody, 2019, no. 4 (9), pp. 106–115. https://doi.org/ 10 25283/2587-9707-2019-4-106-115 (in Russian)

4. Ozhovan, M.I., Poluektov, P.P. [Glasses for immobilization of nuclear waste]. Priroda, 2010, no. 3, pp. 3–11. (in Russian)

5. Sobolev, D.A. [Calculation of the values of the solubility limits of solid mineral phases of a number of radionuclides for predicting the release of radionuclides from matrices of different compositions]. Proc. the XXI Sci. Workshop of young scientists, IBRAE RAS, 2022, pp. 88–91.