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arXiv · 2503.18442

Description processes of the interaction of water and aqueous solutions with fuel-containinig materials in the New Safe Confinement of the "Shelter'' object

M. V. Tokarchuk·B. M. Markovych·O. S. Zakharyash·O. L. Ivankiv·S. M. Mohnyak
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Abstract

The main mechanisms and conditions of interaction of lava-like fuel-containing materials (LFCM) with the atmosphere, water and aqueous solutions are presented. The mechanisms of destruction of the LFCM surface, including ion-exchange processes, hydrolysis, dissolution, oxidation, etc., were analyzed. Inhomogeneous diffusion coefficients for UO$_{2}^{2+}$, Cs$^{+}$ ions at the interface "aqueous solution of radioactive elements - LFCM" were calculated. The interdiffusion processes and the rate of penetration into the porous medium of the reaction front of the internal hydrolysis of the silicon-oxygen network during interaction with an aqueous solution were analyzed, where the reaction and adsorption processes are hidden in the rate of internal hydrolysis.

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M. V. Tokarchuk, B. M. Markovych, O. S. Zakharyash, O. L. Ivankiv, S. M. Mohnyak. 2025-03-24. Description processes of the interaction of water and aqueous solutions with fuel-containinig materials in the New Safe Confinement of the "Shelter'' object. https://doi.org/10.5488/cmp.28.11601

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