Substantiation of necessary and sufficient indicators of clay materials for constructing engineering safety barriers

Substantiation of necessary and sufficient indicators of clay materials for constructing engineering safety barriers.

Ilina O. A., Krupskaya V. V., Zakusin S. V., Ponizov A. V., Murlis D. V., Vereshchagin P. M.

The article discusses characteristics of barrier clay materials for constructing engineering safety barriers for radioactive waste disposal, special radioactive waste placement sites during their conservation, and nuclear facilities during their decommissioning by on-site disposal option. In order to extent requirements of federal rules and regulations in the field of atomic energy use related to ensuring long-term safety of radioactive waste disposal, the authors have formulated safety functions performed by engineering safety barriers based on barrier clay materials. To ensure the possibility of justifying the choice of barrier clay materials as well as safety functions performed by engineering safety barriers, the authors have defined the list of indicators that must be measured, standardized and controlled during the design and construction of engineering safety barriers based on barrier clay materials. The substantiation of the necessary and sufficient indicators of barrier clay materials to ensure the long-term safety of radioactive waste disposal sites is presented, that includes:

• characteristics of the composition, structure and indicators of properties of barrier clay materials;
• functional properties of barrier clay materials composing the engineering safety barriers;
• technological indicators of barrier clay materials and engineering safety barriers based on them.

Proposals on classification of these indicators are provided, which can become the basis for the standardization and quality control of barrier clay materials.

► Keywords: barrier clay materials, engineering safety barriers, radioactive waste disposal, safety functions, indicators and characteristics, quality control.

Article language: Russian. Pp. 36–57. [in Russian]. DOI: 10.26277/SECNRS.2024.114.4.003.