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Information × Registration Number 0221U100559, 0116U005097 , R & D reports Title Development and research of radiation- and corrosive-resistance ceramic materials for the decision of problems of isolation of liquid radioactive wastes of APS of Ukraine popup.stage_title Head Saienko Serhii Yu., Registration Date 07-01-2021 Organization National Science Center "Kharkiv Institute of Physics and Technology" popup.description2 Samples of potassium-magnesium-phosphate (PMP) matrix, as perspective material for radioactive waste immobilization, were prepared by synthesis method at room temperature. The experimental tests were carried out and it was shown that their mechanical strength and resistance to leaching in an aqueous medium is higher than that of a cement matrix. The possibility of using phosphate matrices for the immobilization of high-level waste (lava-like fuel-containing materials (LFCM) of the Shelter of the ChNPP) for their further deep geological removal is considered. Using mathematical modeling (based on a non-stationary differential equation of diffusion for a multilayer cylinder), a comparative computational analysis of the intensity of the release of cesium and other radionuclides into the geological massif from the tunnels of an underground storage was carried out using three different methods of immobilization of LFCM: - immobilization of LFCM in a potassium-magnesium-phosphorus matrix;  vitrification of LFCM;  cementing of LFCM. It was shown that the use of a phosphorus matrix provides a significantly lower rate of entry of radionuclides from a deep storage into the surrounding geological massif compared to a cement matrix, which ultimately increases the ecological safety of the disposal of hazardous radioactive substances.   Product Description popup.authors popup.nrat_date 2021-03-17 Close