Matrix for Isolation of Technetium and Actinides

Radioactive waste of nuclear power engineering is a considerable environmental hazard. Liquid highly radioactive waste (HRW) of irradiated nuclear fuel reprocessing is most hazardous. Such HRW with com� plex chemical composition is solidified into glassy confinement matrices to improve its storage safety [1]. For this purpose, aluminophosphate glasses are used in Russia and borosilicate glasses are applied in other countries. Such glasses are chosen because of the sim� plicity of industrial production and high solubility of many elemental substances from HRW in them. At the same time, there are some doubts in the longevity of their properties. The glass will crystallize, especially on heating accompanying the decay of Cs and Sr iso� topes. This increases the rate of leaching of radionu� clides from such matrices and, thus, the hazard of these radionuclides. First of all, this concerns actinides and some of their fission products, for exam� ple,