METHOD FOR LIQUID RADIOACTIVE WASTE REPROCESSING

摘要

The inventive methods are used for liquid radioactive waste (LRW) reprocessing by immobilizing radionuclides into a crystal material. Said methods consist in the synthesizing of insoluble compounds which immobilise long-livid radionuclides. The insoluble compounds in the form of salts or oxides arc synthesised in hydrothermal conditions in a flow by passing LRWs being processed and reagents required for the synthesis through a layer of the insoluble particles at a speed enabling synthesizable radionuclide-containing compounds to be crystallized on the surface of the particles of the layer. Said insoluble particles are embodied in the form of metal oxides, for example, iron, manganese, cobalt, zirconium oxides or salts, for example, hydroxylapatite. The hydrothermal synthesis is carried out at a temperature range from 180°C to 250°C and a pressure range from 20 to 150 atm.