THERMOCHEMICAL CONDITIONING OF RADIOACTIVE WASTE: STRUCTURE AND PROPERTIES OF FINAL PROCESSED PRODUCT

摘要

Thermochemical processing method is based on utilization of energy of chemical reactions between components of special exothermic mixtures (termed heat base) to melt radioactive waste and form a vitreous melt after cooling of which a durable monolith product is formed in which radionuclides are fixed. Compositions were studied, structure and properties of final products of thermochemical treatment of ash residue from incineration of solid radioactive waste, spent inorganic ion exchangers (e.g. clinoptililite and silica gel), contaminated clay and sand-based soils. Investigations showed that matrix material is dominantly amorphous and on complies to basic requirements to solidified radioactive waste of medium level of activity.