Radiation and Chemical Stability of a Magnesium-Phosphate Matrix for 14C Immobilization

Chemical Technologies for Closing the Nuclear Fuel Cycle

“…This indicates that the use of synthetic analogs of minerals as matrices for immobilization of radioactive waste is promising. Breakthrough results in recent years [29][30][31] were obtained in the study of the possibility of using crystalline double orthophosphate of magnesium and potassium (MPP) as synthetic matrices for long-term and environmentally safe storage (or disposal) of liquid radioactive waste, including actinide-containing waste. The synthesis of the MPP matrix occurs in an aqueous solution according to the reaction The nonthermal process (room temperature, atmospheric pressure) of obtaining MPP matrices is similar to cementing and is characterized by low energy consumption, ease of implementation, and mobility of the curing process, and the simplicity of the hardware design of the method leads to minimization of "secondary" radioactive waste.…”