LOCAL SYSTEMS ENABLING THE CONCEPT OF SEPARATE COLLECTION AND PROCESSING OF LIQUID RADIOACTIVE MEDIUM AT NPP WITH WWER REACTOR UNITS

The study shows that the engineering methods applied in radioactive waste (RW) processing are mainly focused on long-term compact storage of accumulated RW inventory at the industrial sites of NPPs. Therefore, the RW should be additionally treated to obtain a final product that would meet the final disposal acceptance criteria. The transition from liquid radioactive effluent mixing practice to its separate collection and processing at purpose-designed local units with relatively low productive capacity will enable selective concentration and separation of biologically hazardous components. The paper presents physical and chemical features of the sorption concentration processes, coprecipitation of radionuclides and the containment of boron-containing and nitrogen-containing chemical waste being considered typical for nuclear power plants.

 

Keywords: radioactive waste, liquid radioactive waste, radioactive concentrates, separate processing of radioactive waste, ionselective inorganic sorbents.