Abstract
Assessment of the activity of radioactive waste (RW) stored in the tanks of the BN-350 reactor facility is necessary to ensure safe storage and to support the selection of appropriate waste management technologies. This is one of the key elements of the radiation safety system, ensuring proper classification, safe storage, and subsequent disposal of radioactive materials. Within the framework of this study, the specific activity of liquid radioactive waste (LRW) immobilized using sorbents was evaluated based on gamma radiation for the years 2025, 2050, and 2075. The concentrations of the major long-lived radionuclides were determined for the same periods. The specific mass fraction of fissile materials in the radioactive waste was also calculated. The object of the study is liquid radioactive waste solidified using sorbents such as perlite, agrovermiculite, and superabsorbent. The results may be used to select appropriate sorbents for further radioactive waste management operations.