The Absorbed Dose Rate of Internal Irradiation of Fish in the Water Bodies of the Chornobyl Exclusion Zone at the Present Stage |Biomedgrid

Changes in the radioecological situation for representatives of the ichthyofauna in the reservoirs of the Chornobyl Exclusion Zone (ChEZ) are of significant scientific interest. We investigated aquatic bodys with different levels of radionuclide contamination and hydrological regime: Vershyna Lake and Hlyboke Lake, the conditionally non-flowing Yaniv backwater of the Pripyat River, one of the reservoirs that formed in the former north-western part of the water area of the ChNPP Cooling Pond (CP) after the water level decreased, as well as channel section of the Pripyat River (near Chornobyl town). The main objects of the study were fish species that differ in the type of nutrition: silver Prussian carp (Carassius gibelio Bloch), rudd (Scardinius erythrophthalmus L.), bleak (Alburnus alburnus L.), sanbleak (Leucaspius delineatus Heckel), perch (Perca fluviatilis L.) and pike (Esox luceus L.). The paper presents the results of calculating the power of the absorbed dose of ionizing radiation of fish due to radionuclides 90Sr and 137Cs incorporated in tissues as of 2021. The value of the power of the internal dose was determined using the ERICA Assessment Tool 1.0 software [1]. Averaged data for each type of fish were used for calculations. The age of the fish was 2–8 years. Absorbed radiation dose rate for fish was measured in μGy/h.