NATURALLY OCCURRING RADIONUCLIDE <sup>210</sup>PO IN THE BLACK SEA MOLLUSCS
210Po accumulation by five species of the Black Sea molluscs inhabiting the Sevastopol bays was studied. 210Ро concentrations in investigated mollusks vary widely and depend on the type of their nutrition. The highest concentration was found in the Far-Eastern giant oyster and the lowest one - in nana. 210Po accumulation by the Black Sea mussels depends on their individual wet weight (WW), the stages of maturity of the gonads and inhabitancy condition. Such dependences were found for the Far-Eastern giant oyster. Concentration Factors (CF) of 210Po for the Black Sea molluscs vary from 7x10 3 to 5.2x10 4. This is in good agreement with World Ocean average value for 210Po CF for molluscs which equals 3x10 4.