[en] For estimation of zoogenic radionuclide export from the emergency ChNPP area the following aspects were studied: biomass of dry land animals withing the 30 km area; radionuclide amount in zoomass of settled animals; annual radionuclide export by migrants, a collective dose for a direct take-in way by people. It is revealed that a major part of radionuclides is dispersed to the south and south-east of the accident place. Annual export does not exceed a Curie unit. The upper value of radiocesium absorbed by a man with bird's meat (ducks) was up to 0.1 Ci/yr, the lower value was up to 1400 BER. refs. 7; tabs. 6

[en] Evaluation of the zoogenic transfer of radionuclides from the 30-km zone around the Chernobyl NPP was necessary because of the enormous heavily polluted territory and mighty flow of migratory birds who tended to large rivers, the Dnieper and Pripyat. The integral estimate of the transferred amount was obtained as a product of three variables: the transfer factor (0.0077 m²/kg for ¹³⁷Cs; 0.00107 m²/kg for ⁹⁰Sr), the density of birds (0.002 kg/m², at the mass of migrants about 5000 t per year), and the total fund of radionuclides throughout the territory