THEORETICAL ASSESSMENT OF PUBLIC RADIATION BURDEN BY ATMOSPHERIC EMISSIONS UNDER NORMAL NPP OPERATING CONDITIONS

This paper presents the results of a theoretical assessment of public radiation burden by atmospheric emissions from NPP during the first year of operation and after 30 years of operation under normal conditions. Radiation burdens were estimated given the following exposure pathways of the human body: internal exposure through inhalation of radionuclides, external exposure to a cloud, external exposure to ground contamination and internal exposure to the intake of foodstuffs. It was found by calculation that when a NPP is operated under normal conditions, quotas for the permissible public radiation burden (10 µSv/year) generated by emissions of radioactive gases and aerosols into the atmosphere will not be exceeded. The main contribution to the total public radiation burden is made by external photon exposure to a radioactive cloud. The total dose through all exposure pathways resulting from atmospheric emissions increases over time due to the accumulation of long-lived radionuclides in environmental compartments, for which reason, after 30 years of NPP operation under normal conditions, the total dose of ⁶⁰Со and ⁹⁰Sr will increase by one mathematical order of magnitude. 

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