ANALYSIS OF CHARACTERISTICS OF RADIOACTIVE RELEASES FROM NPP WITH VARIOUS TYPES OF REACTORS DURING NORMAL OPERATION AS WELL

System analysis was conducted to examine the atmospheric emissions from Russian nuclear power plants with various types of reactors during normal operation, as well as the emissions for design and beyond-design accident scenarios. Through many years of study, the main radionuclides that contribute to the total activity were identified. The composition of emissions from postulated accidents at the boiling water reactor (BWR) and pressurized water reactor (PWR) has been analyzed. The obtained results are considered as initial data for calculating the dose load on the population from NPP releases and formation of lists of the main dose-forming radionuclides. The necessary components of such calculations are models parameterized on regional data. Ranking in the system “radionuclide – environmental component” is considered as an important stage for developing the Regulation for Environmental Monitoring of the NPP location area.