Research Of Interannual And Intra-Annual Atmospheric Boundary Layer Dispersion Variability Parameters In The NPP Site Vicinity.

[摘要] The threat to human health is largely determined by the level of air pollution with chemical andradioactive components. Therefore, identification of the pollutants dispersion conditions in the atmosphericboundary layer (ABL) is of great importance in establishing the engineering protection of territories. In manyrespects, it concerns the nuclear power plants (NPPs) siting areas where automated radiation monitoringsystems are installed. In particular, the ABL monitoring is carried out in such areas. When analyzing andpredicting the radiation situation in the NPP site vicinities, it is essential to determine the variability ofatmospheric dispersion parameters over time. This research is aimed at assessing the interannual and intra- annual atmospheric dispersion parameters variability in the NPP siting areas based on the monitoring data.Taking the Belorussian NPP as an example, the relative interannual stability of the main average annualatmospheric dispersion parameters (vertical temperature gradient, wind speed and direction) was revealedduring the 2015-2018 observation period. At the same time, the average seasonal values of the dispersionparameters are characterized by significant fluctuations thereof during the annual course. The prospects of theABL status monitoring for other potentially hazardous industrial facilities, such as thermal power plants andchemical plants, are also noted.

[学科分类] 工程和技术（综合）

[关键词] air pollution;atmospheric dispersion;radiation safety;environmental safety;nuclear power plant;monitoring;atmospheric boundary layer.