Izvestiya vuzov. Yadernaya Energetika

The peer-reviewed scientific and technology journal. ISSN: 0204-3327

Modeling Technology of the Radioactive Pollutants Propagation in Densely Built and Populated Areas

6/30/2025 2025 - #02 Environmental aspects of nuclear power

Tsarina A.G. Aleksanyan E.G. Khachturova L.M. Stogova I.V. Freimundt G.N.

DOI: https://doi.org/10.26583/npe.2025.2.09

UDC: 504.61:351.78:614.8:61/69

The article considers an operational forecasting system of radionuclides transport and scattering due to accidental release to the surrounding atmosphere in the urban areas. The software package implementing the modeling of the radioactive pollutants concentration fields over urbanized territories based on specific meteorological data and known sources of pollution is described. To carry out calculations, a chain of calculation modules is being built. It includes preprocessing step, which ensures the preparation of computational domain with optimized building geometry and a digital elevation model. The processing phase aims to build three-dimensional wind fields with surrounding buildings taken into account, it also has procedures to simulate pollution transfer and to obtain fields of volumetric pollutants concentrations. Wind fields are calculated using the discrete vortex method and the mass-consistent model based on variational methods. The application of these two approaches for different scales has been proven to be effective. The postprocessing subsystem makes it possible to visualize the calculation results and present them in the form of tables, plots, diagrams and animated pictures. The data received during testing stage of the main software modules is compared with the materials of field and computational experiments published in the scientific literature. In particular, wind velocity fields were compared and diffusion experiments were considered, and good consistency of results is obtained. The results of applying the software package to solve problems of determining the shape of a cloud during emergency contamination over the concrete urban area and to assess the integral radiation impact of the pollutants of the emergency release are shown.

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operational model propagation of radioactive impurities densly built area wind field radiation pollution impact assessment

Link for citing the article: Tsarina A.G., Aleksanyan E.G., Khachturova L.M., Stogova I.V., Freimundt G.N. Modeling Technology of the Radioactive Pollutants Propagation in Densely Built and Populated Areas. Izvestiya vuzov. Yadernaya Energetika. 2025, no. 2, pp. 100-113; DOI: https://doi.org/10.26583/npe.2025.2.09 (in Russian).

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