Abstract
A Lagrangian atmospheric dispersion model combining a three dimensional prognostic sea‐land breeze model has been developed and applied to the analysis of mesoscale atmospheric dispersion of radiological releases from the nuclear power plants in mountainous coastal regions. The hydrostatic primitive equations in the terrain‐following coordinate system were used in the sea‐land breeze model, and a Markov chain process and a kernel density estimator were used in the Lagrangian particle dispersion model. In this study, the mesoscale atmospheric circulation and particle dispersion simulations around the Wolsung nuclear power site located on the east coastline of Korea were carried out for two synoptic weather conditions on a clear day in summer by using the developed models. The simulated results showed that the atmospheric dispersions were affected by wind directions of sea breeze and land breeze according to synoptic weather conditions. And the simulated results have very good agreement with the observations.
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