radiological dose assessment by means of a coupled wrf-hysplit model under normal operation of bushehr nuclear power plant

The current paper uses wrf model to generate meteorological fields for hysplit dispersion model. sensitivity and validation of the wrf model has been conducted via different combinations of physical parameterization schemes. for this purpose, eight different configurations have been examined, with the predictions of wrf, assessed by computing statistical parameters, such as correlation coefficient (cc) and root mean square error (rmse). for instance, wrf results show that utilization of proper physical configuration in bushehr syoptic station on 03/01/2005 leads to cc=0.82007 and rmse=1.91783 for wind speed parameter. once wrf model has been properly configurated, dispersion simulations and annual effective dose for adult age group are carried out by wrf-hysplit coupled model under normal conditions for bushehr power plant. according to the coupled model, simulated annual effective dose for adult age group has been 5.8e-08 sv/yr, 6.7e-08 sv/yr, and 1.1e-07 sv/yr for the years 2014, 2015, and 2016, respectively. results show that simulation and prediction of effective dose with coupled wrf-hysplit model have been in good agreement with observations, indicating the validity of the simulations. the ratio of predicted annual effective dose to dose limit (1e-04 sv/yr) for normal operation is below 0.2%, showing that annual exposure dose for normal operation of bushehr power plant has been negligible, compared to the legal limit.