Abstract: Based on Yangjiang sea area, Chebyshev spectral method was used to calculate the tidal velocities and sea levels, and particle random walk model was adopted to simulate the concentration distribution of radionuclide ³H from liquid effluent of Yangjiang nuclear power plants. The calculated results show that the concentration of radionuclide ³H is smaller than 0.70 Bq/L near Hailing Island in Yangjiang sea area, which is coincident with the measured value 0.97 Bq/L in October 2015. The result indicates that there is no obvious impact on the Yangjiang sea area due to liquid effluent from Yangjiang nuclear power plants.

Key words: calculated simulation, liquid effluent, Yangjiang nuclear power plants