基于拉格朗日方法的核素近海迁移计算

根据实时气象数据，建立了某核电厂近海域水动力模型；基于拉格朗日方法，建立核电厂近海域核素扩散模型，验证了模型的可靠性，分析了核电厂近海域水动力特征和核素迁移路径。结果表明:核电厂近海域水动力模拟结果较好地刻画了核电厂近海域半日潮的潮汐潮流现象；放射性核素的基本迁移方向是从核电厂开始，沿着海岸向东北方向扩散；受潮流影响，核素在旋转中前进；表层核素贴着沿岸迁移，迁移距离最近，中层核素距离沿岸较远，迁移距离最远，底层核素迁移距离介于表层核素与底层核素之间。 

Calculation of Radionuclide Migration in Coastal Waters Based on Lagrangian Method

Based on the real-time meteorological data, the hydrodynamic model in the coastal waters of the nuclear power plant was established and the model reliability was verified. Then a radionuclide diffusion model in the coastal waters of the nuclear power plant was established based on the Lagrange method. The hydrodynamic characteristics and radionuclide migration in the coastal waters of nuclear power plants were analyzed. The results show that the simulation hydrodynamic results in the coastal waters of the nuclear power plant can well depict the semi-diurnal tides in the coastal waters of the nuclear power plant. The basic radionuclide migration direction is from the nuclear power plant, along the coast, to the northeast direction. Influenced by the tidal current, the radionuclides advance in rotation. The surface radionuclides migrate along the coast with the shortest distance, and the middle radionuclides migrate with the farthest distance, and the bottom radionuclides migrate with the distance between surface and bottom radionuclides.