基于拉格朗日方法的核素近海迁移计算  

Calculation of Radionuclide Migration in Coastal Waters Based on Lagrangian Method

作　　者：李子超[1,2,3] 周涛 司广成[4] 秦雪猛 Li Zichao;Zhou Tao;Si Guangcheng;Qin Xuemeng(School of Nuclear Science and Engineering,North China Electric Power University,Beijing,102206,China;Institute of Nuclear Thermal-hydraulic Safety and Standardization,North China Electric Power University,Beijing,102206,China;Beijing Key Laboratory of Passive Safety Technology for Nuclear Energy,North China Electric Power University,Beijing,102206,China;Institute of Oceanology,Chinese Academy of Sciences,Qingdao,266071,China)

机构地区：[1]华北电力大学核科学与工程学院,北京102206 [2]华北电力大学核热工安全与标准化研究所,北京102206 [3]非能动核能安全技术北京市重点实验室,北京102206 [4]中国科学院海洋研究所,青岛266071

出　　处：《核动力工程》2020年第2期72-77,共6页Nuclear Power Engineering

基　　金：国家重点研发计划:核电站泄漏放射性核素在邻近海域的动态迁移和衰减规律研究(2016YFC1402501)。

摘　　要：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。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.

关 键 词：核泄漏事故 拉格朗日方法 核素 近海域 迁移 

分 类 号：X591[环境科学与工程—环境工程] X55