摘要
应用非结构化网格MIKE 21水动力模型及对流扩散模块,针对某滨海核电厂工程海域建立液态流出物排放数学模型,对核电厂运营期间液态流出物中核素在等浓度排放条件下4种不同典型潮时(涨憩、落急、落憩、涨急)起始的间歇排放进行数值模拟,并与连续排放进行比较,给出了不同工况下液态流出物在环境水域中全潮平均相对浓度分布及影响范围、不同半径海域内核素的平均相对浓度以及取水相对浓度特征值。对比分析显示,滨海核电液态流出物在受纳水体中的输移、扩散主要受潮流影响。落急时刻起始的间歇排放方式总体上在环境影响和取水浓度方面均具有显著优势。计算结果可为核电厂液态流出物排放方式的优化及海洋环境影响评价提供了依据。
A numerical model for discharge of liquid effluent from a coastal nuclear power plant is established by using MIKE 21 Hydrodynamic model with transport module in an unstructured grid.Numerical simulations of transport and diffusion of liquid effluent with non-decaying nuclide are carried out with different scenarios of the intermittent discharge starting at the four typical tidal moments respectively,in addition to a comparison with continuous discharge under the condition of equal discharge concentration.The mean concentration distribution,impact areas of liquid effluent in the sea water and characteristic values of intake concentration in different scenarios are given.The comparative analysis indicate that the transport and diffusion process of liquid effluent from the coastal nuclear power plant is mainly affected by tidal current.The intermittent discharge starting at the moment of ebb strength has significant advantages in respect of environmental impact and intake concentration.The calculated results can provide technical support for the optimization of liquid effluent discharge mode and marine environmental impact assessment.
作者
张海文
纪平
赵懿珺
陈小莉
曾利
ZHANG Haiwen;JI Ping;ZHAO Yijun;CHEN Xiaoli;ZENG Li(China Institute of Water Resources and Hydropower Research,Beijing 100038)
出处
《辐射防护》
CAS
CSCD
北大核心
2024年第1期71-79,共9页
Radiation Protection
关键词
数值模拟
液态流出物
间歇排放
连续排放
海洋环境影响
numerical model
liquid effluent
intermittent discharge
continuous discharge
marine environmental impact
