放射性核素在长江三角洲的迁移扩散模拟  

Simulation of Radionuclide Migration and Diffusion in Yangtze River Delta

作　　者：崔志强 曲静原[1] 童节娟[1] CUI Zhiqiang;QU Jingyuan;TONG Jiejuan(Institute of Nuclear and New Energy Technology,Tsinghua University,Beijing 100084,China)

机构地区：[1]清华大学核能与新能源技术研究院,北京100084

出　　处：《原子能科学技术》2020年第12期2469-2475,共7页Atomic Energy Science and Technology

摘　　要：本文针对拟建的内陆核电站,选择二维数值模拟,基于MIKE模型构建长江河口二维水动力模型,模拟了受纳水体的流场及假想事故情况下放射性液态流出物在长江三角洲的稀释扩散情况。本文评估了在潮汐作用的影响下,核事故污染物在长江三角洲的滞留时间、影响过程和影响程度。模拟结果显示:模拟的流场基本能反映受纳水域实际情况,潮汐作用会增加核素在三角洲水域的滞留时间,但同时也会将放射性核素带向外海,核素浓度会逐渐降低。A two-dimensional numerical model was selected for the proposed inland nuclear power plant in this paper.The two-dimensional hydrodynamic model of the Yangtze River estuary was constructed based on the MIKE model.The flow field of receiving water and the diffusion of radioactive liquid effluent in the Yangtze River delta under a hypothetical accident were simulated.The detention time,process and extent of radioactive contamination in the Yangtze River delta under tidal action were evaluated.The simulation results show that it could basically reflect the actual situation of receiving water.Tidal action will increase the detention time of nuclides in delta waters,but it will also bring radionuclides to the outer sea,and the nuclide concentration will gradually decrease.

关 键 词：内陆核电站 放射性液态流出物 长江三角洲 迁移扩散模型 

分 类 号：TL732[核科学技术—辐射防护及环境保护]