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《Engineering Journal of Wuhan University》 2013-01
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Numerical simulation research on impact of low-level liquid radwaste of nuclear power plant on a reservoir

YANG Yinqun1,2,TU Jianfeng3,XU Gaohong4,WANG Yonggui1,ZHANG Wanshun1(1.School of Resources and Environmental Science,Wuhan University,Wuhan 430079,China; 2.Changjiang Water Resources Protection Institute,Changjiang Water Resources Commission,Wuhan 430051,China; 3.Yangtze River Water Resources Protection Bureau,Wuhan 430010,China; 4.Bureau of Hydrology,Changjiang Water Resources Commission,Wuhan 430010,China)  
Researching on the migration and diffusion of the low-level liquid radwaste of nuclear power plants in the receiving water bodies is of great importance to environment protection.Considering the hydrodynamic convection-diffusion processes and the deposition/decay process of the nuclides,a three-dimensional numerical model is developed to describe the transport processes of radionuclide in a reservoir.The model is used to simulate three-dimensional distribution of the nuclide along the river under different discharge conditions,hydrological conditions and water levels of the reservoir.The results show that,the shape of dilution ratio envelope is narrow and long in flood season,wide and short in dry season.After outflow,the low-level liquid radwaste mixed quickly with environment water,5 times dilution ratio envelope does never appear in any calculation scheme.When the upstream water level of the dam is 145 m and 155 m,the sphere of influence by the low-level liquid radwaste is largest at the middle layer of the reservoir;while 175 m,the sphere of influence is largest at the bottom layer.The maximum relative concentration at downstream 500 m of outfall in dry season is 0.009 52 and the stability times of dilution ratio to each depth-layer are 20 d.
【Fund】: 国家水体污染控制与治理科技重大专项(编号:2009ZX07528-003)
【CateGory Index】: X771
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