Three dimensional numerical simulation of field tracer experiment for atmospheric dispersion around a domestic nuclear power plant
WANG Bo1, LUAN Hai-yan1, WU Han1, XIONG Wen-bin1, CHEN Lu1, HE Wei1, ZHANG Qiong1, YAN Jiang-yu2, HAO Hong-wei2
1. Nuclear and Radiation Safety Center, Ministry of Environmental Protection, Beijing 100082, China; 2. China Institute for Radiation Protection, Taiyuan 030006, China
Abstract:To further analyze the characteristics of atmospheric dispersion around a domestic coastal nuclear power plant on the basis of field tracer experiments, Fluidyn-PANACHE, a Computational Fluid Dynamics (CFD) software, was used to create a refined atmospheric dispersion simulation system that is capable of simulating field tracer experiment. More reasonable simulation for tracer's peak concentration and plume width at each downwind sampling arc, closer to real dispersion status at near field with undulate terrain, and approximate real time simulation under continuous variation of wind direction based on the steady simulation can be obtained by CFD mode compared to Gaussian mode. The statistical analysis for bias of numerical simulations indicated that both the statistical performance indices of CFD steady simulation and Gaussian simulation were within internationally accepted ranges and moreover, random bias of CFD simulation was superior to that of Gaussian simulation. It was concluded that CFD simulation can be utilized to assist and optimize field tracer experiments for other nuclear power plants so as to improve efficiency and pertinence of nuclear safety regulation.
王博, 栾海燕, 吴晗, 熊文彬, 陈鲁, 何玮, 张琼, 闫江雨, 郝宏伟. 核电厂野外示踪试验的三维数值模拟研究[J]. 中国环境科学, 2016, 36(10): 2950-2956.
WANG Bo, LUAN Hai-yan, WU Han, XIONG Wen-bin, CHEN Lu, HE Wei, ZHANG Qiong, YAN Jiang-yu, HAO Hong-wei. Three dimensional numerical simulation of field tracer experiment for atmospheric dispersion around a domestic nuclear power plant. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(10): 2950-2956.
Jeong H, Kim E, Park M, et al. Numerical simulation of air pollutant dispersion using an in situ tracer experiment at a nuclear site [J]. Annals of Nuclear Energy, 2014,73:1-6.
Zhang Q, Guo R P, Zhang C M, et al. Radioactive airborne effluents and the environmental impact assessment of CAP1400 nuclear power plant under normal operation [J]. Nuclear engineering and design, 2014,280:579-585.
[4]
Suh K S, Han M H, Jung S H, et al. Three-dimensional numerical modeling of pollutant transport at local-scale complex terrain [J]. Annals of Nuclear Energy, 2008,35:1016-1023.
[5]
Zhang X L, Su G F, Chen J G, et al. Iterative ensemble Kalman filter for atmospheric dispersion in nuclear accidents: An application to Kincaid tracer experiment [J]. Journal of Hazardous Materials, 2015,297:329-339.
[6]
U.S. Nuclear Regulatory Commission. Methods for estimating atmospheric transport and dispersion of gaseous effluents in routine discharges from Light-Water-Cooled Reactors [S]. Regulatory Guide, 1.111, Washington, D.C, 1977.
[7]
U.S. Nuclear Regulatory Commission. Atmospheric dispersion models for potential accident consequence assessments at nuclear power plants [S]. Regulatory Guide 1.145, Washington, D.C, 1986.
[8]
Hanna S R, Chang J C, Strimaitis D G. Hazardous gas model evaluation with field observations [J]. Atmospheric Environment, 1993,27(15):2265-2285.
Tominaga Y. Flow around a high-rise building using steady and unsteady RANS CFD: Effect of large-scale fluctuations on the velocity statistics [J]. Journal of Wind Engineering and Industrial Aerodynamics, 2015,142:93-103.
Transoft-Int. PANACHE User Manual, version 4.0.7 [R]. Paris, Saint-Denis, 2010.
[13]
Hanna S R. Air quality model evaluation and uncertainty [J]. Journal of the Air Pollution Control Association, 1988,38:406-412.
[14]
Hanna S R. Uncertainties in air quality model predictions [J]. Boundary-Layer Meterology, 1993,62:3-20.
[15]
Chang J C, Hanna S R. Air quality model performance evaluation [J]. Meteorology and Atmospheric Physics, 2004,87:167-196.
[16]
Mazzoldi A, Hill T, Colls J J. CFD and Gaussian atmospheric dispersion models: A comparison for leak from carbon dioxide transportation and storage facilities [J]. Atmospheric Environment, 2008,42(34):8046-8054.
U.S. Environmental Protection Agency. Reference for Fluidyn- PANACHE in Appendix W to Part51- Guideline on air quality models [R]. Washington, D.C, 1998.