RADIATION PROTECTION ›› 2023, Vol. 43 ›› Issue (2): 145-154.

Previous Articles     Next Articles

Effects of different atmospheric stability classification and diffusion parameter schemes on CALPUFF simulation results and a turbulence fitting scheme

BAO Xinjie1, YANG Zongzhen1, TAO Naigui1, ZHANG Xiaofeng1, WANG Yichuan2   

  1. 1. Suzhou Nuclear Power Research Institute, Jiangsu Suzhou 215004;
    2. Nuclear and Radiation Safety Center, MEE, Beijing 102445
  • Received:2021-12-23 Online:2023-03-20 Published:2023-05-11

Abstract: The numerical simulation results of three diffusion parameter schemes in CALPUFF model under different atmospheric stability conditions are verified by tracer tests at a coastal nuclear power plant site. The results show that the simulation effect of the measured turbulence scheme is less affected by the classification results of atmospheric stability, and the comprehensive evaluation result is the best. Under the condition that the classification results of atmospheric stability simulated by the model are consistent with those based on the measured data of the weather tower. And the simulation results of the micrometeorological scheme are slightly worse than that of the measured turbulence scheme, and are better than that of the PG scheme. Under the adverse weather conditions that the EIA focuses, the simulated results of the micrometeorological or PG scenarios may differ from the actual concentration distribution results. In order to solve the problem that it is difficult to obtain long-term measured turbulence data, the measured data of meteorological tower used for classification of atmospheric stability and the turbulence observation data of corresponding period were fitted, and the standard deviation equation of turbulence pulsation under various atmospheric stability conditions was constructed. The statistical results show that the fitting turbulence scheme combined with the atmospheric stability index has a good simulation effect, which has a certain practical significance for improving the atmospheric diffusion simulation effect for nuclear power plants.

Key words: CALPUFF, atmospheric stability, tracer test, atmospheric diffusion parameter, turbulence observation

CLC Number: 

  • X169