Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2016, Vol. 27 ›› Issue (4): 91 doi: 10.1007/s41365-016-0078-6

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Influence of injection temperature and flow rate on mixing and stratification in small passively cooling enclosures

Wei-Qian Zhuo, Feng-Lei Niu , Jun-Chi Cai, Xiao-Wei Su, Ying-Qiu Hu, Yun-Gan Zhao, Yu Yu   

  1. Beijing Key Laboratory of Passive Nuclear Power Safety and Technology, North China Electric Power University, Beijing 102206, China
  • Contact: Feng-Lei Niu E-mail:niufenglei@ncepu.edu.cn
  • Supported by:

    This work was supported by National Natural Science Foundation of China (No. 91326108).

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Wei-Qian Zhuo, Feng-Lei Niu,Jun-Chi Cai, Xiao-Wei Su, Ying-Qiu Hu, Yun-Gan Zhao, Yu Yu. Influence of injection temperature and flow rate on mixing and stratification in small passively cooling enclosures.Nuclear Science and Techniques, 2016, 27(4): 91     doi: 10.1007/s41365-016-0078-6
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Abstract:

Thermal mixing and stratification phenomena may occur during the loss of a coolant accident or main steam line break accident in the containment of a Passive Containment Cooling System, or in the suppression pools in BWR. However, the present study pays insufficient attention to the thermal stratification phenomena in the containment of small modular reactors (SMR). In this paper, an investigation on the mixing and thermal stratification phenomena caused by the plumes or buoyant jets in SMR containments was carried out. The experiments were both conducted under non-adiabatic and adiabatic conditions for a steel containment. In each condition, two key parameters, inlet temperature, and flow rate were tested by controlling variables to identify their influence on the thermal stratification phenomenon. The visualization experiments illustrated the jet mixing and stratification development. The experiment results were compared with the numerical computation and they reached a good agreement.

Key words: Mixing and thermal stratification,  SMR , Visualization experiments,  Numerical computation