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http://dx.doi.org/10.1016/j.net.2020.11.014

A study on the dynamic characteristics of the secondary loop in nuclear power plant  

Zhang, J. (Shaanxi Key Lab. of Advanced Nuclear Energy and Technology, Xi'an Jiaotong University)
Yin, S.S. (Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China)
Chen, L. (Shaanxi Key Lab. of Advanced Nuclear Energy and Technology, Xi'an Jiaotong University)
Ma, Y.C. (Shaanxi Key Lab. of Advanced Nuclear Energy and Technology, Xi'an Jiaotong University)
Wang, M.J. (Shaanxi Key Lab. of Advanced Nuclear Energy and Technology, Xi'an Jiaotong University)
Fu, H. (Shaanxi Key Lab. of Advanced Nuclear Energy and Technology, Xi'an Jiaotong University)
Wu, Y.W. (Shaanxi Key Lab. of Advanced Nuclear Energy and Technology, Xi'an Jiaotong University)
Tian, W.X. (Shaanxi Key Lab. of Advanced Nuclear Energy and Technology, Xi'an Jiaotong University)
Qiu, S.Z. (Shaanxi Key Lab. of Advanced Nuclear Energy and Technology, Xi'an Jiaotong University)
Su, G.H. (Shaanxi Key Lab. of Advanced Nuclear Energy and Technology, Xi'an Jiaotong University)
Publication Information
Nuclear Engineering and Technology / v.53, no.5, 2021 , pp. 1436-1445 More about this Journal
Abstract
To obtain the dynamic characteristics of reactor secondary circuit under transient conditions, the system analysis program was developed in this study, where dynamic models of secondary circuit were established. The heat transfer process and the mechanical energy transfer process are modularized. Models of main equipment were built, including main turbine, condenser, steam pipe and feedwater system. The established models were verified by design value. The simulation of the secondary circuit system was conducted based on the verified models. The system response and characteristics were investigated based on the parameter transients under emergency shutdown and overload. Various operating conditions like turbine emergency shutdown and overspeed, condenser high water level, ejector failures were studied. The secondary circuit system ensures sufficient design margin to withstand the pressure and flow fluctuations. The adjustment of exhaust valve group could maintain the system pressure within a safe range, at the expense of steam quality. The condenser could rapidly take out most heat to avoid overpressure.
Keywords
Dynamic characteristics; The secondary loop; Turbine; Condenser;
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