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http://dx.doi.org/10.1016/j.net.2021.05.023

Development and verification of PWR core transient coupling calculation software  

Li, Zhigang (Nuclear Power Institute of China)
An, Ping (Nuclear Power Institute of China)
Zhao, Wenbo (Nuclear Power Institute of China)
Liu, Wei (Nuclear Power Institute of China)
He, Tao (Nuclear Power Institute of China)
Lu, Wei (Nuclear Power Institute of China)
Li, Qing (Nuclear Power Institute of China)
Publication Information
Nuclear Engineering and Technology / v.53, no.11, 2021 , pp. 3653-3664 More about this Journal
Abstract
In PWR three-dimensional transient coupling calculation software CORCA-K, the nodal Green's function method and diagonal implicit Runge Kutta method are used to solve the spatiotemporal neutron dynamic diffusion equation, and the single-phase closed channel model and one-dimensional cylindrical heat conduction transient model are used to calculate the coolant temperature and fuel temperature. The LMW, NEACRP and PWR MOX/UO2 benchmarks and FangJiaShan (FJS) nuclear power plant (NPP) transient control rod move cases are used to verify the CORCA-K. The effects of burnup, fuel effective temperature and ejection rate on the control rod ejection process of PWR are analyzed. The conclusions are as follows: (1) core relative power and fuel Doppler temperature are in good agreement with the results of benchmark and ADPRES, and the deviation between with the reference results is within 3.0% in LMW and NEACRP benchmarks; 2) the variation trend of FJS NPP core transient parameters is consistent with the results of SMART and ADPRES. And the core relative power is in better agreement with the SMART when weighting coefficient is 0.7. Compared with SMART, the maximum deviation is -5.08% in the rod ejection condition and while -5.09% in the control rod complex movement condition.
Keywords
PWR; Core transient coupling calculation; Rod ejection; Fuel effective temperature;
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