1.Key Laboratory of Pressure Systems and Safety, Ministry of Education, East China University of Science & Technology, Shanghai 200237, China
2.Shanghai Nuclear Engineering Research & Design Institute, State Power Investment Corporation, Shanghai 200233, China
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Yan-Bin Liu, Xiang-Yu Meng, Xue-Sheng Wang, et al. Transient analysis and optimization of passive residual-heat removal heat exchanger in advanced nuclear power plant. [J]. Nuclear Science and Techniques 33(8):106(2022)
Yan-Bin Liu, Xiang-Yu Meng, Xue-Sheng Wang, et al. Transient analysis and optimization of passive residual-heat removal heat exchanger in advanced nuclear power plant. [J]. Nuclear Science and Techniques 33(8):106(2022) DOI： 10.1007/s41365-022-01083-1.
The transient performance and optimization of a passive residual-heat removal heat exchanger (PRHR HX) were investigated. First, a calculation method was developed for predicting the heat transfer of the PRHR HX. The calculation results were validated through comparisons with ROSA experimental data. The heat-transfer performance of the AP1000 PRHR HX in the initial period was predicted, and it satisfied the design requirements. Second, the distributions of the heat flux, tube-inside/outside heat-transfer coefficients, and heat load for the AP1000 PRHR HX over 2000 s were examined. Third, an optimization study was conducted by adjusting the horizontal length and tube diameter. Their effects on the four main heat-transfer parameters and the heat-transfer area were analyzed. Furthermore, the influence of the initial in-containment refueling water storage tank (IRWST) temperature was investigated using an established simulation procedure. The results indicated that it significantly affected the trends of the IRWST temperature and reactor outlet temperature. Finally, the minimum required flow rates over time to maintain the reactor outlet temperature at the safety line were determined for different start-up times. The trends of the minimum required flow rate and the peak flow rate were analyzed.
Heat transferPRHR HXTransient analysisOptimization investigation
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