Experimental and numerical investigation on the pressure pulsation in reactor coolant pumps under different inflow conditions

Huang Song; Song Yu; Yin Junlian; Xu Rui; Wang Dezhong

doi:10.1016/j.net.2022.12.023

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자료유형: 학술저널

저자정보: Huang Song (Shanghai Jiao Tong University) Song Yu (Shanghai Jiao Tong University) Yin Junlian (Shanghai Jiao Tong University) Xu Rui (Shanghai Jiao Tong University) Wang Dezhong (Shanghai Jiao Tong University)

저널정보: 한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제55권 제4호

발행연도: 2023.4

수록면: 1,310 - 1,323 (14page)

DOI: 10.1016/j.net.2022.12.023

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A reactor coolant pump (RCP) is essential for transporting coolant in the primary loop of pressurized water reactors. In the advanced passive reactor, the absence of a long pipeline between the steam generator and RCP serves as a transition section, resulting in a non-uniform flow field at the pump inlet. Therefore, the characteristics of the pump should be investigated under non-uniform flow to determine its influence on the pump. In this study, the pressure pulsation characteristics were examined in the time and frequency domains, and the sources of low-frequency and high-amplitude signals were analyzed using wavelet coherence analysis and numerical simulation. From computational fluid dynamics (CFD) results, non-uniform inflow has a great effect on the flow structures in the pump's inlet. The pressure pulsation in the pump at the rated flow increased by 78–128.7% under the non-uniform inflow condition in comparison with that observed under the uniform inflow condition. Furthermore, a low-frequency signal with a high amplitude was observed, whose energy increased significantly under non-uniform flow. The wavelet coherence and CFD analysis verified that the source of this signal was the low-frequency pulsating vortex under the steam generator.

#Reactor coolant pump #Pressure pulsation #Non-uniform inflow #Wavelet coherence analysis #CFD

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