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 ›› 2009, Vol. 20 ›› Issue (2): 118-123 doi: 10.13538/j.1001-8042/nst.20.118-123

• NUCLEAR ENGINEERING • Previous Articles     Next Articles

Mitigating check valve slamming and subsequentwater hammer events for PPFS using MOC

TIAN Wenxi1 SU Guanghui1,* WANG Gaopeng1 QIU Suizheng1 XIAO Zejun2   

  1. 1 State Key Laboratory of Multiphase Flow in Power Engineering, Department of Nuclear Science and Technology, Xi’an Jiaotong University, Xi’an 710049, China 2 National Key Laboratory of Bubble Physics & Natural Circulation, Nuclear Power Institute of China, Chengdu 610041, China
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TIAN Wenxi, SU Guanghui, WANG Gaopeng, QIU Suizheng, XIAO Zejun. Mitigating check valve slamming and subsequentwater hammer events for PPFS using MOC.Nuclear Science and Techniques, 2009, 20(2): 118-123     doi: 10.13538/j.1001-8042/nst.20.118-123


The method of characteristic (MOC) was adopted to analyze the check valve-induced water hammer behaviors for a Parallel Pumps Feedwater System (PPFS) during the alternate startup process. The motion of check valve disc was simulated using inertial valve model. Transient parameters including the pressure oscillation, local flow velocity and slamming of the check valve disc etc. have been obtained. The results showed that severe slamming between the valve disc and valve seat occurred during the alternate startup of parallel pumps. The induced maximum pressure vibration amplitude is up to 5.0 MPa. The scheme of appending a damping torque to slow down the check valve closing speed was also performed to mitigate of water hammer. It has been numerically approved to be an effective approach.

Key words: Water hammer, Check valve slamming, Method of characteristic, Inertia-type valve model