Eccentric drop of a control rod in the guide tube with annular gap flow

doi:10.1016/j.nucengdes.2023.112744

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	Eccentric drop of a control rod in the guide tube with annular gap flow
	Liu J(刘俊); He, Luyao; Peng Q(彭青); Chen, Xiaodong; Liu XM(刘小明); Wei, Yueguang
刊名	NUCLEAR ENGINEERING AND DESIGN
	2023-12-15
卷号	415 页码:17
关键词	Control rod drop Annular gap flow Eccentricity effect Added mass Hydrodynamic characteristics Dynamic mesh technique
ISSN号	0029-5493
DOI	10.1016/j.nucengdes.2023.112744
通讯作者	Liu, Xiaoming(xiaomingliu@imech.ac.cn)
英文摘要	The drop time of control rod is essential for safety analysis of nuclear power plant. The motion of control rod can be characterized by an annular gap flow with large blockage ratio. In this study, we studied the effects of the eccentricity between the control rod and the guide tube on the annular gap flow, and further on the drop time. By considering the added mass and the upward flow of fluid in the annular gap, we developed a theoretical model for computing the drop time of eccentric rod. In the proposed model, particularly, the annular gap flow velocity was obtained from full-scale computational fluid simulations with respect to blockage ratio and eccentricity. The simulation and experiment results agree well on the drop time, the histories of velocity and acceleration, and the hydrodynamic characteristics. Results show that the drop time increases drastically when blockage ratio alpha increases from 0.83 to 0.91, and the eccentricity effect on drop time is negligible when the blockage ratio is small (e.g., alpha < 0.83). Nevertheless, for large blockage ratio (alpha >= 0.83), the drop time increases significantly for eccentric rod drop, especially for a lighter control rod. The present study provides a general method for analysis of control rod drop, which is critical for the nuclear reactor design.
分类号	二类
资助项目	National Natural Science Foundation of China[12022210] ; National Natural Science Foundation of China[12032001] ; Youth Innovation Promotion Association CAS[2018022]
WOS关键词	COOLED FAST-REACTOR ; DRIVE MECHANISM ; NUMERICAL-SIMULATION ; SAFETY ROD ; PERFORMANCE ; VIBRATION ; CYLINDERS
WOS研究方向	Nuclear Science & Technology
语种	英语
WOS记录号	WOS:001153284400001
资助机构	National Natural Science Foundation of China ; Youth Innovation Promotion Association CAS
其他责任者	Liu, Xiaoming
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/94222]
专题	力学研究所_非线性力学国家重点实验室
推荐引用方式 GB/T 7714	Liu J,He, Luyao,Peng Q,et al. Eccentric drop of a control rod in the guide tube with annular gap flow[J]. NUCLEAR ENGINEERING AND DESIGN,2023,415:17.
APA	刘俊,He, Luyao,彭青,Chen, Xiaodong,刘小明,&Wei, Yueguang.(2023).Eccentric drop of a control rod in the guide tube with annular gap flow.NUCLEAR ENGINEERING AND DESIGN,415,17.
MLA	刘俊,et al."Eccentric drop of a control rod in the guide tube with annular gap flow".NUCLEAR ENGINEERING AND DESIGN 415(2023):17.