| 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
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| 通讯作者 | Liu, Xiaoming([email protected])
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| 发表期刊 | NUCLEAR ENGINEERING AND DESIGN
 |
| 2023-12-15
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| 卷号 | 415页码:17 |
| ISSN | 0029-5493
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| 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. |
| 关键词 | Control rod drop
Annular gap flow
Eccentricity effect
Added mass
Hydrodynamic characteristics
Dynamic mesh technique
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| DOI | 10.1016/j.nucengdes.2023.112744
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| 收录类别 | SCI
; EI
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| 语种 | 英语
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| WOS记录号 | WOS:001153284400001
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| 关键词[WOS] | COOLED FAST-REACTOR
; DRIVE MECHANISM
; NUMERICAL-SIMULATION
; SAFETY ROD
; PERFORMANCE
; VIBRATION
; CYLINDERS
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| WOS研究方向 | Nuclear Science & Technology
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| WOS类目 | Nuclear Science & Technology
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| 资助项目 | National Natural Science Foundation of China[12022210]
; National Natural Science Foundation of China[12032001]
; Youth Innovation Promotion Association CAS[2018022]
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| 项目资助者 | National Natural Science Foundation of China
; Youth Innovation Promotion Association CAS
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| 论文分区 | 二类
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| 力学所作者排名 | 1
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| RpAuthor | Liu, Xiaoming
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| 引用统计 |
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| 文献类型 | 期刊论文
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| 条目标识符 | http://dspace.imech.ac.cn/handle/311007/94223
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| 专题 | 非线性力学国家重点实验室
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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.Rp_Au:Liu, Xiaoming
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| 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.
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| 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.
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