Influence of Inlet and Outlet Resistance on the Characteristics of Backflow in Inverted U-tube Bundle

Ma Songyang; Li Mingrui; Chen Wenzhen; Hao Jianli; Xiao Hongguang; Ye Lei

doi:10.13832/j.jnpe.2022.02.0053

Volume 43 Issue 2

Apr. 2022

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Ma Songyang, Li Mingrui, Chen Wenzhen, Hao Jianli, Xiao Hongguang, Ye Lei. Influence of Inlet and Outlet Resistance on the Characteristics of Backflow in Inverted U-tube Bundle[J]. Nuclear Power Engineering, 2022, 43(2): 53-58. doi: 10.13832/j.jnpe.2022.02.0053

Citation:

Ma Songyang, Li Mingrui, Chen Wenzhen, Hao Jianli, Xiao Hongguang, Ye Lei. Influence of Inlet and Outlet Resistance on the Characteristics of Backflow in Inverted U-tube Bundle[J]. Nuclear Power Engineering, 2022, 43(2): 53-58. doi: 10.13832/j.jnpe.2022.02.0053

Citation:

Ma Songyang, Li Mingrui, Chen Wenzhen, Hao Jianli, Xiao Hongguang, Ye Lei. Influence of Inlet and Outlet Resistance on the Characteristics of Backflow in Inverted U-tube Bundle[J]. Nuclear Power Engineering, 2022, 43(2): 53-58. doi: 10.13832/j.jnpe.2022.02.0053

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Influence of Inlet and Outlet Resistance on the Characteristics of Backflow in Inverted U-tube Bundle

doi: 10.13832/j.jnpe.2022.02.0053

College of Nuclear Science and Technology, Naval University of Engineering, Wuhan, 430033, China

Received Date: 2021-02-04
Accepted Date: 2021-11-29
Rev Recd Date: 2021-09-26
Publish Date: 2022-04-02

Abstract

Abstract

The inverted U-tube bundle backflow problem of the steam generator (SG), which increases the flow resistance of SG under natural circulation conditions and reduces the natural circulation capacity of the system, has a negative impact on reactor safety. In view of the above problems, taking the marine SG as the research object, the flow distribution and backflow characteristics of the tube plate before and after the improvement scheme are studied by using the methods of theoretical analysis and computational fluid dynamics (CFD) numerical simulation and by rounding the tube plate opening in the parallel inverted U-tube bundle. The results show that by rounding the tube plate opening of the short tube, the flow resistance of SG can be effectively reduced and the flow distribution of the short tube can be increased under the natural cycle condition, so as to reduce the critical flow of backflow and delay the occurrence of backflow. The research conclusion provides a feasible solution for the backflow problem in the SG inverted U-tube bundle, and can provide support for the research on solving the backflow problem.
- Inverted U-tube,
- Natural circulation,
- Inlet and outlet resistance,
- Single-phase backflow

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References(16)

References

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