Numerical Simulation of Turbulent Mixing of LBE between Sub-Channels of Wire-Wrapped Fuel Assembly

Wang Jingjie; Zhu Dahuan; Lu Tao; Deng Jian; Cai Rong

doi:10.13832/j.jnpe.2021.05.0030

Volume 42 Issue 5

Sep. 2021

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Wang Jingjie, Zhu Dahuan, Lu Tao, Deng Jian, Cai Rong. Numerical Simulation of Turbulent Mixing of LBE between Sub-Channels of Wire-Wrapped Fuel Assembly[J]. Nuclear Power Engineering, 2021, 42(5): 30-35. doi: 10.13832/j.jnpe.2021.05.0030

Citation:

Wang Jingjie, Zhu Dahuan, Lu Tao, Deng Jian, Cai Rong. Numerical Simulation of Turbulent Mixing of LBE between Sub-Channels of Wire-Wrapped Fuel Assembly[J]. Nuclear Power Engineering, 2021, 42(5): 30-35. doi: 10.13832/j.jnpe.2021.05.0030

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Numerical Simulation of Turbulent Mixing of LBE between Sub-Channels of Wire-Wrapped Fuel Assembly

doi: 10.13832/j.jnpe.2021.05.0030

Wang Jingjie^1
,,
Zhu Dahuan²,
Lu Tao^{1
,
,},
Deng Jian²,
Cai Rong²

1.
College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing,100029, China
2.
Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu, 610213, China

Received Date: 2020-09-03
Rev Recd Date: 2021-05-21
Publish Date: 2021-09-30

Abstract

Abstract

The lead-bismuth eutectic (LBE) is a candidate coolant for the fourth generation liquid metal reactors. In view of its special thermophysical properties, its flow and heat transfer process in the fuel assembly sub-channels need to be studied. For this purpose, the authors conduct numerical simulation and analysis of the turbulent flow of the LBE in the wire-wrapped fuel assembly, and compare the numerical simulation results of the wall temperature of fuel rods with the experimental data for response. The simulation results agree well with the experimental data, indicating that the mathematical model and numerical results are highly reliable and accurate. The authors also characterize the turbulent mixing of LBE between different sub-channels at different values of the ratio of spacing between fuel rods to the fuel rod diameter (S/D), using the turbulent mixing coefficient β. The characterization results show that the fluctuation of β between different sub-channels varies and that the β value is negatively correlated with the S/D. Based on different calculation results of the S/D and Renolyd number, the correlation formula for the β between different sub-channels is obtained by fit. It provides a turbulent mixing model for the development of a sub-channel analysis code of fuel assembly consisting of wire-wrapped fuel rods arranged in triangular form.
- LBE,
- Turbulent mixing,
- Wire-wrapped fuel assembly,
- Sub-channel analysis

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References(9)

References

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