Numerical Study on Oxygen Transport Characteristics in Liquid Lead-Bismuth Eutectic Circuit

Liang Ruixian; Yang Lingfeng; Wang Yifeng; Li Xiaobo; Niu Fenglei

doi:10.13832/j.jnpe.2022.06.0187

Volume 43 Issue 6

Dec. 2022

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Liang Ruixian, Yang Lingfeng, Wang Yifeng, Li Xiaobo, Niu Fenglei. Numerical Study on Oxygen Transport Characteristics in Liquid Lead-Bismuth Eutectic Circuit[J]. Nuclear Power Engineering, 2022, 43(6): 187-194. doi: 10.13832/j.jnpe.2022.06.0187

Citation:

Liang Ruixian, Yang Lingfeng, Wang Yifeng, Li Xiaobo, Niu Fenglei. Numerical Study on Oxygen Transport Characteristics in Liquid Lead-Bismuth Eutectic Circuit[J]. Nuclear Power Engineering, 2022, 43(6): 187-194. doi: 10.13832/j.jnpe.2022.06.0187

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Numerical Study on Oxygen Transport Characteristics in Liquid Lead-Bismuth Eutectic Circuit

doi: 10.13832/j.jnpe.2022.06.0187

School of Nuclear Science and Technology, North China Electric Power University, Beijing, 102206, China

Received Date: 2021-12-07
Rev Recd Date: 2022-06-08
Publish Date: 2022-12-14

Abstract

Abstract

In order to study the oxygen transport characteristics of the cover gas in a gaseous oxygen control device of liquid lead-bismuth eutectic (LBE) coolant system--expansion tank, the numerical calculation of oxygen transport was carried out by ANSYS Fluent software using computational fluid dynamics (CFD). According to the flow characteristics of the cover gas and the characteristics of low oxygen partial pressure in the gas mixture, the gas-phase space of expansion tank was simplified, the gas-liquid interface was regarded as the free surface boundary with constant oxygen concentration, and the oxygen concentration in liquid LBE after mass transfer between gas and liquid LBE was calculated by component transport model. The results show that the mass transfer coefficient increases with the increase of liquid LBE inlet velocity. When the inlet velocity of liquid LBE increases, the intensity of gas-liquid convection in the expansion tank increases, which is beneficial to enhance the oxygen transport in the expansion tank. The higher the LBE temperature in the expansion tank, the greater the average mass transfer coefficient of oxygen transport. When the liquid LBE inlet velocity is constant, the average mass transfer coefficient can be expressed as an increasing function of temperature. Within the saturated oxygen concentration threshold, the inlet oxygen concentration and the oxygen concentration at the gas-liquid interface do not affect the mass transfer coefficient of the expansion tank, which is beneficial for oxygen concentration control of liquid LBE circuit. In this study, the operating conditions for the liquid LBE circuit to be in a reasonable range of oxygen concentration were obtained quantitatively, which provided data reference for experiment and system design.
- Liquid lead-bismuth eutectic (LBE),
- Oxygen transport,
- Gaseous oxygen control,
- Computational fluid dynamics (CFD),
- Component transport model

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References(22)

References

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