Experimental Research on Effect of Nuclear Feedback on Flow Instability in Parallel Channels

Xie Feng; Xi Zhao; Yang Zumao

doi:10.13832/j.jnpe.2018.02.0005

Volume 39 Issue 2

Feb. 2025

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Xie Feng, Xi Zhao, Yang Zumao. Experimental Research on Effect of Nuclear Feedback on Flow Instability in Parallel Channels[J]. Nuclear Power Engineering, 2018, 39(2): 5-9. doi: 10.13832/j.jnpe.2018.02.0005

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Xie Feng, Xi Zhao, Yang Zumao. Experimental Research on Effect of Nuclear Feedback on Flow Instability in Parallel Channels[J]. Nuclear Power Engineering, 2018, 39(2): 5-9. doi: 10.13832/j.jnpe.2018.02.0005

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Experimental Research on Effect of Nuclear Feedback on Flow Instability in Parallel Channels

doi: 10.13832/j.jnpe.2018.02.0005

CNNC Key Laboratory on Nuclear Reactor Thermal Hydraulics Technology, Nuclear Power Institute of China, Chengdu, 610213, China

Received Date: 2017-04-20
Rev Recd Date: 2018-01-10

Available Online: 2025-02-09

Abstract

Abstract

As the existence of nuclear feedback in nuclear reactors,coupled nuclear-thermo-hydraulic instability will occur in the reactor.Coupled-nuclear-thermal-hydraulic instabilities were investigated employing experimental and theoretical methods in this paper.The experimental research on coupled nuclear-thermo-hydraulic instability in parallel channels was performed and the effect of the nuclear feedback on flow instability has been studied.The experiment is carried out with and without nuclear coupled respectively,and the effect of void reactivity coefficient and temperature reactivity coefficient on characteristic and boundaries of flow instability has been studied.Based on the experimental data,the tendency of the characteristics of effect is analyzed,and the stability boundaries is obtained.The results from the research in this paper show that:void reactivity coefficient,temperature reactivity coefficient and fuel time constant have a significant effect on characteristics and boundaries of flow instability.
- Nuclear feedback,
- Parallel channels,
- Flow instability

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