Analysis of Thermal Stress and Fatigue Induced by Dryout Oscillation in Once Through Steam Generator

Chen Ling; Wang Xinming; Zhang Yongfa; Zhang Liming; Jiang Lizhi; Jiao Meng; Liu Xiaoya

doi:10.13832/j.jnpe.2023.04.0121

Volume 44 Issue 4

Aug. 2023

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Chen Ling, Wang Xinming, Zhang Yongfa, Zhang Liming, Jiang Lizhi, Jiao Meng, Liu Xiaoya. Analysis of Thermal Stress and Fatigue Induced by Dryout Oscillation in Once Through Steam Generator[J]. Nuclear Power Engineering, 2023, 44(4): 121-127. doi: 10.13832/j.jnpe.2023.04.0121

Citation:

Chen Ling, Wang Xinming, Zhang Yongfa, Zhang Liming, Jiang Lizhi, Jiao Meng, Liu Xiaoya. Analysis of Thermal Stress and Fatigue Induced by Dryout Oscillation in Once Through Steam Generator[J]. Nuclear Power Engineering, 2023, 44(4): 121-127. doi: 10.13832/j.jnpe.2023.04.0121

Citation:

Chen Ling, Wang Xinming, Zhang Yongfa, Zhang Liming, Jiang Lizhi, Jiao Meng, Liu Xiaoya. Analysis of Thermal Stress and Fatigue Induced by Dryout Oscillation in Once Through Steam Generator[J]. Nuclear Power Engineering, 2023, 44(4): 121-127. doi: 10.13832/j.jnpe.2023.04.0121

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Analysis of Thermal Stress and Fatigue Induced by Dryout Oscillation in Once Through Steam Generator

doi: 10.13832/j.jnpe.2023.04.0121

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

Received Date: 2022-08-16
Rev Recd Date: 2023-02-21
Publish Date: 2023-08-15

Abstract

Abstract

In order to study the damage of the heat transfer tube caused by dryout oscillation, the once through steam generator designed by Babcock&Wilcox company is taken as a prototype. Firstly, the relevant thermal and hydraulic parameters are obtained by using the method of primary and secondary side coupled heat transfer. By comparing the radial temperature distribution of dryout point at different fluctuation frequencies, the influence of fluctuation frequency was determined, and the stress distribution of heat transfer tubes was obtained by finite element analysis. Finally, the fatigue of heat transfer tubes was evaluated according to S-N curve, and the influence of related factors was discussed. The results show that when the fluctuation frequency of the drying point is low, the radial temperature distribution is similar to the steady state. The outer wall in contact with the secondary side is more prone to fatigue damage, although the alternating stress is less than the limit value, there is a certain operating risk in the reactor environment. The increase of temperature fluctuation frequency will lead to the obvious decrease of the life of heat transfer tubes, and the use of elastic constraint is helpful to alleviate the fatigue caused by the oscillation of steam drying point. This study provides a reference for the life prediction and safe operation of the heat transfer tubes of once-through steam generator under the condition of fluctuating evaporating point.
- Heat transfer tube,
- Dryout oscillation,
- Wall temperature,
- Fatigue analysis

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References(17)

References

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