Failure analysis of socket weld in nuclear power station and its countermeasures

Qin Yin

doi:10.1117/12.2635293

25 April 2022 Failure analysis of socket weld in nuclear power station and its countermeasures

Qin Yin

Proceedings Volume 12244, 2nd International Conference on Mechanical, Electronics, and Electrical and Automation Control (METMS 2022); 122442H (2022) https://doi.org/10.1117/12.2635293
Event: 2nd International Conference on Mechanical, Electronics, and Electrical and Automation Control (METMS 2022), 2022, Guilin, China

Abstract

Socket welds are widely used for small diameter pipelines in nuclear power plants due to their ease of assembly and welding. However, feedbacks show that a large number of failures caused by vibration have occurred in the welds, which clearly demonstrates that their ability to resist high cycle fatigue is particularly weak. After failure analysis, from the view of engineering practice and application, the countermeasures are put forward and discussed, including adopting butt weld instead of socket weld in the construction stage of the new unit, implementing vibration diagnosis and treatment measures, carrying out proactive reinforcement by overlay, and using phased array UT for in-service supervision.

Citation Download Citation

Qin Yin "Failure analysis of socket weld in nuclear power station and its countermeasures", Proc. SPIE 12244, 2nd International Conference on Mechanical, Electronics, and Electrical and Automation Control (METMS 2022), 122442H (25 April 2022); https://doi.org/10.1117/12.2635293

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