KEPCO Journal on Electric Power and Energy

Korea Electric Power Corporation (한국전력공사)
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Failure Analysis of Circulating Water Pump Shaft in Power Plant

발전 계획에서 순환 물 펌프 고장 분석

  • Lee, Jaehong (KEPCO Research Institute, Korea Electric Power Corporation) ;
  • Jung, Nam-gun (KEPCO Research Institute, Korea Electric Power Corporation)
  • Received : 2020.03.02
  • Accepted : 2020.09.10
  • Published : 2021.06.30
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Abstract

This paper presents the root cause failure analysis of the circulating water pump in the 560 MW thermal power plant. A fractured austenitic stainless-steel shaft operated for 24 years was examined. Fracture morphology was investigated by micro and macro-fractographic analysis. The metallurgical analyses including chemical analysis, metallography and hardness testing were performed. The analysis reveals that the pump shaft was fractured due to the reverse bending load with combination of rotating bending load. Corrective actions for plant operator was recommended based on the analysis.

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References

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