Analysis and treatment of high vibration flash alarm of condensate pump motor

Excessive vibration of the pump motor may cause equipment damage, performance degradation, increased noise, and structural looseness, seriously affecting its normal operation and service life. This paper elaborates on the analysis and treatment process of the high vibration flash alarm of the condensate pump motor in a nuclear power plant (NPP). First, the vibration flash alarm phenomenon is briefly introduced and the preliminary cause analysis is conducted; secondly, based on the preliminary cause analysis, corresponding treatment is carried out from three aspects: the equipment body, system piping, and installation instability. However, since the vibration fluctuation and flash alarm problems still existed, the root cause of the problem was further analyzed. Finally, the vibration flash alarm problem was successfully solved by installing a cantilever mass absorber. This article can be used as a reference for the maintenance and management of condensate water pump equipment in power plants of the same industry.