An Extended FMEA Model for Exploring the Potential Failure Modes: A Case Study of a Steam Turbine for a Nuclear Power Plant

Table 5

Top six FMs as well as the inspection and maintenance measures for them.

Ranking	FMi	Failure mode	Inspection and maintenance measures
1	FM9	Rotor breakdown	Monitor the vibration and temperature of bearings and perform nondestructive inspections on a regular basis to ensure that there is no degradation of the components.
2	FM4	Fracture of vane	Set standard operating hours and perform regular inspections of turbine vanes.
3	FM3	Foreign objects	Implement a foreign material exclusion (FME) control system.
4	FM2	Clogged lubricating oil system	Regular cleaning or replacement of related devices. In addition, the quality of the lubricating oil must be monitored and tested regularly.
5	FM6	Bearing damage	Regular maintenance, inspection, and replacement of bearings with lubricating oil.
6	FM8	Mechanical transmission breakdown	Monitor the speed and vibration of the machinery and perform nondestructive tests on a regular basis.