What happens during the engagement of the MFP turning gear?

During the engagement of the main feedwater pump turning gear, the turning gear motor automatically starts to ensure the turbine rotates slowly. This slow rotation is crucial for several reasons, primarily to distribute lubricant evenly, minimize thermal stress, and prevent potential damage to the turbine bearings and other components.

The operation of the turning gear is critical during periods when the turbine is not in operation, helping to keep internal components moving and properly lubricated. This engagement is part of the standard safety and maintenance protocol in power plant operations, ensuring the turbine is ready for service without the risk of overheating or other mechanical failures.

Thus, the initiation of the turning gear motor is an essential action that ensures the longevity and reliability of the turbine system.