When should the MFP turning gear be in operation?

The MFP (Main Feed Pump) turning gear should be in operation prior to startup and during cooldown before shutdown. This practice is essential because the turning gear helps ensure that the pump's rotor remains lubricated and is gradually warmed up to operating conditions, which prevents thermal shock and mechanical stress that could occur if the rotor were to start moving cold.

By operating the turning gear before the pump is engaged, it allows for smoother startup conditions, reducing the risk of equipment damage. Similarly, during cooldown, the turning gear helps maintain uniform temperature distribution, further protecting the components from thermal stress as they transition back to a lower temperature.

This proactive operation is fundamental in maintaining the integrity and longevity of the pump, ensuring it operates efficiently and reliably.