Why is it important to use MFP turning gear prior to startup?

Using the MFP (Main Feed Pump) turning gear prior to startup is essential for ensuring even turbine rotor heating. The turning gear allows for the slow rotation of the turbine rotor, which helps distribute heat uniformly across the rotor components. This initial slow rotation mitigates the risk of thermal stresses and potential deformation that could occur if the rotor heats up unevenly, leading to mechanical failures or damage when the turbine is brought online.

By preemptively rotating the rotor, you help ensure that all parts of the turbine reach operational temperatures in a synchronized manner, resulting in improved reliability and performance during startup. This practice is a critical part of maintaining the longevity and safety of turbine operations.