Последовательность действий при пуске:

Start of auxiliary systems
Warm up of steam lines
Opening of stop-valves
Opening of control valves
Leaving turning gear
Steam turbine roll-off
Time Steam turbine start-up time
Closing of
by-pass stations
Reaching rated condition

И ещё в одном фрагменте:

As a standard a minimum temperature of 20°C (68°F) of all steam turbine rotors is mandatory at roll-off.
Roll-off at lower rotor temperatures is possible with some restrictions. Roll-off at lower rotor temperatures must be approved by the steam turbine seller individually for each turbine.

Или я настолько не соображаю в технике :(