The STF N700 turbine offers a robust architecture in which the steam first expands in a double-flow HP path. After moisture separation and reheat, it then expands in four or six LP flows. The turbine rotors are rigidly coupled to each other and to the generator rotor, and each rotor is supported by a pair of journal bearings.
The HP model is derived from the most powerful 3,000 rpm saturated steam turbines in operation in the U.K. and China and features impulse-type blading and six stages to increase both global efficiency and final power output. HP steam exhausts are connected to the moisture separator reheater (MSR) by four cross-under pipes. This design allows servicing of the turbine without needing to disassemble the exhaust pipes.
Including cutting-edge blading technology adapted to any backpressure conditions, the STF N700 turbine can feature two or three LP modules for enhanced vacuum fit.
Specifications shown are 50 Hz
|Typical Reactor Output||1,500-2,200 MWth|
|Shaft Line Rotational Speed||3,000|
|HP/HIP Turbine Type||50NH2F07|
|Number of LP Turbines||3|
|Last Stage Blade Length in Inches (“)||39|
|Configuration||Double flow HP|
|LP Turbine Type||LP41|
|Heaviest Lift – LP Rotor (tons)||85|
|Power Train Width (m)||17|
|Hook Height (m)||15|
|Power Train Length including Generator (m)||53|