Abstract: A steam power plant is shown which comprises a pressurized deaerating feed water tank, a high-pressure steam boiler, a high-pressure steam turbine, a low-pressure steam turbine, and a water-cooled, steam condenser, connected in series in a closed circuit. The condenser is maintained under a substantial pressure during operation and connected to supply feed water to the feed water tank. A steam-operated deaerator is connected to the feed water tank to remove air from the water therein. A steam jet is connected between and operable to move steam from the low-pressure turbine to the condenser. A steam jet is connected between and operable to move water from the condenser to the deaerator. A second steam jet is connected to the deaerator to provide steam to scrub the oxygen from the incoming water and permit introduction of a secondary steam source to provide heat as needed. A high-pressure, water injector is connected between and operable to move water from the feed water tank to the boiler.