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The S2Wa reactor is a naval reactor used by the United States Navy to provide electricity generation and propulsion on warships. The S2Wa designation stands for:
After pressurized water reactor technology had proved its superiority in the S1W and S2W applications, the USS Seawolf (SSN-575) had her S2G liquid metal cooled reactor replaced using spare S2W components. During the conversion, the steam turbines in the powerplant were also re-bladed to utilize saturated, rather than superheated, steam.
