S3W reactor

The S3W reactor is a naval reactor used by the United States Navy to provide electricity generation and propulsion on warships. The S3W designation stands for:

S = Submarine platform
3 = Third generation core designed by the contractor
W = Westinghouse was the contracted designer

This nuclear reactor was a variant of the Submarine Fleet Reactor (SFR), an advance on the pressurized water reactor (PWR) plant design employed on the USS Nautilus (SSN-571). The S3W plant utilized horizontal U-tube steam generators. This concept developed into vertical U-tube steam generators in the S5W reactor plant, and is in common use today on commercial PWR power plants.

The USS Halibut (SSGN-587) and the four Skate class boats were built with S3W reactors: USS Skate (SSN-578) , USS Swordfish (SSN-579) , USS Sargo (SSN-583) , and USS Seadragon (SSN-584) . USS Swordfish (SSN-579) and USS Seadragon (SSN-584) had the S3W reactor installed in the S4W reactor plant, which was an alternate arrangement of the same components.

References

United States Naval Reactors

Aircraft carrier	A1W A2W A3W A4W A1B

Cruiser	C1W

Destroyer	D1G D2G

Submarine	S1C S1G S1W S2C S2G S2W S2Wa S3G S3W S4G S4W S5G S5W S6G S6W S7G S8G S9G S1B

List of United States Naval reactors

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