S4W reactor

The S4W reactor is a naval reactor plant used by the United States Navy to provide electricity generation and propulsion on warships. The S4W designation stands for:


 * S = Submarine platform
 * 4 = Fourth generation core designed by the contractor
 * W = Westinghouse was the contracted designer

This nuclear reactor plant utilized an S3W reactor in an alternate equipment arrangement.

Two boats of the Skate class were built with S4W reactor plants: USS Swordfish (SSN-579) and USS Seadragon (SSN-584).