S4G reactor

{{Short description|Naval reactor used by the United States Navy}}

File:USS_Triton_SSN586.jpg

The S4G reactor is a naval pressurized water reactor used by the United States Navy to provide electricity generation and propulsion on warships. The S4G designation stands for:

• S = Submarine platform
• 4 = Fourth generation core designed by the contractor
• G = General Electric was the contracted designer

This nuclear reactor is the shipboard equivalent of the S3G reactor. It was installed in a dual-configuration on {{USS|Triton|SSRN-586|6}} with two reactors and two five-blade propellers, which was the first ship to make a submerged circumnavigation of the world. As installed in USS Triton the two S4G's were rated for a combined {{convert|78|MW|hp|abbr=on}}.{{cite web| title = S4G Reactor| url =

https://www.globalsecurity.org/military/systems/ship/systems/s4g.htm| accessdate =2023-07-18}}