The S6G reactor is a naval reactor used by the United States Navy to provide electricity generation and propulsion on Los Angeles-class attack submarines.
The S6G reactor plant consists of the reactor coolant, steam generation, and other support systems that supply steam to the engine room.
[1] The Los Angeles-class engine room also contains the steam turbines that generate electricity and drive the propeller shaft.
Design and operational support for the S6G is provided by Knolls Atomic Power Laboratory (KAPL).
All Los Angeles-class submarines from USS Providence (SSN-719) on were built with a D2W core.