List of United States Naval reactors is a comprehensive annotated list of all

naval reactors Naval Reactors (NR), also known as the Naval Nuclear Propulsion Program, is an umbrella term for the U.S. government office that has comprehensive responsibility for the safe and reliable operation of the United States Navy's nuclear propulsion p ...

designed, built, or used by the

United States Navy The United States Navy (USN) is the maritime service branch of the United States Armed Forces and one of the eight uniformed services of the United States. It is the largest and most powerful navy in the world, with the estimated tonnage ...

Reactor designations

Each

nuclear reactor A nuclear reactor is a device used to initiate and control a fission nuclear chain reaction or nuclear fusion reactions. Nuclear reactors are used at nuclear power plants for electricity generation and in nuclear marine propulsion. Heat fr ...

design is given a three-character designation consisting of a letter representing the type of ship the reactor is intended for, a consecutive generation number, and a letter indicating the reactor's designer. Ship types: * "A" – aircraft carrier * "C" – cruiser * "D" – destroyer * "S" – submarine Contracted designers: * "B" – Bechtel * "C" –

Combustion Engineering Combustion Engineering (C-E) was a multi-national American-based engineering firm that developed nuclear steam supply power systems in the United States. Originally headquartered in New York City, C-E moved its corporate offices to Stamford, Connec ...

* "G" –

General Electric General Electric Company (GE) is an American multinational conglomerate founded in 1892, and incorporated in New York state and headquartered in Boston. The company operated in sectors including healthcare, aviation, power, renewable en ...

* "W" – Westinghouse

Nuclear reactors of the United States Navy

Naval reactors of the United States Navy, listed alphabetically by ship type.

Aircraft carrier reactors

A1W reactor The A1W reactor is a prototype nuclear reactor used by the United States Navy to provide electricity generation and propulsion on warships. The A1W designation stands for: * A = Aircraft carrier platform * 1 = First generation core designed by ...

** land-based prototype for USS ''Enterprise'' (CVN-65); located at

Naval Reactors Facility The Naval Reactors Facility (NRF) is located 52 miles northwest of Idaho Falls, Idaho. The NRF is a United States Department of Energy-Naval Reactors facility where three nuclear propulsion prototypes A1W, S1W and S5G were located. It is contra ...

A2W reactor The A2W reactor is a naval nuclear reactor used by the United States Navy to provide electricity generation and propulsion on warships. The A2W designation stands for: * A = Aircraft carrier platform * 2 = Second generation core designed by the ...

** *

A3W reactor The A3W reactor was a naval reactor used by the United States Navy to provide electricity generation and propulsion on warships. Like all operational U.S. naval reactors it was a pressurized water reactor (PWR) design. The A3W designation stands ...

** designed for , but never installed * A4W reactor ** s * A1B reactor ** s

Cruiser reactors

C1W reactor The C1W reactor is a nuclear reactor used by the United States Navy to provide electricity generation and Nuclear marine propulsion, propulsion on warships. C1W reactors, like all United States Naval reactors, are pressurized water reactors. The ...

** ''Long Beach''-class cruiser

Destroyer reactors

* D1G reactor ** land-based prototype for ''Bainbridge''-class cruiser; located at the Kesselring site *

D2G reactor The D2G reactor was a naval reactor used by the United States Navy from 1962 to provide propulsion and electricity generation on warships. Ships powered by the reactor were decommissioned at around the end of the 20th century. The D2G designation ...

** ''Bainbridge''-class cruiser ** ''Truxtun''-class cruiser ** ''California''-class cruiser ** ''Virginia''-class cruiser

Submarine reactors

* NR-1 reactor ** one-of-a-kind reactor built for the U.S. Navy research submarine ''NR-1'' * S1C reactor ** land-based prototype for USS ''Tullibee'' (SSN-597); located at

Windsor, Connecticut Windsor is a town in Hartford County, Connecticut, United States, and was the first English settlement in the state. It lies on the northern border of Connecticut's capital, Hartford. The population of Windsor was 29,492 at the 2020 census. P ...

* S1G reactor ** land-based prototype for USS ''Seawolf'' (SSN-575); located at Kesselring site *

S1W reactor The S1W reactor was the first prototype naval reactor used by the United States Navy to prove that the technology could be used for electricity generation and propulsion on submarines. The designation of "S1W" stands for * S = Submarine platfor ...

** land-based prototype for USS ''Nautilus'' (SSN-571); located at

S2C reactor The S2C reactor is a naval reactor used by the United States Navy to provide electricity generation and propulsion on warships. The S2C designation stands for: * S = Submarine platform * 2 = Second generation core designed by the contractor * C ...

** *

S2G reactor The S2G reactor was a naval reactor used by the United States Navy to provide electricity generation and propulsion on warships, and the only liquid metal cooled reactor yet deployed by the US Navy. The S2G designation stands for: * S = Submarin ...

** *

S2W reactor The S2W reactor was a naval reactor used by the United States Navy to provide electricity generation and propulsion on warships. The S2W designation stands for: * S = Submarine platform * 2 = Second generation core designed by the contractor * ...

** * S2Wa reactor ** replacement reactor for USS ''Seawolf'' (SSN-575) *

S3G reactor The S3G reactor is a naval reactor used by the United States Navy to provide electricity generation and propulsion on warships. The S3G designation stands for: * S = Submarine platform * 3 = Third generation core designed by the contractor * G ...

** land-based prototype for USS ''Triton'' (SSN-586); located at Kesselring site *

S3W reactor The S3W reactor is a United States Naval reactor, naval reactor used by the United States Navy to provide electricity generation and Nuclear marine propulsion, propulsion on warships. The S3W designation stands for: * S = Submarine platform * 3 ...

** ** ** * S4G reactor ** *

S4W reactor The S4W reactor was 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 contrac ...

** ** *

S5G reactor The S5G reactor was a prototype naval reactor designed for the United States Navy to provide electricity generation and propulsion on submarines. The S5G designation stands for: * S = Submarine platform * 5 = Fifth generation core designed by th ...

** A land-based prototype located at

, and ** *

S5W reactor The S5W reactor is a nuclear reactor used by the United States Navy to provide electricity generation and propulsion on warships. The S5W designation stands for: * S = Submarine platform * 5 = Fifth generation core designed by the contractor * ...

** ''Skipjack''-class submarine (SSN-585 class) ** ''George Washington''-class submarine (SSBN-598 class) ** ''Thresher''/''Permit''-class submarine (SSN-593/SSN-594 class) ** ''Ethan Allen''-class submarine (SSBN-608 class) ** ''Lafayette''-class submarine (SSBN-616 class) ** ''James Madison''-class submarine (SSBN-627 class) ** ''Benjamin Franklin''-class submarine (SSBN-640 class) ** ''Sturgeon''-class submarine (SSN-637 class) ** ** *

S6G reactor The S6G reactor is a naval reactor used by the United States Navy to provide electricity generation and propulsion on attack submarines. The S6G designation stands for: * S = Submarine platform * 6 = Sixth generation core designed by the cont ...

** ''Los Angeles''-class submarine (SSN-688 class) * S6W reactor ** ''Seawolf''-class submarine (SSN-21 class) * S7G reactor ** land-based prototype (Modifications and Additions to a Reactor Facility or "MARF") located at the Kesselring site *

S8G reactor The S8G reactor is a naval reactor used by the United States Navy to provide electricity generation and propulsion on warships. The S8G designation stands for: * S = Submarine platform * 8 = Eighth generation core designed by the contractor * G = ...

** {{sclass, Ohio, submarine, 2s (SSBN-726 class) *

S9G reactor The S9G reactor is a naval reactor used by the United States Navy to provide electricity generation and propulsion on ''Virginia'' class submarines. The S9G designation stands for: * S, Submarine platform * 9, Ninth generation core designed ...

** ''Virginia''-class submarine (SSN-774 class) *

S1B reactor The S1B reactor is a naval reactor used by the United States Navy to provide electricity generation and propulsion on ''Columbia''-class submarines. The S1B designation stands for: * S = Submarine platform * 1 = First generation core designed ...

** ''Columbia''-class submarine (SSBN-826 class)

References

US Navy Propulsion Systems
– Federation of American Scientists

– CombatIndex.com * * Reactors

United States Naval reactors United States naval reactors are nuclear reactors used by the United States Navy aboard certain ships to generate the steam used to produce power for propulsion, electric power, catapulting airplanes in aircraft carriers, and a few more minor u ...

Reactor designations

Nuclear reactors of the United States Navy

Aircraft carrier reactors

Cruiser reactors

Destroyer reactors

Submarine reactors

See also

References