# List of United States naval reactors

This list of United States Naval reactors is a comprehensive list of all naval reactors designed, built, or used by the United States Navy.

## Reactor designations

Each nuclear reactor 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
* "G" – General Electric
* "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
** land-based prototype for USS Enterprise (CVN-65); located at Naval Reactors Facility
* A2W reactor
** USS Enterprise (CVN-65)
* A3W reactor
** designed for USS John F. Kennedy (CV-67), but never installed
* A4W reactor
** Nimitz-class aircraft carriers
* A1B reactor
** Gerald R. Ford-class aircraft carriers

### Cruiser reactors

* C1W reactor
** Long Beach-class cruiser

### Destroyer reactors

* D1G reactor
** land-based prototype for Bainbridge-class cruiser; located at the Kesselring site
* D2G reactor
** 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
* S1G reactor
** land-based prototype for USS Seawolf (SSN-575); located at Kesselring site
* S1W reactor
** land-based prototype for USS Nautilus (SSN-571); located at Naval Reactors Facility
* S2C reactor
** USS Tullibee (SSN-597)
* S2G reactor
** USS Seawolf (SSN-575)
* S2W reactor
** USS Nautilus (SSN-571)
* S2Wa reactor
** replacement reactor for USS Seawolf (SSN-575)
* S3G reactor
** land-based prototype for USS Triton (SSN-586); located at Kesselring site
* S3W reactor
** USS Skate (SSN-578)
** USS Sargo (SSN-583)
** USS Halibut (SSGN-587)
* S4G reactor
** USS Triton (SSRN-586)
* S4W reactor
** USS Swordfish (SSN-579)
** USS Seadragon (SSN-584)
* S5G reactor
** A land-based prototype located at Naval Reactors Facility
** USS Narwhal (SSN-671)
* S5W reactor
** 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)
** USS Parche (SSN-683)
** USS Glenard P. Lipscomb (SSN-685)
* S6G reactor
** 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
** Ohio-class submarines (SSBN-726 class)
* S9G reactor
** Virginia-class submarine (SSN-774 class)
* S1B reactor
** Columbia-class submarine (SSBN-826 class)