Naval Reactors

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Naval Reactors (NR), which administers the Naval Nuclear Propulsion Program,[1] 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 reactors "from womb to tomb."[2][3] A single entity, it has authority and reporting responsibilities within both the Naval Sea Systems Command (SEA 08)[4] and the National Nuclear Security Administration (NA-30).[5][6] Moreover, the Director of Naval Reactors also serves as a special assistant to the Chief of Naval Operations for Naval Nuclear Propulsion (Code N00N).[7]

Naval Reactors is headed by a Navy four-star admiral. The director serves for a nominal eight-year term of office, the longest standard assignment in the U.S. military.[8][9] The program was originally created under Executive Order 12344[10] by the President Ronald Reagan, on February 1, 1982. The director was concurrently assigned as the deputy administrator for Naval Reactors for the National Nuclear Security Administration via Pub. L.Tooltip Public Law (United States) 98–525 (50 U.S.C. § 2406) on October 19, 1984 in order to assist them in the research, design, development, health, and safety matters pertaining to naval nuclear propulsion plants via 42 U.S.C. § 7158. Executive Order 12344 was made a permanent federal program via Pub. L.Tooltip Public Law (United States) 106–65 (text) (PDF) of October 5, 1999 (50 U.S.C. § 2511).[11]


Soon after his U.S. Navy service during World War II, Captain (later Admiral) Hyman G. Rickover became an early advocate of nuclear marine propulsion. Assigned to the Bureau of Ships in September 1947, Rickover received training in nuclear power at Oak Ridge, Tennessee, and worked with the Bureau to explore the possibility of nuclear ship propulsion. In February 1949 he received an assignment to the Division of Reactor Development, United States Atomic Energy Commission and then assumed control of the Navy's effort as Director of the Naval Reactors Branch in the Bureau of Ships.

The office was originally a joint activity of the U.S. Atomic Energy Commission (AEC) and the U.S. Navy's Bureau of Ships. When the AEC was abolished, Naval Reactors became a joint effort of the Navy and the Energy Research and Development Administration, which partly replaced the AEC. In 1977, ERDA was combined with the Federal Energy Administration to form the U.S. Department of Energy. On the Navy side of the organization, the Bureau of Ships has transitioned since the 1950s to become the Naval Sea Systems Command (NAVSEA), within which NR is Code 08, usually abbreviated NAVSEA 08 or SEA 08.

Within seven years of its inception, the organization that developed from this concept would put into operation the nation's first power reactor (the S1W reactor). The following four years would see three more nuclear submarines and two reactor plant prototypes operating and another seven ships and two prototypes being built. To date, more reactors have been built and safely operated by the NR program than any other US program.

Admiral Rickover parlayed an impressive personal publicity effort and intensive links with the United States Congress into an unprecedented tenure as head of Naval Reactors whereby he could not be relieved by conventional military procedures.[12] He was promoted, partially as a result of Congressional involvement, until he reached the rank of full Admiral and held the position for over 30 years from 1949 to February 1, 1982 (when he was retired).

The history of nuclear propulsion and Rickover's influence and involvement is substantial. Due to the importance and impact of nuclear power, the AEC commissioned the creation of two related historical records to capture important facts of both naval nuclear propulsion and the Shippingport commercial reactor. Both of these official documents necessarily contain a good deal of information on Rickover's choices, methods and technical philosophy in the development of practical nuclear power, but are not biographies. While Rickover cooperated to provide real-time access to facilities, people and records, according to the authors he did not edit; Rickover was in-fact deceased before the second document was completed. These are: (1) Nuclear Navy, 1946-1962 by AEC staff historians Richard G. Hewlett and Francis Duncan, and (2) Rickover and the Nuclear Navy: The Discipline of Technology by Francis Duncan.[13] The AEC makes both of these documents directly available to the public in digital form.

Management and personnel principles[edit]

Many books (including those referenced below) and articles have been written about core NR management principles such as attention to detail and adherence to rigidly-defined standards and specifications, as well as the organization's unique (for government) personnel practices. NR staff and alumni (including Admiral Rickover himself) have often been called by Congress, the President and other government agencies to provide expert opinion and management support to other important government programs, most notably the large scale reviews following the destruction of the Space Shuttles Columbia and Challenger. NR alumni have also founded or led numerous corporate and industrial organizations, for example MPR Associates, Inc. [1], founded by three of Admiral Rickover's leading technical managers in NR's early days.

Program elements[edit]

  • Research, development, and support laboratories
  • Nuclear Component Procurement Organization
  • Nuclear power schools and Naval Reactors training facilities.
  • Naval Nuclear Propulsion Program Headquarters and field offices
  • Naval support facilities and tenders
  • Shipyards that build, overhaul and service the propulsion plants of naval nuclear-powered vessels[1]

List of directors[edit]

The Director of Naval Reactors also concurrently serves as a Deputy Administrator of the National Nuclear Security Administration.[11]

No. Director Term Commission
Portrait Name Took office Left office Term length
Hyman G. Rickover
Rickover, Hyman G.Admiral
Hyman G. Rickover
February 19491 February 1982~ 33 years, 0 days1922 (USNA)
Kinnaird R. McKee
McKee, Kinnaird RoweAdmiral
Kinnaird R. McKee
1 February 198222 October 19886 years, 264 days1951 (USNA)
Bruce DeMars
DeMars, BruceAdmiral
Bruce DeMars
(born 1935)
22 October 198827 September 19967 years, 341 days1957 (USNA)
Frank L. Bowman
Bowman, Frank LeeAdmiral
Frank L. Bowman
(born 1944)
27 September 19965 November 20048 years, 39 days1966 (NROTC)
Kirkland H. Donald
Donald, Kirkland HogueAdmiral
Kirkland H. Donald
(born 1953)
5 November 20042 November 20127 years, 363 days1975 (USNA)
John M. Richardson
Richardson, John MichaelAdmiral
John M. Richardson
(born 1960)
2 November 201214 August 20152 years, 285 days1982 (USNA)
James F. Caldwell Jr.
Caldwell, James Franklin Jr.Admiral
James F. Caldwell Jr.
(born 1959)
14 August 201510 January 20248 years, 149 days1981 (USNA)
William J. Houston
Houston, William J.Admiral
William J. Houston
(born 1968)
10 January 2024Incumbent125 days1990 (NROTC)


  1. ^ a b "Naval Nuclear Propulsion Program". Naval Nuclear Laboratory. 2020. Retrieved 25 October 2020.
  2. ^ "Economics of Defense Policy: Adm. H.G. Rickover : Hearing Before the Joint Economic Committee, Congress of the United States, Ninety-seventh Congress, Second Session". 1982.
  3. ^ "ADM Hyman George Rickover".
  4. ^ "Naval Sea Systems Command > Who We Are > Headquarters".
  5. ^ "Powering the Navy".
  6. ^ "NNSA Organization Chart". Retrieved 18 June 2023.
  7. ^ "General Management" (PDF).
  8. ^ "NNBE Progress Report" (PDF). Retrieved 18 June 2023.
  9. ^ "Executive Orders | National Archives". 15 August 2016.
  10. ^ Executive Order 12344
  11. ^ a b National Nuclear Security Administration, Powering the Navy - NNSP official website
  12. ^ Rockwell, Theodore (2002). The Rickover Effect. IUniverse, Lincoln, NE. p. 155. ISBN 0-595-25270-2.
  13. ^ Nuclear Navy


  • The Rickover Effect: How One Man Made a Difference, Theodore Rockwell, Naval Institute Press (Annapolis, MD), 1992
  • Nuclear Navy: 1946-1962, Francis Duncan and Richard G. Hewlett, Naval Institute Press (Annapolis, MD), 1974
  • Rickover and the Nuclear Navy: The Discipline of Technology, Francis Duncan, Naval Institute Press (Annapolis, MD), 1990
  • Against the Tide: Rickover's Leadership Principles and the Rise of the Nuclear Navy, Dave Oliver, Naval Institute Press (Annapolis, MD), 2014
  • Naval Reactors History Database (archived 2016)