Manufacturer catalog

National Nuclear Security Administration

The National Nuclear Security Administration is the semi-autonomous U.S. Department of Energy agency responsible for the military application of nuclear science, including stewardship, modernization, and production work for the U.S. nuclear weapons stockpile. Its role is not a single factory: NNSA directs a national nuclear security enterprise of laboratories, plants, and sites that design, qualify, manufacture, assemble, surveil, and sustain nuclear weapon systems and components.

2 weapons

Established by Congress in 2000, NNSA maintains and enhances the safety, security, reliability, and effectiveness of the U.S. nuclear weapons stockpile while also carrying out nuclear nonproliferation, emergency response, and naval nuclear propulsion missions. For weapon-system context, its Office of Defense Programs manages stockpile stewardship and modernization through the Stockpile Stewardship and Management Program.

Public NNSA modernization material ties the agency to life-extension and modification programs such as the B61-12 Life Extension Program, W80-4 Life Extension Program, W87-1 Modification Program, W88 Alteration 370, W93/Mk7 acquisition, and B61-13. Those programs depend on coordinated work across sites including Los Alamos, Sandia, Lawrence Livermore, Pantex, Y-12, Savannah River, Kansas City, and the Nevada National Security Site.

nuclear weapon stockpile stewardshipnuclear weapon modernizationlife-extension programswarhead component productionnuclear security enterprise coordination

Notable Systems

B61-12 Life Extension Program, Nuclear gravity bomb, Munitions

B61-12 Life Extension Program

Nuclear gravity bomb

NNSA completed the B61-12 last production unit on December 18, 2024, after a life-extension program that refurbished, reused, or replaced nuclear and non-nuclear components and consolidated earlier B61 variants.

Sources: NNSA completes B61-12 Life Extension Program
W80-4 Life Extension Program, Nuclear warhead life-extension program, Munitions

W80-4 Life Extension Program

Nuclear warhead life-extension program

The W80-4 LEP is NNSA's warhead modernization program for the Air Force Long Range Standoff cruise missile, with official sources describing Phase 6.4 production engineering and first canned-subassembly certification milestones.

Sources: W80-4 Life Extension Program Enters Phase 6.4, NNSA certifies first W80-4 warhead canned subassembly

Manufacturer History

  1. NNSA established

    Congress established NNSA as a semi-autonomous agency within DOE for the military application of nuclear science and related national-security missions.

    Sources: About NNSA

  2. W80-4 enters production engineering

    NNSA approved the W80-4 Life Extension Program to enter Phase 6.4 production engineering, aligning the warhead program with the Air Force Long Range Standoff missile schedule.

    Sources: W80-4 Life Extension Program Enters Phase 6.4

  3. B61-12 last production unit completed

    NNSA completed the B61-12 Life Extension Program last production unit, closing production on a program that began design and development activities in 2008.

    Sources: NNSA completes B61-12 Life Extension Program

  4. First W80-4 canned subassembly certified

    NNSA certified the first W80-4 canned subassembly at Y-12, a production milestone for the warhead's nuclear explosive package.

    Sources: NNSA certifies first W80-4 warhead canned subassembly

Website links
Official NNSA pageAbout NNSAWeapons modernization fact sheetsStockpile Stewardship and Management Plan

NNSA is an agency-level nuclear security enterprise authority. Individual laboratories, plants, sites, and contractors often have more specific design, assembly, component-production, or integration roles on the same weapon program.

Manufacturer Sources

  • About NNSAPublisher: National Nuclear Security Administration | Note: Supports NNSA establishment, DOE agency status, and broad mission responsibilities. | Accessed: 2026-07-11
  • National Nuclear Security AdministrationPublisher: National Nuclear Security Administration | Note: Supports NNSA stockpile stewardship, modernization, and nuclear security enterprise context. | Accessed: 2026-07-11
  • Stockpile Stewardship and Management PlanPublisher: National Nuclear Security Administration | Note: Supports current modernization-program context including W80-4, W87-1, W93, B61-12, W88 Alteration 370, SLCM-N, and B61-13. | Accessed: 2026-07-11
  • NNSA completes B61-12 Life Extension ProgramPublisher: National Nuclear Security Administration | Note: Supports B61-12 program scope, production-completion date, NNSA and nuclear security enterprise roles, and catalog notable-system context. | Accessed: 2026-07-11
  • W80-4 Life Extension Program Enters Phase 6.4Publisher: National Nuclear Security Administration | Note: Supports W80-4 LEP production-engineering status, LRSO connection, and first-production-unit schedule. | Accessed: 2026-07-11
  • NNSA certifies first W80-4 warhead canned subassemblyPublisher: National Nuclear Security Administration | Note: Supports the W80-4 canned-subassembly milestone at Y-12 and official imagery for W80-4 component production. | Accessed: 2026-07-11
  • B61-12 system production ends, sustainment beginsPublisher: Sandia National Laboratories | Note: Supports Sandia's NNSA-laboratory role in B61-12 production closeout and image provenance for the profile. | Accessed: 2026-07-11

Produced weapons

Category

Munitions

Standalone missiles, bombs, rockets, torpedoes, and guided or unguided explosive payloads.

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W80-4 Life Extension Program, Nuclear warhead life-extension program, MunitionsW80-4 Life Extension ProgramNuclear warhead life-extension programBuilt in: United StatesThe W80-4 Life Extension Program is the National Nuclear Security Administration modernization path for extending the W80-1 cruise-missile warhead into the U.S. Air Force Long Range Standoff Weapon. Official NNSA, Sandia, LLNL, GAO, and congressional-budget sources frame it as a stockpile life-extension program rather than a conflict-use weapon: the design moved into Phase 6.4 production engineering in March 2023, a first canned subassembly was certified at Y-12 in September 2025, and full-warhead first production remains scheduled for 2027.