Device Assembly Facility

Device Assembly Facility. The Device Assembly Facility is a specialized, high-security complex located within the Nevada National Security Site dedicated to the handling, assembly, and maintenance of the United States nuclear weapons stockpile. Operated by the National Nuclear Security Administration, it serves as a critical hub for ensuring the safety, security, and reliability of the nation's strategic deterrent without conducting full-scale nuclear tests. The facility's operations are central to the Stockpile Stewardship Program, utilizing advanced scientific tools like those at the National Ignition Facility and the Z Pulsed Power Facility to certify weapons.

History

The need for the Device Assembly Facility emerged in the mid-1970s as the United States Department of Energy sought to consolidate and modernize its nuclear explosive handling operations following the closure of older sites. Construction began in 1977 within the secure confines of the Nevada Test Site, now known as the Nevada National Security Site, and was completed the following year. Its establishment coincided with the evolving focus of the American nuclear complex from development and testing towards maintenance and certification under treaties like the Threshold Test Ban Treaty. Following the moratorium on underground nuclear testing announced by President George H. W. Bush in 1992 and made permanent under the Comprehensive Nuclear-Test-Ban Treaty, the facility's role transitioned entirely to stockpile stewardship activities managed by the National Nuclear Security Administration.

Design and construction

The Device Assembly Facility was engineered to the highest safety and security standards for handling special nuclear materials like plutonium and highly enriched uranium. The main structure is a large, windowless concrete building encompassing approximately 60,000 square feet, divided into multiple reinforced bays and vaults. Critical design features include massive blast doors, sophisticated radiation shielding, and extensive containment systems to prevent any release of radioactive material. The complex is situated in the remote Area 6 of the Nevada National Security Site, providing a vast natural security perimeter. Construction utilized specialized materials and techniques to meet stringent Department of Energy security orders, creating one of the most secure facilities within the nation's nuclear security enterprise.

Operations and capabilities

Primary operations at the Device Assembly Facility involve the assembly, disassembly, inspection, modification, and staging of nuclear warheads and their associated non-nuclear components. Technicians and scientists conduct these activities in dedicated high-bay areas and gloveboxes under strict procedural controls. A key capability is the execution of "zero-yield" hydrodynamic tests, such as those conducted for the B61 nuclear bomb and the W88 warhead, which use chemical high explosives and surrogate materials to study weapon behavior without triggering a nuclear chain reaction. The facility works in close coordination with national laboratories including Los Alamos National Laboratory, Lawrence Livermore National Laboratory, and Sandia National Laboratories. All activities support the core missions of the Stockpile Stewardship Program, ensuring the weapons' reliability and supporting life-extension programs like those for the W76.

Notable projects

The Device Assembly Facility has been integral to numerous significant national security projects. It played a central role in the Stockpile Stewardship Program's early hydrodynamic test series, providing crucial data for certifying the W87 warhead. The facility was heavily involved in the life-extension program for the B61 nuclear bomb, overseeing the assembly of test units and modified components. It also supported the dismantlement of legacy systems as part of the Pantex Plant's disassembly mission under agreements like the Strategic Arms Reduction Treaty. Furthermore, the facility has been used to assemble test articles for experiments at major research centers, including the Dual-Axis Radiographic Hydrodynamic Test Facility and the U1a Complex.

Future use and developments

The future mission of the Device Assembly Facility is closely tied to the ongoing modernization of the United States nuclear triad, which includes new systems like the B61-12 gravity bomb, the W87-1 warhead for the LGM-35 Sentinel intercontinental ballistic missile, and the W93 warhead program. The facility is expected to be a primary site for the assembly and testing of prototypes and production units for these new weapons. Ongoing infrastructure investments aim to upgrade its aging systems and enhance its capacity for handling modern materials and components. Its role will remain vital to the National Nuclear Security Administration's long-term strategy, ensuring the nation's deterrent remains safe, secure, and effective without recourse to nuclear testing.

Category:Buildings and structures in Nye County, Nevada Category:United States Department of Energy nuclear facilities Category:Nuclear weapons infrastructure of the United States