Our Locations | National Nuclear Security Administration

Site Office: Los Alamos Site Office (LASO) manages the resources of the NNSA Los Alamos National Weapons Design Laboratory. LASO aims to minimize safety risks for federal and contractor employees; fosters quality and continuous improvement in the lab's operations and is located in Los Alamos, New Mexico.

Laboratory: The NNSA Los Alamos National Laboratory (LANL) is a design laboratory responsible for the safety and reliability of the nuclear explosives package in nuclear weapons. This laboratory possesses unique capabilities in neutron scattering, enhanced surveillance, radiography, and plutonium science and engineering. LANL is contractor-run by Los Alamos National Security, LLC and is located in Los Alamos, New Mexico.

Site Office: The Pantex Site Office (PXSO) has oversight responsibility for the NNSA Pantex Plant, which is the nation's only nuclear weapons assembly and disassembly facility. Its mission is to provide on-site management, day-to-day oversight and surveillance for the Pantex Plant. The PXSO works closely with the plant's Management and Operating contractor to ensure safe, secure, and cost-effective performance. The PXSO is located at the Pantex Plant 17 miles northeast of Amarillo, Texas.

Plant: The Pantex Plant, located 17 miles northeast of Amarillo, Texas, in Carson County, is charged with maintaining the safety, security and reliability of the nation’s nuclear weapons stockpile. The facility is managed and operated by B&W Pantex for NNSA. Work performed at Pantex includes support of the nuclear weapons life extension programs; nuclear weapons dismantlement; the development, testing and fabrication of high explosive components; and interim storage and surveillance of plutonium pits.

Site Office: Located south of Aiken, South Carolina, the Savannah River Site Office (SRSO) is responsible for the NNSA Defense Program missions at the Department of Energy's Savannah River Site (SRS). The primary missions are reclamation of previously used tritium reservoirs; receipt, packaging and shipping of reservoirs; recycling, extraction, and enrichment of tritium gas in support of the maintenance of the nuclear weapons stockpile, including the U.S. stockpile of tritium; Limited-Life Component Exchange Reservoir Surveillance and Tritium Extraction in support of the maintenance of the nuclear weapons stockpile. The SRS is also the location where three interrelated facilities will be built and operated to implement the United States' nonproliferation commitment to dispose of its surplus weapon-grade plutonium. These facilities are the Mixed Oxide (MOX) Fuel Fabrication Facility (under construction), the Pit Disassembly and Conversion Facility (PDCF), and the Waste Solidification Building (WSB).

Site: The Savannah River Site (SRS) is owned by the U.S. Department of Energy, but the NNSA operates Tritium facilities on the site to supply and process tritium, a radioactive form of hydrogen gas that is a vital component of nuclear weapons. The NNSA-SRS loads tritium and non-tritium reservoirs; including reclamation of previously used tritium reservoirs, receipt, packing and shipping of reservoirs; recycling, extraction, and enrichment of tritium gas and laboratory operations. Today, the Tritium Extraction Facility (TEF) at SRS is the only source of new tritium for the U.S. nuclear weapons stockpile. TEF safely and efficiently extracts tritium gas from rods irradiated in a commercial reactor. Also at SRS is the NNSA Office of Site Engineering and Construction Management, which manages the activities related to U.S. nonproliferation efforts to dispose of surplus highly enriched uranium under the NNSA Uranium Enrichment project and dispose of surplus weapons-grade plutonium through the Mixed Oxide (MOX) Fuel Fabrication Facility, the Pit Disassembly and Conversion Facility (PDCF), and the Waste Solidification Building in F Area. SRS is currently managed and operated by Savannah River Nuclear Solutions, LLC.