Idaho National Laboratory

Idaho National Laboratory
Name	Idaho National Laboratory
Established	1949
Research type	Nuclear energy, national security, clean energy
Director	John Wagner
City	Idaho Falls
State	Idaho
Country	United States
Operating agency	Battelle Energy Alliance
Website	inl.gov

Contents

History
Mission and research
Facilities and infrastructure
Major projects and achievements
Environmental and safety record
See also

Idaho National Laboratory is a premier scientific research facility operated for the United States Department of Energy. It is the nation's leading center for nuclear energy research and development, playing a critical role in national security and clean energy innovation. The laboratory's expansive desert site has been the proving ground for more nuclear reactors than any other location in the world. Its work supports a broad mission encompassing advanced energy systems, critical infrastructure protection, and environmental stewardship.

History

The laboratory's origins trace back to the Manhattan Project and the establishment of the National Reactor Testing Station in 1949. This remote site in the Idaho desert was selected for its isolation to safely conduct pioneering atomic research. In 1951, Experimental Breeder Reactor I (EBR-I) located here became the first reactor to generate usable electricity from nuclear fission, lighting four bulbs. Throughout the Cold War, the site, later named the Idaho National Engineering Laboratory, was instrumental in developing naval propulsion reactors for the United States Navy and testing numerous reactor designs. Major incidents, including the partial core meltdown at the SL-1 reactor in 1961, provided crucial lessons in reactor safety. The modern laboratory was formed in 2005 through the consolidation of earlier site operations under the management of Battelle Energy Alliance.

Mission and research

The primary mission is to ensure the nation's energy security through innovative science and technology. Core research areas include advancing next-generation nuclear power plants, such as small modular reactors and microreactors, and developing robust nuclear fuel cycle technologies. The laboratory leads major initiatives for the Office of Nuclear Energy, including the Versatile Test Reactor project. Beyond nuclear, its portfolio includes renewable energy integration, grid modernization, and cybersecurity for industrial control systems. Significant work is also dedicated to nonproliferation and nuclear forensics, supporting the missions of the National Nuclear Security Administration and the Department of Homeland Security.

Facilities and infrastructure

The laboratory occupies a vast 890-square-mile site west of Idaho Falls, featuring a unique collection of specialized facilities. Its nuclear infrastructure includes the Advanced Test Reactor, a one-of-a-kind research reactor capable of intense neutron irradiation, and the Transient Reactor Test Facility (TREAT) for studying fuel behavior under accident conditions. The Materials and Fuels Complex houses hot cell facilities for post-irradiation examination of nuclear materials. Other key assets include the Critical Infrastructure Test Range for large-scale cyber-physical systems testing, the Energy Systems Laboratory, and the Center for Advanced Energy Studies, a collaboration with Idaho's public universities.

Major projects and achievements

Landmark achievements began with EBR-I, which also demonstrated the breeder reactor principle. The laboratory developed the first power reactor for the USS Nautilus (SSN-571), enabling the nuclear navy. It created the Loss-of-Fluid Test facility, which provided essential data for commercial light water reactor safety. More recently, it achieved the first separation of americium from used nuclear fuel, a key step for advanced fuel cycles. The lab leads the Nuclear Science User Facilities program, providing researchers nationwide access to its unique capabilities. It is also the designated lead for the DOE's Microreactor Applications Research Validation and Evaluation project.

Environmental and safety record

The laboratory operates under stringent regulations enforced by the Department of Energy, the Environmental Protection Agency, and the Nuclear Regulatory Commission. Its history includes significant environmental remediation efforts, particularly for legacy waste from early nuclear operations, managed under a landmark 1995 agreement with the State of Idaho. Major cleanup milestones have been achieved, including the treatment of sodium-bearing waste. The laboratory maintains a strong safety culture, with its protocols informed by past incidents like the SL-1 accident. Ongoing monitoring and research focus on the long-term stewardship of the site and the safe management of spent nuclear fuel and other materials.