The U.S. Navy has awarded Amentum a potential three-year, $85 million contract to design and modernize the infrastructure behind its spent-fuel examination capabilities at the Naval Reactors Facility in Idaho, according to a Department of Defense contract announcement released July 24, 2026. The work falls under the Naval Nuclear Propulsion Program and centers on recapitalizing the aging facilities that let engineers dissect and analyze fuel pulled from the reactors powering the fleet's submarines and aircraft carriers.
Background
The Naval Nuclear Propulsion Program, administered through Naval Reactors, is a joint Navy and Department of Energy organization responsible for every reactor that drives a U.S. warship. It is one of the most tightly controlled engineering enterprises in the federal government, with a safety record and a design discipline built up over seven decades of continuous operation at sea. That discipline rests on a simple principle: nothing about a reactor core is assumed, and everything is measured.
Central to that discipline is the Naval Reactors Facility, which sits on the Idaho National Laboratory site in the high desert west of Idaho Falls. Since the 1950s, the facility has received, examined and stored the spent nuclear fuel removed from naval reactors when cores reach the end of their service life. Engineers there take apart and measure that fuel to determine exactly how each core performed across years of operation, then compare the findings against the predictions that guided the core's original design.
Those examinations are not academic. They close the loop between what designers expected a reactor core to do and what it actually did, and the results feed directly into the next generation of naval reactor cores. By measuring how fuel behaved over years of service, engineers can validate the physics models and safety margins that determine how long a core can run before it must be replaced. That feedback is what lets the program extend core lifetimes with confidence, sparing the fleet the cost and downtime of more frequent refuelings. Much of the physical infrastructure that supports this examination work dates to an earlier era, and the Navy has been steadily moving to recapitalize it so the capability remains available for decades to come.
Key Details
Under the potential three-year, $85 million award, Amentum will design and modernize the program's infrastructure to recapitalize its spent-fuel examination capabilities at the Naval Reactors Facility. The stated purpose is to sustain the Navy's ability to evaluate fuel-core performance against design predictions, the analytical function that supports both current fleet operations and the design of future propulsion plants.
The contract covers design and modernization work rather than the day-to-day handling of nuclear material itself, positioning Amentum as the engineering partner responsible for bringing the examination infrastructure up to a modern standard. The three-year period of performance suggests a defined design-and-build effort tied to specific facility upgrades rather than an open-ended operations role. Modernizing a facility of this kind typically spans the shielded cells, remote-handling systems, ventilation and radiological controls that allow technicians to work with intensely radioactive material at a safe distance, along with the metrology and inspection tooling that turns a disassembled core into usable engineering data.
Mark Whitney, president of Amentum's energy and environment business, tied the award to the company's role in sustaining the nuclear-powered fleet. “This new project underscores Amentum's commitment to supporting the design, engineering, and operational excellence required to sustain the U.S. Navy's nuclear-powered fleet,” he said, framing the examination capability as part of the broader mission of keeping naval reactors safe and reliable over their operational lives. Amentum has deep roots in Department of Energy nuclear and environmental work, and the naval spent-fuel mission sits squarely within that portfolio.
What It Means for Contractors
The naval nuclear market is one of the highest barriers-to-entry corners of the federal contracting landscape. Work tied to reactor cores, spent fuel and the Naval Reactors enterprise demands a nuclear pedigree, cleared personnel and a demonstrated safety culture that few firms can offer. Companies without an established DOE nuclear footprint rarely break into it, which is precisely why an incumbent with Amentum's environmental and nuclear operations history is a natural fit for a design-and-modernization role of this kind. The relationships, clearances and quality systems that qualify a firm for this work take years to build, and they tend to concentrate awards among a small set of established players rather than opening the field to new entrants.
For the broader contractor base, the award is a signal that the recapitalization of Cold War-era nuclear infrastructure is an active and funded line of business. The Naval Reactors Facility, like much of the DOE and Navy nuclear complex, was built generations ago, and the government is now investing to modernize the buildings, systems and specialized equipment that keep these missions running. Design, engineering, construction management and specialized nuclear-services firms should expect a steady flow of similar recapitalization requirements across the DOE and Naval Reactors sites in Idaho, and at comparable facilities elsewhere in the complex.
The contract structure also matters. An $85 million ceiling over three years is a mid-size award by defense standards, large enough to anchor a program team but small enough to leave room for subcontracting to firms with niche capabilities in shielding, remote handling, radiological controls and facility design. Companies that can credibly support a prime on cleared nuclear infrastructure work have an opening to build past performance in a market where past performance is the currency that opens doors. Because the award is structured around design and modernization, it also rewards firms fluent in the documentation, quality assurance and configuration control that govern nuclear facility work as much as the engineering itself.
Finally, the award underscores where the Navy is placing long-term bets. Recapitalizing the ability to examine spent fuel is an investment in the analytical backbone of the propulsion program rather than in a visible platform, and it reflects a recognition that the data pulled from expended cores is what allows the Navy to design the reactors that will carry the fleet through the second half of the century. Contractors tracking the submarine and carrier build-up should treat the supporting nuclear infrastructure as an adjacent and durable demand signal, not a one-off requirement.
