Nuclear Microreactors Could Bring Energy Resilience to the Defense Industrial Base

The Army’s Janus Program could strengthen military energy security while creating the demand needed to expand America’s advanced nuclear manufacturing base.

U.S. Army photo by Capt. Frank Spatt

Reliable energy is a requirement for military readiness. Installations depend on electricity to operate command centers, communications systems, maintenance facilities, data centers, training ranges, and other mission-critical infrastructure. Yet most installations remain connected to the same commercial power grids serving surrounding communities and industries. When those grids are disrupted, the consequences extend beyond temporary inconvenience. Training, maintenance, logistics, and the ability to deploy forces can all be affected.

The U.S. Army is moving to reduce that vulnerability. On August 26, it announced that the Janus Program had selected five nuclear energy companies and five initial military installations for microreactor projects. The Army, working with the Department of War Innovation Unit, plans to award up to a combined $2.2 billion for the companies to own, construct, and operate the reactors. With private investment included, the Army expects the effort could eventually support more than 20 microreactors across Department of War installations.

This is an energy-security initiative, but its importance reaches further. Although the first reactors will serve military installations rather than private defense factories, successful deployment could strengthen the broader defense industrial base by creating demand for domestic nuclear fuel, specialized components, factory fabrication, construction, maintenance, engineering, and a new generation of skilled workers. The program could establish military installations as anchor customers for an emerging American microreactor industry.

Microreactors will not solve every military energy challenge, and the technology still faces significant execution risks. However, the Janus Program provides an opportunity to connect installation resilience with a larger national objective: rebuilding the industrial capacity required to manufacture and deploy advanced energy systems in the United States.

Military Readiness Requires Reliable Power

The commercial grid remains highly reliable under normal conditions, but defense planning cannot be based only on normal conditions. Military installations must prepare for severe weather, equipment failures, physical attacks, cyber incidents, fuel disruptions, and other events that could interrupt power for extended periods.

Backup diesel generators provide an important layer of protection, but they have limitations. They require stored fuel and a dependable resupply system, need regular maintenance and testing, and are generally intended to support selected loads for limited periods. As installations add data-intensive systems, electric infrastructure, advanced manufacturing equipment, and other high-demand capabilities, the gap between short-duration backup power and long-term energy resilience becomes more important.

Microreactors could help fill that gap. These compact nuclear systems are intended to provide steady, round-the-clock power from a relatively small physical footprint. Many advanced designs incorporate passive safety features and are being developed around factory fabrication and modular deployment. Depending on the design, microreactors could operate for several years, and potentially as long as a decade, before refueling, reducing their dependence on frequent fuel deliveries.

That does not mean installations should separate themselves entirely from the grid. A more practical approach is to build layered energy systems combining commercial electricity, onsite generation, storage, microgrids, and backup assets. Within that system, a microreactor could provide dependable baseload power for the most critical operations while other sources respond to changing demand.

The Army’s five initial pairings reflect this move from concept to implementation. Antares Nuclear was matched with Fort Bragg, North Carolina; BWXT Advanced Technologies with Fort Campbell, Kentucky; General Atomics Electromagnetic Systems with Fort Hood, Texas; Radiant Industries with Fort Benning, Georgia; and Westinghouse Government Services with Fort Drum, New York. The Army is targeting September 2028 for operation of the first reactor on a military installation.

The Military Can Become an Anchor Customer

Advanced nuclear developers face a familiar industrial challenge. Companies need orders to justify investments in factories, tooling, suppliers, licensing, and workers, but customers often want to see proven operating systems before committing to orders. Without an initial market, promising technology can remain trapped between demonstration and commercial production.

The Department of War can help break that cycle. Military installations represent a group of customers with a clear requirement for secure and reliable power. The government can accept some of the first-of-a-kind risk, establish performance requirements, and create a pathway from prototypes to repeatable deployments.

The structure of Janus is important. According to the Army, the prototype reactors will be contractor-owned and operated, and government payments will be tied to the achievement of specific technical milestones. That model can help maintain accountability while giving several companies an opportunity to demonstrate different technologies under real operating conditions.

The objective should extend beyond five successful projects. The greater value will come from turning those projects into repeatable products that can be manufactured for other military sites, data centers, remote industrial operations, utilities, and critical infrastructure. Army officials have explicitly said the program will be fully successful only if it helps multiple companies develop reliable and affordable reactors that can be sold beyond the military.

That approach could give the government more than resilient installations. It could help establish an American industry capable of competing in a growing global advanced-energy market.

Building the Manufacturing and Fuel Supply Chain

Traditional nuclear projects are often associated with large, site-specific construction programs, long schedules, complex supply chains, and significant cost risk. Microreactors are intended to follow a different model. They are being designed so that many components can be produced in controlled factory environments, assembled into standardized modules, transported to the customer, and installed with less onsite construction than traditional nuclear projects. However, microreactors are not yet commercially available in the United States, and these advantages still must be demonstrated through repeatable deployment.

The potential advantages are significant. Factory production can improve quality control, allow lessons to be carried from one unit to the next, reduce onsite labor, and make schedules more predictable. Standardization can also support common training, maintenance, spare parts, and operating procedures across multiple installations.

However, modularity alone does not guarantee affordable or repeatable production. The industry must build a qualified domestic supply chain for reactor vessels, heat exchangers, pumps, control systems, shielding, specialty materials, sensors, fuel, transportation packages, and other safety-critical components. Manufacturers will need rigorous quality systems, nuclear-grade documentation, configuration control, cybersecurity, and traceability.

The first units will also need to be designed with production in mind. If every installation receives a substantially different design, the industry will recreate many of the cost and schedule problems that modular manufacturing is supposed to avoid. Site conditions will always require some adaptation, but reactor modules, interfaces, components, and processes should be standardized wherever possible.

This is where industrial planning must accompany technical development. The government and selected companies should assess production capacity early, identify long-lead equipment, qualify alternate suppliers, and develop workforce plans before demand accelerates. A successful demonstration followed by a multiyear production gap would allow critical teams and suppliers to disperse. The transition from prototype to production must be planned from the beginning.

Many advanced reactor designs require high-assay low-enriched uranium, commonly known as HALEU. It is enriched to a higher concentration than the fuel used in most existing commercial reactors, allowing developers to create smaller systems with longer operating cycles and other performance advantages.

The United States is still developing a domestic commercial-scale HALEU supply chain. The Department of Energy has taken steps to expand enrichment, transportation, fuel fabrication, and near-term allocations. In January 2026, DOE announced $2.7 billion in awards intended to strengthen domestic uranium enrichment, including contracts covering low-enriched uranium and HALEU services over the following decade.

That progress is meaningful, but reactor deployment cannot be planned separately from fuel availability. Developers must have a clear path to the correct fuel form, enrichment, fabrication capability, transportation package, and delivery schedule. A completed reactor without qualified fuel is not an energy asset.

The same principle applies to the rest of the nuclear supply chain. Capacity must be measured at the constraint, not at final assembly. One unavailable material, specialized process, or sole-source component can govern the schedule for an entire deployment program.

Regulation, Safety, and Community Confidence Matter

Speed is important, but nuclear deployment must preserve safety, security, and public confidence. Military ownership or siting does not eliminate the need for disciplined engineering, environmental review, emergency planning, waste management, physical security, and transparent communication with surrounding communities.

The first Janus reactor is expected to be regulated by the Army, but broader commercial deployment will also depend on the civilian regulatory environment. In March 2026, the Nuclear Regulatory Commission issued a new Part 53 licensing framework intended to make advanced-reactor licensing more technology-inclusive. The NRC has also proposed a separate approach intended to support the safe, high-volume deployment of microreactors.

More efficient regulation should not mean reduced rigor. It should mean requirements that reflect the size, design, and risk profile of the system being reviewed. Predictable standards will allow developers to design compliance into their products, reduce avoidable rework, and give suppliers greater confidence to invest.

Community engagement must begin early as well. Installations and developers need to clearly explain how each reactor works, how it will be secured, how fuel and waste will be managed, and what safeguards will protect military personnel and nearby residents. Public acceptance cannot be treated as a communications task that begins after major decisions have already been made.

Execution Will Determine the Program’s Value

The Janus Program represents an important step toward strengthening the energy resilience of U.S. military installations. It also creates an opportunity to use defense demand to accelerate domestic nuclear innovation and manufacturing.

Success should be measured by more than whether the first five reactors generate electricity. The program must demonstrate that microreactors can be licensed, financed, manufactured, fueled, installed, operated, maintained, and eventually replicated at a cost and schedule that customers can support.

That will require coordination across the Army, the Department of Energy, regulators, utilities, reactor developers, fuel companies, manufacturers, investors, installations, and local communities. It will also require stable demand and the discipline to standardize systems after the initial designs prove successful.

Energy resilience is now an industrial-base issue. The factories that build weapons, repair equipment, process data, and support military operations cannot function without dependable power. By becoming an anchor customer for microreactors, the military can protect those missions while helping create a domestic industry with applications far beyond the installation fence line.

The opportunity is significant, but it will be realized the same way every major industrial capability is built: through clear requirements, capable suppliers, repeatable production, skilled workers, and consistent execution.