US Air Force Transports Nuclear Microreactor, Signaling New Era in Military Power

February 15, 2026, marked a pivotal moment for the U.S. Military and the advancement of nuclear technology. Personnel from the U.S. Air Force, alongside civilian contractors, successfully airlifted a 5-megawatt nuclear reactor aboard a C-17 Globemaster III aircraft. This event represents the first time a nuclear reactor has been transported by a C-17, demonstrating a significant leap in the rapid deployment capabilities of advanced nuclear power systems.

The Ward 250 Microreactor: A New Generation of Power

The transported reactor, a Ward 250 microreactor developed by Valar Atomics, is compact enough to fit within the cargo hold of a C-17 Globemaster III. The flight originated at March Air Reserve Base in California and concluded at Hill Air Force Base in Utah, where the reactor will undergo further testing and evaluation at the Utah San Rafael Energy Lab [1]. The Ward 250 is designed to generate approximately 5 megawatts of power, enough to support roughly 5,000 homes or a substantial military installation [2].

Accelerating Domestic Nuclear Capabilities

This deployment is a direct result of Executive Order 14301, issued in May 2025, which aims to accelerate domestic nuclear capabilities and achieve reactor criticality within the United States by July 4, 2026 [1]. Valar Atomics was selected to participate in the President’s accelerated nuclear program on August 12, 2025 [3]. The company’s WardZero prototype was developed in Los Angeles prior to the issuance of the Executive Order. The Department of Energy subsequently selected the Ward 250 as a project targeted to “achieve criticality on American soil by July 4th, 2026” [3].

Why the C-17 Globemaster III?

The C-17 Globemaster III was chosen for its unique capabilities. Although the C-5 Galaxy offers greater cargo capacity, the C-17 squadron stationed at March Air Reserve Base provided logistical advantages due to its proximity to Valar Atomics and its ability to meet the payload requirements [3]. The USAF describes the C-17 as “the most flexible cargo aircraft to enter the airlift force,” renowned for its ability to deliver cargo and personnel to forward operating bases globally [3]. The aircraft’s specifications include a length of 174 feet, a wingspan of 169.8 feet, and four Pratt & Whitney F117-PW-100 turbofan engines producing 40,400 pounds of thrust each. Its short runway capability and reverse thrust functionality further enhance its operational flexibility.

Implications for Military Operations

The successful airlift of the Ward 250 demonstrates the potential to eliminate reliance on vulnerable fuel supply lines and conventional power grids for military operations. The ability to rapidly deploy compact nuclear power systems to remote or contested environments offers enhanced energy resilience and operational independence. This breakthrough, as described by Energy Secretary Chris Wright and Under Secretary of Defense for Acquisition and Sustainment Michael Duffey, signals the beginning of an American nuclear renaissance [3].