Leveraging more than $140 million in private capital fundraising, over 322,000 square feet of operational manufacturing space, and multifaceted partnerships with the Departments of Energy and Defense, reactor start-up Antares has become the first company involved in the Reactor Pilot Program to achieve zero-power fueled criticality—a full month ahead of the July 4 deadline set by President Trump’s Executive Order 14301.

This milestone, announced yesterday, was achieved with the company’s Mark-0: a sodium heat-pipe-cooled, TRISO-fueled microreactor. The Mark-0 is a forerunner to the company’s flagship design, which it calls the R1. For Antares, this development represents a key validation of its reactor physics, control systems, and supply chain.

This Saturday, May 23, will mark one year since President Trump issued four executive orders (EOs) that sought to implement sweeping changes across the U.S. nuclear industry. From regulatory reform at the Nuclear Regulatory Commission to new authorization projects at the Departments of Energy and Defense, the orders sent ripples throughout the industry.

Malmstrom Air Force Base in Montana. (Photo: Malmstrom AFB)

The Department of the Air Force (DAF) and the Defense Innovation Unit within the Department of Defense have selected Buckley Space Force Base in Colorado and Malmstrom Air Force Base in Montana to potentially site microreactors.

Wednesday’s announcement moves forward the plans of the Advanced Nuclear Power for Installations (ANPI) program, which was launched in 2024 with the objective of deploying “advanced, contractor-owned and operated” microreactors from commercial reactor companies on bases.

Nuclear reactor designs approved by the Department of Energy or Department of Defense could get streamlined pathways through the Nuclear Regulatory Commission’s commercial licensing process should applicants wish to push the technology into the civilian sector.

A proposed rule introduced April 2 by the NRC would “improve NRC licensing review efficiency, where applicable, by explicitly establishing by regulation an additional means for reactor applicants to demonstrate the safety functions of their reactor designs, and thus, would contribute to the safe and secure use and deployment of civilian nuclear energy technologies.”

A new, more complex nuclear age has begun. Echoing the tensions of the Cold War amid rapidly evolving nuclear and radiological threats, preparedness in the modern age is a contest of scientific innovation. The Research and Development Directorate (RD) at the Defense Threat Reduction Agency (DTRA) is charged with winning this contest.

The U.S. Air Force wants to hear from companies that could be interested in deploying small nuclear reactors at its bases.

The request for information posted Wednesday intends to assist the federal government in identifying potential developers and “understanding the company’s capability to design, license, fuel, construct, and deploy Small, Micro, or Modular Reactor (SMR) technologies in compliance with applicable regulatory, safety, environmental, and security requirements.”

Attendees at last week’s 2026 Regulatory Information Conference, hosted by the Nuclear Regulatory Commission, saw extensive discussion of new reactor technologies, uprates, fusion, multiunit deployments, supply chain, and much more.

With the industry in a state of rapid evolution, there was much to discuss. Connected to all these topics was one central theme: the ongoing changes at the NRC. With massively shortened timelines, the ADVANCE Act and Executive Order 14300, and new interagency collaboration and authorization pathways in mind, speakers spent much of the RIC exploring what the road ahead looks like for the NRC.

Valar's Ward250 microreactor being loaded, without fuel, onto a C-17 aircraft. (Photo: Valar Atomics)

A public-private partnership between the Departments of Defense and Energy and Valar Atomics marked a milestone over the weekend when Valar’s Ward250 microreactor was transported (without fuel) from California to Utah using three C-17 aircraft. The reactor will now trek from Hill Air Force Base to the Utah San Rafael Energy Lab (URSEL) for testing and evaluation.

A formal press conference at Hill Air Force Base included Energy Secretary Chris Wright, Undersecretary of Defense Michael Duffey, Utah Gov. Spencer Cox, and Valar Atomics CEO Isaiah Taylor.

During his remarks, Wright discussed the significance of the day, and said “a 5‑megawatt Valar Atomics nuclear reactor was just flown from L.A. to this air force base here in Utah—an incredible 5‑megawatt reactor that powers 5,000 homes, flown in the back of a plane.” The ability to transport microreactors like the Ward250 bolsters claims that the technology could be deployed to remote locations, military installations, or to support natural disaster relief missions.

Nuclear technology start-up Project Omega announced on February 11 that it has emerged from stealth mode with hopes of processing and recycling spent nuclear fuel into “long-duration, high-density power sources and critical materials for the nuclear industry.”

Thursday was a busy news day for the Nuclear Regulatory Commission, with three significant announcements.

In the span of a few hours, the NRC released the news of Ho Nieh’s promotion to chair, the reversal of the plan to sunset its aircraft impact assessment provisions, and new guidance for interagency collaboration.

In April, President Donald Trump signed Executive Order 14270, “Zero-Based Regulatory Budgeting to Unleash American Energy,” which calls for the Nuclear Regulatory Commission (along with the Department of Energy, the Federal Energy Regulatory Commission, and the Environmental Protection Agency) to issue a “sunset rule” to effectively nullify certain regulations in no more than five years.

This week, BWX Technologies, alongside Idaho National Laboratory and the Department of Defense’s Strategic Capabilities Office, announced the arrival of a full core of TRISO fuel at INL’s Transient Reactor Test Facility.

Radiant Industries will build its first portable nuclear reactor at the site of the Manhattan Project in Oak Ridge, Tenn.

The land for Radiant’s new factory includes portions of the K-27 and K-29 Manhattan Project sites. The company plans to test Kaleidos, a 1-MW nuclear microreactor, in 2026, with first deployments expected soon after.

The Nuclear Regulatory Commission recently announced that David Wright, after being nominated by President Trump and confirmed by the Senate, was ceremonially sworn in as NRC chair on September 8.

This swearing in comes more than a month after Wright began his third term on the commission; he began leading as chair July 31. His term will conclude on June 30, 2030.

You could call it a power contest. Teams picked for a new research program from the Defense Advanced Research Projects Agency (DARPA) will compete to design radiovoltaic cells that can outperform others in measured power density and endure high-flux radiation from a U.S. Army Research Lab linear accelerator. The top teams will strive to make it through a second downselect based on the performance of cells sequestered in time capsules and subjected to even more punishing high-flux radiation. Concepts that make it to the bonus period have a chance to be built into radioisotope-fueled power systems uniquely suited to high-radiation regions of space or dark, remote places on Earth.

In the weeks since President Donald Trump issued four nuclear energy–-focused executive orders (EOs), stakeholders across the nuclear industry weighed in on the plans and details. The American Nuclear Society convened an expert advisory group to study the directives and provide constructive input for the pending implementation.

The U.S. Department of Defense has awarded NorthStar Group Services subsidiary NorthStar Maritime Dismantlement Services a firm-fixed-price contract worth $536,749,731 for the dismantling, recycling, and disposal of the historic USS Enterprise (now also known as the ex-Enterprise), the world’s first nuclear-powered aircraft carrier. The work will be performed in Mobile, Ala., and is expected to be completed by November 2029.

Radiant Industries has announced a $100 million Series C funding round to be used primarily to complete its Kaleidos Development Unit (KDU) microreactor for testing in Idaho National Laboratory's Demonstration of Microreactor Experiments (DOME) facility within two years.

The Department of Defense announced September 24 that it has broken ground on the site at Idaho National Laboratory’s Critical Infrastructure Test Range Complex (CITRC) where Project Pele, a transportable 1–5 MWe microreactor, will be tested. The DOD’s Strategic Capabilities Office (SCO) is in charge, on a mission to prove that a mobile microreactor can help meet the DOD’s increasing demand for resilient carbon-free energy for mission-critical operations in remote and austere environments.

Nuclear power already has an energy density advantage over other sources of thermal electricity generation. But what if nuclear generation didn’t require a steam turbine? What if the radiation from a reactor was less a problem to be managed and more a source of energy? And what if an energy conversion technology could scale to fit nuclear power systems ranging from miniature batteries to the grid? The Defense Advanced Research Projects Agency (DARPA) Defense Sciences Office (DSO) is asking these types of questions in a request for information on High Power Direct Energy Conversion from Nuclear Power Systems, released August 1.