The $30 billion nuclear gamble

The U.S. government is betting big on Small Modular Reactors (SMRs), a new class of compact nuclear plants that promise lower costs and faster construction. The Trump administration has earmarked $30 billion to support the development of SMRs, with the goal of tripling U.S. nuclear capacity by 2050.

Central to this ambition are SMRs, a class of compact nuclear plants that promise lower upfront capital, shorter build times and the ability to be factory-produced and shipped to a site.

According to the report, a dedicated $900 million investment fund backs the effort, and proponents contend that SMRs - and an even smaller variant called micro-reactors - could provide a clean, flexible power source for both sprawling urban grids and remote, off-grid locations that struggle with energy shortages intensified by AI-driven data centers and other high-consumption industries.

SMRs: A new class of nuclear reactors

SMR designs differ mainly in the coolant and moderator materials they employ. light-water reactors use ordinary water, making them a natural back-up for existing grids.

High-temperature gas reactors rely on graphite and helium, delivering intense heat suitable for industrial processes such as hydrogen production. Molten-salt reactors circulate liquid salts for both moderation and cooling, a configuration well-suited to manufacturing environments.

Sodium-cooled reactors replace water with liquid metal, offering higher thermal efficiency and reduced fuel consumption.

The risks and challenges

Critics, however, warn that the promised savings are not yet proven in practice.. The loss of economies of scale can raise both capital and operating expenses, and the now-canceled NuScale project in Idaho reportedly cost nearly three times more per megawatt than comparable wind or solar farms.

Some analysts interpret lower cost estimates as a reflection of relaxed safety standards rather than genuine efficiency gains. Passive safety mechanisms, while elegant on paper, may be vulnerable to extreme natural events, and the limited track record of SMRs means real-world performance data are scarce.

Moreover, the smaller reactors could generate more nuclear waste per unit of electricity, creating new challenges for waste handling and disposal.

Global momentum for SMRs

Globally, about $15.4 billion has been poured into SMR research and development, spawning roughly 74 projects under active construction and another 50 in the pre-project phase.

Only two commercial SMRs are currently operating-Russia's KLT-40S and China's HTR-PM-but the United States has earmarked nearly $894 million for pilot plants in Tennessee, Michigan, Indiana, New York and Nebraska .

In May 2026 the Department of Transportation and the Maritime Administration announced a joint venture to test SMRs on commercial vessels, while the U.S. Air Force and Army have set tentative deployment dates for 2027 and 2030 respectively.

The future of nuclear power

The U.S. government's bet on SMRs is a high-stakes gamble that could pay off big time, but also carries significant risks and challenges. As the world continues to grapple with the transition to clean energy, the future of nuclear power remains uncertain.