IAEA Calls for Concrete Nuclear Power Projects from Over 60 Nations

At a major international conference in late October 2026, the head of the International Atomic Energy Agency (IAEA) urged more than 60 nations to turn their growing support for nuclear power into concrete projects. The call from Director General Rafael Mariano Grossi in Incheon, Republic of Korea, reflects a global shift as countries look to nuclear energy to meet surging electricity demand, increase energy security, and combat climate change.

This renewed interest is largely powered by the promise of new reactor technologies designed to be safer, more flexible, and faster to build than their predecessors. These advancements, combined with pressing geopolitical and environmental concerns, are creating the most significant momentum for nuclear power in decades.

The New Generation of Reactors

The nuclear industry is moving beyond the large, conventional power plants that have defined it for half a century. A new wave of advanced reactors aims to address many of the historical challenges associated with nuclear energy, from cost and construction time to safety and waste.

Small Modular Reactors (SMRs)

Much of the current excitement centers on Small Modular Reactors, or SMRs. These are nuclear reactors that generate up to 300 megawatts of electricity, about a third of a traditional plant's output. Their key innovation is modularity: major components are built in a factory and shipped to a site for assembly. This process aims to shorten on-site construction from over seven years to between three and five years, which could lower upfront capital costs and make financing more accessible.

SMRs are designed with enhanced safety features, often relying on "passive" systems that use natural forces like gravity and convection to cool the reactor in an emergency, reducing the need for external power or human intervention. They are also versatile, capable of providing high-temperature heat for industrial processes like hydrogen production or water desalination. According to IAEA data from October 2025, four SMRs were already operational in Russia, China, and Japan, with several more under construction. Even smaller designs, known as microreactors, are being developed for remote communities, military bases, or data centers that are not connected to a larger electrical grid.

Generation IV Reactors

Another category of advanced designs, known as Generation IV reactors, represents a more fundamental technological leap. First conceptualized in the early 2000s, these six reactor types use innovative coolants like liquid metal, molten salt, or high-temperature gas instead of water. Research on these concepts dates back to the 1950s.

These designs operate at higher temperatures and lower pressures, which can increase efficiency. Proponents claim they have the potential to extract 100 to 300 times more energy from the same amount of fuel and can even "burn" existing nuclear waste, drastically reducing its volume and the time it remains radioactive from millennia to centuries. China connected the world's first demonstration Generation IV reactor to its grid in December 2023, a significant milestone for the technology.

Geopolitical Tailwinds

The push for new nuclear technology is happening alongside powerful global trends that make the stability of nuclear power more attractive. Geopolitical conflicts, particularly the war in Ukraine and instability in the Middle East, have exposed the vulnerability of energy supplies dependent on fossil fuel imports. Nuclear power offers a path to energy independence, providing a reliable, homegrown source of electricity that operates around the clock.

At the same time, the climate crisis is forcing a global reckoning with carbon emissions. At the COP28 climate summit, more than twenty countries pledged to triple their nuclear energy capacity by 2050 as a key tool for decarbonization. This is coupled with a massive projected increase in electricity use. The IAEA expects global electricity consumption to double by 2030, driven by industrial growth and the voracious energy needs of the digital economy, including AI data centers. Nuclear is one of the few carbon-free energy sources capable of providing the large-scale, constant power required to meet this demand.

The Challenges of Scaling Up

Despite the momentum, a widespread nuclear expansion faces formidable obstacles. The industry must overcome issues that have plagued it for decades while also navigating new supply chain and workforce constraints.

High upfront capital costs remain the single biggest barrier. While SMRs are intended to be cheaper per unit through mass production, a 2011 study suggested they could still be more expensive than larger reactors. Their ultimate cost-effectiveness depends on a level of widespread deployment that has not yet materialized. An October 2026 report also concluded that, for now, nuclear power is not cost-competitive with solar and wind in most countries.

Project delivery is another major hurdle. Traditional nuclear projects are infamous for long construction delays and cost overruns, often tied to complex and lengthy regulatory approvals. Harmonizing regulations across countries to certify new designs like SMRs is seen as crucial but will be a slow, difficult process.

Furthermore, the global supply chain is not ready for a rapid build-out. There are critical shortages in the industrial capacity for uranium conversion and enrichment. In 2025, Russia controlled 40% of the world's enrichment capacity, a strategic vulnerability many nations are now trying to address. Manufacturing specialized components like reactor pressure vessels is also concentrated in just a few countries. Experts believe diversifying these supply chains could take a decade or more.

Finally, the industry must contend with a shortage of skilled workers, the persistent political challenge of long-term nuclear waste disposal, and lingering public safety concerns. While advanced reactors offer potential solutions for waste and incorporate enhanced safety, building public and political trust is essential for any project to succeed.

The IAEA's latest projections show global nuclear capacity could grow from 377 gigawatts in 2025 to over 1,000 gigawatts by 2050 in a high-case scenario. To achieve that, the industry and governments will need to translate ambitious goals and technological promise into a workable strategy for financing, building, and regulating a new fleet of nuclear power plants.