Big Tech companies are making headlines with nuclear power announcements, but the actual money committed represents just a fraction of what would be needed to build even a single reactor. While Google, Amazon, and other tech firms tout partnerships with nuclear developers, their real investments remain tiny compared to their data center spending, raising questions about whether nuclear will truly solve AI's energy crisis.

Why Are Tech Companies Talking About Nuclear If They're Not Investing Heavily?

In October 2024, Kairos Power and Google announced a "Master Plant Development Agreement" to deploy 500 megawatts of advanced nuclear power by 2035. Two days later, Amazon and Energy Northwest announced plans to develop small modular reactor (SMR) technology in Washington state, with expectations that reactors would meet energy needs by the early 2030s. These announcements generated significant media coverage and seemed to signal a nuclear renaissance driven by AI demand.

However, the fine print tells a different story. Amazon's agreement only committed the company to "fund the initial feasibility phase" of an SMR project and secured "the right to purchase electricity" from the first project, which would generate 320 megawatts of capacity. Having the right to purchase doesn't obligate Amazon to actually buy the power, especially if costs prove prohibitive.

The Kairos-Google agreement similarly mentions selling "energy, ancillary services, and environmental attributes" under Power Purchase Agreements but says nothing about pricing or actual commitment levels. These carefully worded announcements allow companies to claim nuclear involvement while maintaining flexibility to walk away if economics don't work out.

What's the Real Cost Difference Between Nuclear and Renewables?

The fundamental problem is economics. In the United States, electricity from a new nuclear reactor costs roughly three times as much per unit as electricity from solar or wind power plants. Small modular reactors are even worse; cost estimates suggest SMR electricity would be far more expensive than solar and wind, even when accounting for storage technologies needed to handle variable renewable output.

Consider the numbers: TerraPower's proposed Natrium nuclear plant carries an estimated cost of $9.4 billion to generate 345 megawatts of power. The NuScale SMR project in Idaho was cancelled in 2023 because its $9.3 billion cost estimate for 462 megawatts was deemed too expensive by potential electricity buyers. These aren't hypothetical figures; they represent real projects that failed to move forward due to cost.

Meanwhile, the largest investment announced so far came in June 2026, when TerraPower raised $650 million from investors including NVIDIA's venture capital arm. While substantial, this amount wouldn't even cover construction of a single Natrium reactor, let alone multiple facilities.

How Do These Investments Compare to Tech Companies' Actual Data Center Spending?

The scale mismatch is striking. During their February 2026 earnings calls, Amazon and Google announced plans to spend up to $200 billion and $185 billion, respectively, on data center construction in the coming year. Their nuclear commitments represent just a fraction of one percent of these annual expenditures. This suggests that nuclear announcements function more as public relations than as serious energy solutions.

The diverging cost trends make the situation worse. While renewable energy costs continue falling year over year, nuclear costs have historically risen. This means the cost gap between nuclear and renewables will likely widen, not narrow, making nuclear an increasingly unattractive option for cost-conscious tech companies.

What's Actually Powering the World's Electricity Grid Right Now?

Global electricity generation data reveals the real energy landscape. In 2025, nuclear power accounted for just 8.8 percent of all electrical energy flowing through the world's grids, roughly half its share from 30 years earlier. In contrast, fast-growing renewables such as solar and wind provided 19.5 percent of global electrical energy, while large hydropower plants contributed an additional 13.9 percent.

This data undercuts the narrative of a nuclear renaissance. Despite decades of announcements about nuclear's bright future, renewables are actually meeting growing energy demand at a faster pace and lower cost. The parade of corporate announcements about nuclear partnerships hasn't translated into meaningful market share gains.

Why Do Nuclear Projects Face Such Long Delays and Cost Overruns?

History provides sobering lessons. A study examining 180 nuclear power projects found that 175 exceeded their initial budgets and timelines. Advanced reactor designs and small modular reactors face even greater uncertainty because there's little real-world experience building them commercially.

The few international examples available aren't encouraging. Russia's KLT-40S small modular reactor design, based on decades of icebreaker reactor experience, took 13 years from construction start to generating electricity, instead of the expected 3 years. In China, the twin High Temperature Gas Cooled Reactor units at Shidao Bay took more than twice the promised 50 months to complete.

In the United States, there are currently no small modular reactor projects under construction. The U.S. Department of Energy set a goal in 2020 for the Natrium and Xe-100 reactors to be operational "within 5-7 years," but in November 2025, a Natrium executive promised "commercial operation delivery" by 2031, a significant delay.

Steps to Understand the Nuclear-AI Energy Story

• Check the Fine Print: When tech companies announce nuclear partnerships, look beyond the headline to the actual commitment. Does the agreement obligate them to purchase power, or just give them the option? What are the pricing terms?
• Compare Investment Levels: Measure announced nuclear investments against companies' total data center spending. If nuclear commitments are less than 1 percent of annual data center budgets, the priority is clear.
• Track Cost Trends: Monitor whether nuclear and renewable electricity costs are converging or diverging. Current data shows renewables getting cheaper while nuclear gets more expensive, favoring renewables long-term.
• Monitor Project Timelines: Watch whether announced reactor projects meet their stated deployment dates. Historical patterns suggest significant delays are likely, pushing commercial operation years into the future.

What About Illinois' Interest in New Nuclear Facilities?

While national trends favor renewables, some regions are pursuing nuclear expansion. Nine Illinois communities recently expressed interest in hosting new nuclear facilities, according to Governor JB Pritzker's initiative to bring at least two gigawatts of additional energy online. This capacity would be enough to power up to 2 million homes or 20 large data centers.

Six of the nine interested communities already host existing nuclear plants, including the cities and counties of Marseilles, DeWitt, Grundy, Ogle, Rock Island, and Will. Two additional communities, Peoria County and Jasper County, previously hosted coal-fired power plants that are being decommissioned and see nuclear as a way to maintain their role in energy production. The University of Illinois Urbana-Champaign also expressed interest in a microreactor for research and workforce training purposes.

Constellation Energy, which operates all six of Illinois' existing nuclear plants, estimated it could add 500 megawatts to the grid through upgrades at current sites alone, representing a quarter of the state's two-gigawatt goal. Communities cited economic benefits including high-paying jobs, long-term tax base stability, and existing utility infrastructure as reasons for their interest.

What Recent Progress Has Been Made in Advanced Nuclear Technology?

Despite broader challenges, some advanced nuclear projects are advancing. Oklo Inc. recently secured startup authorization from the U.S. Department of Energy for its Groves Isotope Test Reactor under the Reactor Pilot Program. The approval permits fuel loading, startup testing, and progress toward first criticality, when a reactor first sustains a controlled nuclear chain reaction.

Oklo moved from groundbreaking to startup authorization in just over 10 months, building the facility, establishing operating procedures, qualifying personnel, and completing the DOE review process. The Groves reactor is a low-power test facility intended to demonstrate construction and operating capabilities while advancing plans for domestic isotope production, which could support cancer care, manufacturing, scientific research, space exploration, and national security applications.

The project also creates a potential template for future commercial isotope facilities. Groves was privately financed, built on private land, and assembled using commercially sourced systems alongside OKLO-manufactured components. This approach gives the company practical experience that could lower execution risk and improve deployment timelines for future projects.

Other advanced reactor developers are also progressing. NuScale Power is the first company to receive U.S. Nuclear Regulatory Commission approval for a small modular reactor design and is working on projects in the United States and overseas, including Romania. NANO Nuclear Energy is preparing to begin the NRC licensing process for its first microreactor deployment at the University of Illinois after its construction permit application is formally accepted.

The broader momentum in the advanced nuclear sector reflects a shift from design and testing toward licensing, deployment, and commercial operations. However, this progress in the development pipeline doesn't yet translate to the large-scale, cost-competitive power generation that would be needed to meaningfully address AI data center energy demands at the scale tech companies are suggesting.