Tech titans back SMRs for AI data centers

Valor Atomics is spearheading a transformative approach to nuclear energy by advancing the first advanced TRISO reactor in the U.S. in over 50 years, specifically engineered to meet the surging power demands of AI data centers. With a recent $130 million Series A funding round, the company is shifting from prototype construction to active energy generation, aiming to manufacture reactors at scale rather than relying on traditional construction methods. Founder Isaiah Taylor emphasizes that this strategy, combined with an open regulatory environment, will enable nuclear energy to become ten times cheaper, unlocking new markets and powering the hyper-technological industrial future driven by AI.

Radiant is pioneering portable nuclear reactors with a novel 1 MW design roughly the size of a shipping container, marking the first new reactor design to go critical at Idaho National Laboratory since 1977. Backed by over $300 million in funding from Boost and Draper Associates, Radiant is accelerating mass production and operator training through a large manufacturing facility on Department of Energy land in Tennessee. Their modular reactors are already attracting diverse customers, including military bases and AI data centers, with Equinix placing an order for 20 units, highlighting the growing demand for flexible, scalable nuclear power solutions.

Small modular reactors (SMRs) like TerraPower’s Natrium plant represent a promising yet economically challenging innovation in nuclear technology, offering scalable, factory-built solutions tailored to rising electricity demands from AI data centers and electrification. While TerraPower’s 345-megawatt sodium-cooled reactor with molten-salt energy storage is poised to operate by 2031 as the first new U.S. commercial reactor in nearly a decade, early cost estimates ranging from $150 to $400 per megawatt-hour underscore the need for mass manufacturing to achieve cost competitiveness with gas plants. Despite these hurdles, SMRs hold potential for niche markets such as remote grids and industrial facilities, contingent on successful replication beyond initial demonstration projects.

The nuclear reactor landscape is diversifying with a spectrum of technologies ranging from microreactors (1–10 MWe) designed for remote and specialized applications to small modular reactors (75–350 MWe) that offer operational advantages like phased capital deployment and staggered refueling, making them ideal for replacing retiring coal plants in smaller increments. Advanced Generation 4 reactors incorporate inherent safety features that eliminate failure modes by design, such as removing pumps to prevent pump failures, enhancing reliability. While large gigawatt-scale reactors remain feasible in countries like Russia and China, the U.S. market favors modular, cost-effective designs amid a renewed focus on recommissioning existing plants and leveraging emerging coolant technologies to improve efficiency and enable new applications like process heat and fuel recycling.

Startups like Radiant and Oklo are pioneering new business models that challenge traditional utility-led nuclear deployment by developing modular, portable reactors and offering service-based ownership and operation directly to customers such as data centers and industrial users. Radiant’s strategy includes building a 1 MW portable reactor with orders from Equinix and contracts with the Air Force, supported by over $300 million in funding to scale production at a DOE site in Tennessee, while Oklo plans to own and operate its Aurora Powerhouse reactors onsite nationwide, reflecting a shift toward decentralized, customer-focused nuclear power solutions.

By early 2026, tech giants and hyperscalers like Amazon, Google, Meta, and Microsoft emerged as transformative players in the nuclear sector, securing multi-year power purchase agreements and investing in advanced reactor projects without necessarily operating the plants themselves. Amazon’s partnership with X-energy to deploy small modular reactors, Google’s off-take deal with Kairos Power, and Microsoft’s agreement to reopen Three Mile Island unit one exemplify how these companies are reshaping nuclear energy procurement into a strategic, long-term component of their clean energy portfolios.

Independent developers such as Fermi America and Valar Atomics are redefining nuclear deployment through gigawatt-scale nuclear energy parks and 'gigasite' strategies that emphasize speed, scale, and control over project timelines. Valar Atomics’ approach to rapidly build gigawatt-scale sites on their own schedule aims to create a 'Ford moment' for nuclear power, banking on the premise that large-scale, affordable power will attract hyperscale data centers and industrial customers organically, thereby reversing the traditional customer-driven demand model.

The rise of hyperscalers as dominant nuclear customers—accounting for 45% of announced or prospective U.S. commercial nuclear capacity—has catalyzed a market formation phase where demand outpaces the maturity of technology, regulation, and supply chains. This surge is driving a 'matrix of orderbooks' approach, with diverse project structures tailored to different use cases and supported by innovative financing models like construction-to-permanent (C2P) adapted from the data center sector. Such frameworks, including PropCo/OpCo bifurcation, are critical to overcoming nuclear’s traditional financing and regulatory challenges, enabling scalable, market-driven deployment aligned with the fast-growing needs of data centers and industrial users.

By mid-2026, the U.S. Department of Energy (DOE) catalyzed a major financing push for nuclear expansion through a multi-billion-dollar loan program aimed at constructing 10 Westinghouse AP1000 reactors by 2030, with each project backed by $500 million in private commitments from Westinghouse and utility partners. This approach leverages standardized, interchangeable long-lead equipment to streamline supply chains and reduce costs, while integrating hyperscale tech companies as key financiers via long-term power purchase agreements and potential equity stakes, thus blending federal support with private capital and market demand to de-risk early-stage nuclear development.

The private sector’s growing enthusiasm for nuclear energy is underscored by Meta’s 20-year power purchase agreements with Vistra’s Midwest nuclear plants and investments in small modular reactors, reflecting a broader corporate pivot toward clean, reliable power sources. Simultaneously, international development banks like the World Bank and Asian Development Bank have reversed longstanding policies to support nuclear investments, particularly in life extension and SMRs, thereby unlocking new capital flows and helping U.S. nuclear technologies compete globally against state-backed rivals from Russia, China, Korea, and France.

Despite a surge in venture capital funding—over $4.5 billion invested globally in 81 nuclear startups in 2024 alone, with U.S. companies like Antares raising $370 million in Series C rounds—nuclear project finance remains challenged by construction risks and regulatory complexity. Adapting the construction-to-permanent (C2P) financing model from the data center sector, paired with PropCo/OpCo structures, offers a promising blueprint to transform nuclear into a scalable, bankable asset class; however, the multi-year build times and historic cost overruns, exemplified by Vogtle Units 3 and 4, continue to deter traditional non-recourse project finance and necessitate innovative risk-sharing mechanisms.

Meeting the ambitious goal of tripling global nuclear capacity by 2050 demands a dramatic scaling of annual investment from roughly $30 billion today—primarily driven by China and Russia—to upwards of $250 billion, totaling $6 trillion across the sector. Achieving this scale hinges not on capital scarcity but on establishing market readiness through institutional support, standardized business models, credible risk pricing, and government-backed mechanisms that mitigate construction, market, and political risks. Tools like the World Nuclear Investment Guide are pivotal in equipping financial institutions with the frameworks needed to confidently assess nuclear projects alongside other major infrastructure investments, while export credit agencies and trade finance are critical to funding supply chain capacity expansion ahead of confirmed orders.

By early 2026, the Trump Administration had set an ambitious regulatory agenda to expand U.S. nuclear capacity to 300 GW by 2050, signaling a robust policy commitment to meet surging AI and data center energy demands. However, despite this push, significant regulatory hurdles and lengthy construction timelines continued to challenge project scalability, prompting research into innovative pathways such as restarting retired reactors and deploying small modular reactors to accelerate deployment.

The Department of Energy’s aggressive loan initiatives, notably the plan to finance 10 Westinghouse AP1000 reactors by 2030, exemplify a strategic shift toward public-private partnerships that share financial risk and standardize supply chains. With Westinghouse and partners each committing $500 million upfront, and hyperscale tech giants like Meta entering long-term power purchase agreements, these efforts aim to lower costs and stabilize project economics without burdening consumers, though federal agreements on cost overrun protections remain essential to secure state regulatory approvals.

Internationally, a notable policy pivot by development banks such as the World Bank and Asian Development Bank toward financing nuclear life extensions and small modular reactors is poised to accelerate nuclear deployment in developing markets while leveling the export playing field for U.S. technologies against state-backed competitors from Russia, China, Korea, and France. Yet, despite strong private sector interest and long-term agreements, the absence of bankable proposals underscores persistent regulatory and financial barriers that must be addressed to translate commitments into concrete projects.

The nuclear sector is witnessing a paradigm shift from bespoke, one-off projects to a matrix of standardized, repeatable reactor designs and financing models, facilitated by DOE’s American Nuclear Supply Chain Loans program and evolving regulatory frameworks. This transition not only accelerates project execution but also fosters increased M&A activity and innovative risk-sharing mechanisms, granting early movers with political connections and substantial funding a strategic advantage in navigating regulatory complexities and securing first-to-market status in advanced nuclear technologies.

By early 2026, the explosive growth in electricity demand from AI and hyperscale data centers has created a strategic imperative for reliable, carbon-free power sources, positioning nuclear energy—particularly advanced reactors and small modular reactors (SMRs)—as a critical solution. Estimates suggest AI infrastructure alone could require roughly 30.5 gigawatts of new power, equivalent to about 90 TerraPower-sized reactors, while SMRs, designed for adaptability and smaller scale, are increasingly seen as tailored to meet these surging needs despite ongoing questions about their economic viability, with costs currently ranging from $150 to $400 per megawatt-hour depending on construction efficiencies and scale.

The traditional nuclear customer base is undergoing a profound transformation as hyperscale data center operators and major tech companies emerge as dominant new buyers, accounting for 45% of announced or prospective U.S. commercial nuclear capacity by mid-2026. Companies like Amazon, Meta, Google, and Microsoft have inked multi-year deals with nuclear firms such as X-energy, TerraPower, Oklo, Kairos, Helion, and Constellation Energy to secure reliable, carbon-free power, signaling a shift from utilities to corporate and private sector buyers driven by the need for 24/7 clean energy and energy security amid global supply disruptions.

This surge in demand from AI and data centers is reshaping market dynamics by accelerating investment in advanced nuclear technologies and fostering unprecedented coordination across financial, regulatory, and industrial sectors to achieve ambitious capacity targets—up to 400 GW by 2050. Hyperscalers are not only driving interest in new builds of small and advanced light-water reactors but are also catalyzing near-term capacity growth through deals to restart, uprate, or extend existing nuclear plants, underscoring the evolving and expanding market opportunities beyond traditional energy sectors.

Despite the promising outlook, integrating nuclear power with data centers faces significant challenges including regulatory hurdles, high upfront costs, and construction timelines, necessitating strategic planning and supportive policies. Research efforts, such as those by Argonne National Laboratory, are focusing on feasibility, siting, and case studies to develop frameworks for this integration, while investor interest in nuclear startups like Helion Energy and Valor Atomic is growing, reflecting a nascent but rapidly evolving market opportunity to power AI's energy-intensive infrastructure with low-pollution, reliable nuclear energy.

By early 2026, nuclear energy, particularly through small modular reactors (SMRs), faces steep cost and scalability hurdles that challenge its mainstream adoption. TerraPower's first SMR unit, with an estimated $4 billion price tag and electricity costs between $150 and $400 per megawatt-hour, starkly contrasts with modern gas plants priced at $55–$85 per megawatt-hour. Despite these economic headwinds, SMRs hold promise as reliable, carbon-free power sources that can complement intermittent renewables and serve niche markets such as remote grids and AI data centers, with JPMorgan highlighting their potential to replace retiring coal plants if sufficient investment and regulatory approvals materialize. Meeting surging electricity demand driven by AI, electric vehicles, and electrified heating will require not only rapid deployment of current technologies but also a tripling of investment and capacity expansion, underscoring the scale of the challenge ahead.

The nuclear sector is witnessing renewed enthusiasm fueled by rising electricity demand and technological innovation, including efforts to recommission previously shut-down plants to quickly boost capacity. Notably, tech giants like Google and Microsoft have secured power from these recommissioned plants, signaling direct corporate support for nuclear energy as a backbone for digital infrastructure. Meanwhile, advanced Generation 4 reactors promise inherent safety improvements by eliminating failure-prone components such as pumps, yet their high costs and unproven large-scale construction feasibility temper near-term prospects, especially in the U.S. This dual approach of revitalizing existing assets while innovating next-generation designs reflects a pragmatic strategy to balance safety, cost, and scalability.

The future cost and deployment landscape of nuclear energy is shaped by a diverse reactor ecosystem ranging from microreactors for remote and military applications to SMRs and large traditional reactors like the AP1000, each optimized for different scales and uses. This diversity reflects a trade-off between economies of scale favoring large reactors and economies of production benefiting smaller modular units, with optimism that a mix of technologies will be necessary to meet the multifaceted energy demands of the digital economy. Innovations in coolant technologies—such as sodium, molten salt, and helium—offer pathways to enhanced operating efficiencies, safety, and new applications including process heat and fuel recycling, further expanding nuclear’s potential role in a clean energy future.

Achieving the ambitious goal of tripling global nuclear capacity by 2050 demands a seismic shift in investment, workforce expansion, supply chain development, and financing mechanisms. The Nuclear Energy Agency (NEA) estimates that annual capital requirements must surge from $12 billion to as much as $200 billion in the 2030s, with total sector investment reaching $6 trillion to cover mining, construction, decommissioning, and storage. Critical to this effort is extending the operational life of existing reactors, many of which lack license renewals beyond 2040, alongside transitioning from fragmented project-by-project approaches to coordinated programmatic deployment supported by international cooperation. Mobilizing private capital hinges on creating bankable projects with clear risk allocation and government-backed risk reduction, as emphasized by NEA Director-General William Magwood and World Nuclear Association’s Sama Bilbao y León, who stress that the challenge lies not in capital scarcity but in building the confidence, capability, and investment architecture necessary for nuclear to become a mainstream clean energy pillar powering the digital economy’s future.