Nuclear's Unexpected Renaissance: Is This the Missing Piece in the Energy Transition?

After decades in the wilderness of public opinion, nuclear energy is experiencing something remarkable: a genuine comeback. While renewable manufacturers grapple with profitability challenges and the energy transition confronts its complexity, nuclear power is quietly positioning itself as an essential - perhaps indispensable - component of our decarbonized future.

This resurgence isn't driven by nostalgia or ideology. It's propelled by three converging forces: surging electricity demand from data centers and AI, technological innovation in reactor design, and a pragmatic recognition that meeting climate goals while ensuring grid reliability requires every tool in the clean energy arsenal. The question isn't whether nuclear will play a role in the energy transition - it's whether the industry can overcome its historical challenges to play that role effectively and at scale.

The momentum is undeniable

The numbers tell an encouraging story. Global nuclear generation is set to reach an all-time high in 2025, according to the International Energy Agency's recent report "The Path to a New Era for Nuclear Energy". This milestone reflects Japan's reactor restarts, France completing maintenance work, and new facilities coming online in China, India, Korea, and Europe.

Currently, 63 reactors representing over 70 gigawatts of capacity are under construction worldwide - one of the highest levels since 1990. Even more telling, decisions to extend operating lifetimes have been made for over 60 reactors in the past five years, covering nearly 15% of the global installation. Annual investment in nuclear has surged almost 50% since 2020, exceeding $60 billion.

The Nuclear Energy Institute's 2025 Futures Survey provides compelling evidence of this momentum in the United States specifically. Greater than 95% of the 95 units surveyed anticipate receiving approval to operate for at least 80 years - well beyond their original 40-year design lifetimes. More than 73% of sites have some level of interest or planning for power uprates that could collectively provide over 5 gigawatts of additional carbon-free nuclear energy this decade. Plans for new nuclear generation through 2039 show 23.4 gigawatts of capacity, representing a 50% increase over the previous year's survey.

Perhaps most striking: over half the companies surveyed indicated their plans for advanced nuclear had increased over the previous 12 months. Not a single company reported reduced interest.

The data center catalyst

One of the most significant developments driving nuclear's renaissance is the explosive growth of artificial intelligence and the data centers that power it. As MIT Technology Review notes in their recent analysis, "One of the factors driving the rising appetite for nuclear power is the stunning growth of AI, which relies on data centers requiring a huge amount of energy."

The scale of this demand is staggering. Data centers are projected to account for 4.5% of global power demand by 2035 and 8.7% by 2050, according to BloombergNEF's New Energy Outlook 2025. This represents an additional 362 gigawatts of capacity needed by 2035.

Tech giants are responding with unprecedented commitments to nuclear power. Microsoft signed a deal to purchase power from the Three Mile Island reactor if it successfully reopens. Google signed an agreement with Kairos Power to build up to 500 megawatts of small modular reactors by 2035. Amazon went further, investing directly in X-energy to fund development, licensing, and construction of reactor projects.

The NEI survey reflects this trend, with 17 sites expressing interest in behind-the-meter data center applications, with power requirements ranging from 270 to 1,200 megawatts.

What makes nuclear particularly attractive to these technology companies is the combination of zero-carbon generation and 24/7 reliability - precisely what's needed to power AI infrastructure that runs continuously. This represents a fundamentally new market for nuclear power, one with deep-pocketed customers willing to sign long-term contracts and potentially assume project risks.

The small modular reactor promise

Central to nuclear's potential resurgence are small modular reactors, which promise to address many of the challenges that have plagued traditional large-scale nuclear projects. The IEA report makes clear that "cost-competitive SMRs, boosted by government support and new business models, can help clear the path to a new era for nuclear energy."

SMRs offer several theoretical advantages over conventional reactors. Their smaller size - typically 50-400 megawatts compared to over 1,000 megawatts for large reactors - means lower upfront capital requirements and shorter construction timelines. Factory fabrication of standardized modules promises manufacturing efficiencies and quality control improvements. The modular approach allows incremental capacity additions matched to demand growth. And smaller containment structures theoretically reduce construction complexity and site requirements.

Multiple companies are advancing SMR designs toward commercial deployment. Kairos Power received construction permits from the Nuclear Regulatory Commission in 2023 and 2024 for demonstration reactors, with the first planned for completion in 2027. TerraPower is taking a phased approach, breaking ground on non-nuclear portions of its Natrium reactor site in 2024 while awaiting construction approval for the nuclear components, expected by 2026. The US Department of Defense's Project Pele microreactor is set to begin assembly early this year.

The IEA projects that under current policy settings, SMR capacity could reach 40 gigawatts by 2050. However, with tailored policy support and streamlined regulations aligned with robust industry delivery, capacity could reach 120 gigawatts, with over 1,000 SMRs in operation by mid-century. This rapid growth scenario would require cumulative investment of $670 billion through 2050.

If construction costs for SMRs can be brought down to parity with large-scale reactors built on budget over the next 15 years - a challenging but not impossible target - deployment could reach 190 gigawatts by 2050, with cumulative investment totaling $900 billion.

The sobering realities

For all the genuine momentum, nuclear energy faces formidable challenges that warrant clear-eyed assessment. Perhaps most fundamentally, the industry has yet to prove it can consistently build projects on time and on budget in Western markets.

The recent track record is discouraging. The Vogtle plant in Georgia - the first new nuclear construction in the US in over 30 years - came online in 2024 following massive delays and cost overruns that saw total costs balloon to over $30 billion, more than double initial estimates. Similar patterns have plagued projects in France and the United Kingdom. As MIT Technology Review notes, "the nuclear industry in long-time market leaders, such as the United States and France, has struggled in recent years with project delays and cost overruns for all new large-scale reactors."

This execution risk fundamentally undermines the economic case for nuclear. The technology is capital-intensive, with costs heavily front-loaded during the construction phase. Projects that run years behind schedule and billions over budget become economically untenable, scaring away private capital and creating political liabilities.

The geographic distribution of current construction activity reveals this challenge. Of the 52 reactors that have started construction worldwide since 2017, 25 are of Chinese design and 23 of Russian design. China alone accounts for half of current projects under construction and is on course to overtake both the United States and European Union in installed nuclear capacity by 2030. This concentration isn't just a matter of market leadership—it represents significant supply chain risk and geopolitical complexity.

SMRs, while promising, remain largely unproven at commercial scale. The first commercial SMR projects are set to start operation around 2030, meaning we won't have clear evidence of their economics, reliability, or manufacturability for several more years. The oft-cited cost advantages depend on achieving standardization and manufacturing scale - benefits that materialize only after significant deployment. The industry faces a chicken-and-egg challenge: achieving the scale needed for cost reduction requires large orders, but large orders require demonstrated cost-competitiveness.

Financing remains a major barrier. Nuclear projects have traditionally been hard to finance due to their scale, capital intensity, long construction lead times, and technical complexity. This has meant heavy government involvement. But public funding alone will not be sufficient to build a new era for nuclear - private financing will be needed to scale up investments.

The cost of capital is particularly important for nuclear's financial viability. The IEA analysis shows that the weighted average cost of capital (WACC) for nuclear projects in advanced economies often exceeds 8-10%, compared to 3-5% for projects in China or for nuclear projects backed by strong government support. This difference in financing costs can make a nuclear project economically viable or unviable, independent of construction costs.

The workforce and supply chain question

Even if financing and technology challenges are addressed, nuclear faces a more prosaic but equally critical challenge: workforce and supply chain capacity. The NEI survey identifies planned capital investments of over $22 billion industry-wide over the next decade for the existing US fleet alone. New construction and SMR deployment would require far more.

The nuclear industry needs skilled workers across multiple specialties - engineers, welders, operators, regulatory specialists, and construction managers with nuclear-specific expertise. Many of these roles require years of training and certification. The current workforce is aging, with significant retirements expected over the next decade. Meanwhile, the pipeline of new talent has been constrained by decades of limited nuclear construction activity.

Supply chains face similar challenges. Manufacturing specialized components for nuclear reactors requires facilities that meet exacting quality and safety standards. Many vendors exited the market during nuclear's doldrums. Rebuilding this industrial base - or creating new supply chains for SMRs - will require time, investment, and coordination.

The IEA report emphasizes that "planning for workforce challenges in advance is necessary to avoid bottlenecks" and that "the next era of nuclear energy calls for efficient and diversified supply chains." These aren't glamorous issues, but they're foundational to nuclear's ability to scale.

A geopolitical dimension

Nuclear energy's renaissance is unfolding against a backdrop of intensifying geopolitical competition. China's dominant position in nuclear construction isn't accidental - it reflects deliberate industrial policy and strategic investment over decades. China controls an increasingly large share of the uranium fuel cycle, from mining to enrichment to fuel fabrication.

Russia, despite its international isolation following the invasion of Ukraine, remains a critical player. Russian state corporation Rosatom is involved in nuclear projects across multiple countries, particularly in emerging markets where Western alternatives face financing or political challenges.

This concentration creates dependencies that many countries find uncomfortable. The IEA report notes that "highly concentrated markets for nuclear technologies, as well as for uranium production and enrichment, represent a risk factor for the future and underscore the need for greater diversity in supply chains."

For Western nations committed to nuclear power as part of their energy mix, this raises questions about supply chain resilience and energy security—the very issues nuclear power is meant to address. The path forward likely requires substantial investment in rebuilding domestic nuclear industrial capacity, a process that will take years and significant resources.

The policy imperative

Given these challenges, nuclear's ability to fulfill its potential depends fundamentally on policy. The good news is that policy support is strengthening. Over 40 countries now support expanding nuclear power, and a multi-country initiative aims to triple global nuclear capacity by 2050.

In the United States, the ADVANCE Act passed in 2024 provides Congressional direction to the NRC to modernize regulatory processes, potentially reducing licensing costs and timelines. Four Executive Orders issued in May 2025 focus on accelerating nuclear deployment across multiple dimensions—NRC reform, fuel supply growth, DOE and DOD deployment of advanced nuclear, used fuel policy, nuclear exports, and workforce development.

Yet effective policy requires more than supportive statements. It demands:

• Regulatory efficiency without compromising safety. The NRC has made progress—license renewal applications are being processed nearly 50% faster, reliably under 18 months. But the agency faces a surge of applications for power uprates and new reactors. Maintaining safety standards while processing this volume will test the agency's capacity.
• Financial de-risking mechanisms. Government support that reduces financing costs and provides downside protection against construction risk can make projects viable. Various models exist—from direct government financing (as in China) to loan guarantees and power purchase agreements. Finding approaches that mobilize private capital while protecting taxpayers and consumers requires sophisticated policy design.
• Workforce and supply chain development. This includes funding for training programs, support for manufacturing facility development, and coordination between industry and educational institutions. It's less politically visible than reactor construction but equally essential.
• Long-term policy stability. The nuclear industry makes decisions on decade-long timescales. Policy volatility—whether in tax credits, regulations, or support programs—undermines long-term planning and investment. Nothing is more damaging to nuclear development than stop-start policy cycles.
• International coordination. Harmonizing safety standards, sharing regulatory best practices, and coordinating R&D can reduce costs and accelerate deployment. This is particularly important for SMRs, where standardized designs could serve multiple markets.

My assessment: qualified optimism

Having analyzed energy markets for years, I find myself cautiously optimistic about nuclear's prospects, though my optimism is tempered by an understanding of the formidable obstacles ahead.

The case for nuclear in a deeply decarbonized energy system is strong. We need firm, dispatchable, carbon-free power. Batteries and other storage technologies are advancing rapidly, but seasonal storage at the scale needed to back up renewables remains technically and economically challenging. Industrial heat applications, maritime propulsion, and remote power needs may be better served by nuclear than alternatives. The data center load profile - constant, predictable demand for enormous amounts of power - is almost purpose-built for nuclear.

The technology fundamentals are sound. Nuclear power has been generating electricity safely and reliably for over 70 years. The catastrophic accidents that shaped public perception -Three Mile Island, Chernobyl, Fukushima - have also driven safety improvements. Modern reactor designs incorporate passive safety features that reduce accident risk. Advanced reactors promise additional safety margins.

Where I see the greatest risk is in execution. The nuclear industry must prove - not assert - that it can deliver projects on time and on budget in Western markets. A few successful SMR deployments that meet cost and schedule targets would do more for nuclear's prospects than any number of promises or projections. Conversely, if early SMR projects experience the same delays and overruns as recent large reactors, it could set the industry back another decade.

The involvement of technology companies is significant. These are sophisticated actors with strong balance sheets, technical expertise, and low risk tolerance. If they're willing to sign contracts and invest capital, it suggests genuine confidence in nuclear's economics. However, we should be clear-eyed: these companies are motivated by their operational needs, not by climate objectives. If alternatives prove more economical or less risky, they'll pivot.

I'm encouraged by policy momentum but remain concerned about sustainability. Nuclear has enjoyed political support before, only to see it evaporate following accidents or cost overruns. The test will come when projects face inevitable challenges. Will policymakers maintain support through construction delays, budget overruns, or incidents? Or will opposition parties seize on problems to reverse course?

The workforce and supply chain issues worry me more than they seem to concern many industry advocates. These are slow-moving problems that don't yield to crash programs. You can't train experienced nuclear engineers overnight or rapidly reconstitute industrial supply chains. The industry needs to start addressing these constraints now, before they become binding bottlenecks.

Looking forward

The path to a new era for nuclear energy exists, but it's narrow and uncertain. Success requires simultaneous progress on multiple fronts: technological demonstration, cost reduction, regulatory efficiency, workforce development, supply chain rebuilding, financing innovation, and sustained policy support. Stumbles on any of these dimensions could stall momentum.

What gives me confidence that progress is possible is the fundamental strength of the use case. The world genuinely needs what nuclear offers: large-scale, firm, carbon-free power. The energy transition is revealing, not obscuring, this need. Data centers, industrial electrification, and the challenges of integrating high shares of variable renewables all point toward the value of dispatchable clean generation.

The question is whether the nuclear industry - broadly construed to include vendors, utilities, regulators, policymakers, and financiers - can rise to this moment. It will require a level of execution discipline, innovation, and coordination that has eluded the sector in recent decades, at least in Western markets.

Over the next five years, we'll see critical tests: Will early SMR projects meet their cost and schedule targets? Can the industry build large-scale reactors on budget in the US and Europe? Will regulatory reforms translate into meaningfully faster approval processes? Can financing innovations mobilize private capital at scale?

The answers to these questions will determine whether nuclear's current renaissance proves durable or whether it becomes another false dawn. The stakes extend beyond the nuclear industry itself. If nuclear cannot deliver on its promise, the path to deep decarbonization becomes significantly more difficult and expensive. If it can, we gain a powerful tool for addressing both climate change and energy security.

My view is that nuclear will play a significant role in 2050 as part of a diverse clean energy portfolio, alongside dominant renewables, various storage technologies, improved transmission, demand flexibility, and continued efficiency gains. Nuclear's specific contributions will vary by geography, shaped by resource endowments, industrial structure, political economy, and path dependencies.

The profitability paradox facing renewable manufacturers, the execution challenges confronting advanced reactors, and the complexity of the broader energy transition all point to a fundamental truth: there are no easy answers or silver bullets. Every pathway forward involves difficult tradeoffs, substantial costs, and meaningful risks. Nuclear energy is no exception.

What's different this time is that the industry appears to recognize this reality. There's less triumphalism and more pragmatism in today's nuclear advocacy. Companies are focusing on demonstrable deliverables rather than aspirational visions. Policymakers are designing more sophisticated support mechanisms. Financiers are engaging seriously with the technology while demanding rigorous risk management.

This sobriety might be nuclear's greatest asset. The industry cannot afford another cycle of over-promise and under-deliver. It needs to build credibility project by project, achieving cost and schedule targets, demonstrating safety, and earning the trust of investors, regulators, and the public.

If it can do that - if the projects under construction today and launching over the next few years prove successful - nuclear could indeed enter a new era. Not a return to the expectations of the 1950s, when nuclear would be "too cheap to meter," but something more valuable: a proven, reliable contributor to clean energy systems, economically competitive with alternatives, technically mature, and politically sustainable.

That outcome is achievable. But it's not assured. The next several years will be decisive in determining which path nuclear takes.

The analysis and views presented in this article are my own and are based on review of several authoritative sources, including the International Energy Agency's "The Path to a New Era for Nuclear Energy," the Nuclear Energy Institute's "2025 Future of Nuclear Power Survey," MIT Technology Review's "What's Next for Nuclear Power," and related industry reports. Generative AI tools were used solely to process, consolidate, and summarize data and information from these reports. I personally conducted the critical interpretation, formulated the central thesis ('nuclear's unexpected renaissance'), and provided the final perspective and conclusions.