The European Union is undergoing a quiet but consequential shift in how it understands nuclear energy—not as a legacy technology of the past, but as a strategic instrument for navigating an increasingly disordered world. What was once framed primarily through environmental caution and political sensitivity is now being reconsidered through the lens of security, resilience, and long-term competitiveness. The statement by Commission President Ursula von der Leyen that Europe’s post-1990s retreat from nuclear power was a “strategic mistake” reflects more than retrospective critique; it signals a structural reassessment of how energy, sovereignty, and power intersect in the current international system.
For much of the post-Cold War period, the European energy model rested on a set of assumptions that no longer hold. Cheap and reliable imports—particularly natural gas—were expected to underpin industrial growth and household stability. Markets were assumed to function with relative predictability. Geopolitics, while present, was not expected to intrude so directly into the mechanics of energy supply. These assumptions have since collapsed. The weaponization of gas flows following the 2022 invasion of Ukraine, combined with ongoing instability in key maritime chokepoints such as the Strait of Hormuz, has exposed the extent to which Europe outsourced not just supply, but control. Energy has returned to its classical role: not merely a commodity, but a lever of power.
In this context, nuclear energy offers something increasingly scarce—structural stability. Unlike fossil fuels, it does not rely on continuous imports subject to geopolitical disruption. Unlike renewables, it is not dependent on weather conditions or storage constraints. It provides baseload power: constant, predictable, and scalable. France’s experience remains instructive. With roughly two-thirds of its electricity generated from nuclear sources, it maintains comparatively lower electricity prices and retains the ability to export surplus power. This is not simply an economic advantage; it is a form of strategic autonomy.
The economic dimension of this shift is equally significant. Europe’s industrial competitiveness has come under sustained pressure from high energy costs, particularly when compared to the United States and parts of Asia. Energy-intensive sectors—manufacturing, advanced computing, electrification infrastructure—require not just clean energy, but reliable and affordable energy at scale. Nuclear power, already responsible for roughly half of the EU’s low-carbon electricity, is uniquely positioned to support this requirement. It complements renewables rather than competes with them, stabilizing grids and ensuring continuity when wind and solar output fluctuate.
At the same time, the technological frontier is evolving. The EU’s renewed focus on Small Modular Reactors (SMRs) represents an attempt to address some of the historical weaknesses of nuclear energy—namely cost, construction time, and inflexibility. SMRs promise smaller, standardized units that can be deployed more rapidly and integrated into diverse energy systems. The European Commission’s 2026 SMR strategy, supported by targeted financial guarantees, reflects an effort to position Europe not only as a user of nuclear technology, but as a developer and exporter. If successful, this would extend the strategic value of nuclear beyond energy into industrial policy and global influence.
Political attitudes across the continent are also shifting, though unevenly. Countries that once committed to phase-outs are reconsidering. Belgium has delayed its exit. Italy is reopening the debate. Sweden and the Netherlands are expanding capacity. Even in Germany, long the anchor of anti-nuclear sentiment in Europe, the tone has softened, with growing recognition that the complete abandonment of nuclear energy may have imposed strategic costs. Yet the European Union remains divided. Opposition persists in several member states, rooted in concerns over safety, waste management, and historical memory. These are not trivial concerns; they are embedded in public consciousness and political identity.
The challenges facing nuclear energy are real and cannot be dismissed. Large-scale projects have a record of delays and cost overruns, as seen in France’s Flamanville reactor and the United Kingdom’s Hinkley Point C. Nuclear infrastructure requires long planning horizons and significant upfront capital, making it ill-suited to addressing immediate energy price volatility. Waste disposal remains a technically manageable but politically sensitive issue. Supply chains, in some cases, still intersect with geopolitical dependencies the EU seeks to reduce. And there is a legitimate concern that excessive focus on nuclear could divert resources from faster-deploying renewable technologies and storage solutions.
Yet these constraints do not negate the strategic logic of reintegration. They define its limits. Nuclear energy is not a singular solution, but neither is it an optional supplement. It occupies a specific role within a broader energy architecture—one that must balance reliability, sustainability, and sovereignty. The mistake of the past was not the expansion of renewables, but the assumption that they could substitute entirely for firm, controllable power without structural consequences.
What is emerging in Europe is therefore not a return to nuclear orthodoxy, but a recalibration. Existing plants are being extended where safe to do so, preserving capacity that would be difficult and costly to replace. New projects are being considered with greater attention to standardization and cost discipline. Regulatory frameworks are gradually adapting to accommodate innovation while maintaining safety. And perhaps most importantly, nuclear energy is being repositioned within the European strategic narrative—not as an ideological exception, but as a component of resilience.
This shift reflects a deeper transformation in how Europe understands its place in the world. The era in which economic interdependence could be assumed to produce stability has given way to a landscape defined by competition, fragmentation, and the selective use of interdependence as leverage. In such an environment, energy policy becomes inseparable from questions of power. Dependence is no longer neutral; it is a potential vulnerability. Autonomy is not absolute, but it can be increased through deliberate structural choices.
The reduction of nuclear power from roughly one-third of Europe’s electricity in 1990 to around 15 percent today was not simply a technological transition. It was a strategic decision made under a different set of assumptions about risk and order. The reconsideration now underway is not an admission of failure in absolute terms, but a recognition that the context has changed. What was once seen as prudent restraint is now understood, in part, as self-imposed exposure.
A pragmatic European approach would therefore avoid both extremes. It would neither attempt to rebuild a fully nuclear-centric system nor persist in marginalizing nuclear energy as a second-class option. Instead, it would integrate nuclear into a diversified energy strategy: extending the life of existing reactors, accelerating the development of next-generation technologies such as SMRs, and pairing these with continued expansion of renewables and improvements in grid infrastructure and storage. Such a model does not eliminate risk, but it distributes it more effectively.
In the end, the question is not whether nuclear energy is perfect—it is not—but whether Europe can afford to exclude a source of power that contributes to stability in an unstable world. The answer, increasingly, is no. The ongoing shift in policy and rhetoric suggests that European leaders are beginning to align their energy strategy with the realities of a system in which security, economics, and geopolitics are once again tightly intertwined.