If you look only at the percentage, 2024 seems like a good year for nuclear energy in Europe. Output is up. The decline has stopped. Nuclear power still delivers nearly a quarter of the EU’s electricity. But the deeper story is not about growth. It is about how fragile the balance has become.
According to Eurostat, nuclear power plants in the European Union generated 649,524 GWh of electricity in 2024, a 4.8% increase compared with the previous year. This marked the second consecutive rise after the sharp drop in 2022. In the EU-wide electricity mix, nuclear accounted for 23.3% of total generation.
Those figures matter. Yet they say more about recovery from disruption than about long-term direction.
A Comeback Shaped by Circumstances, Not Strategy
The improvement in 2024 did not come from new reactors, new investment waves or a coordinated European nuclear push. It came from something far more prosaic: reactors working more consistently than they did a year earlier.
Much of the EU’s nuclear fleet is ageing. Maintenance schedules are longer. Unplanned outages are more disruptive. When availability improves, production rises quickly. When it does not, the numbers fall just as fast. That is exactly what played out in 2024.
France Still Carries the System
No country illustrates this dynamic more clearly than France.
France alone generated 380,451 GWh of nuclear electricity in 2024, accounting for 58.6% of all nuclear power produced in the EU. The country’s output rose by 12.5% year on year, making it the single largest contributor to the EU-wide increase.
This rebound followed a period marked by corrosion-related inspections and prolonged maintenance outages. In other words, France did not expand its nuclear sector—it simply brought more of its existing capacity back online.
The implication is unavoidable: EU nuclear performance still rises and falls with France. Few other parts of the European energy system are so dependent on the operational health of a single national fleet.
A Steep Drop After the Top Tier
Once France is taken out of the picture, the scale changes rapidly.
Spain produced 54,510 GWh, followed by Sweden with 50,665 GWh, and Finland with 32,599 GWh. Together with France, these four countries generated close to 80% of all nuclear electricity in the EU.
Beyond them, nuclear becomes a much smaller contributor: important nationally, but limited in its ability to shape EU-wide outcomes.
Different Countries, Different Realities
The year-on-year picture across the rest of the EU is uneven.
Some countries saw modest increases. Others recorded declines. On average, nuclear-producing states outside the main growth drivers experienced a fall of around 4% in output, with results ranging from slight decreases to double-digit drops.
These differences reflect national circumstances rather than a shared trend. Reactor age, licensing decisions, political choices and maintenance timing all play a role. What they do not reflect is a common European nuclear trajectory.
Instead, Europe’s nuclear sector looks increasingly like a patchwork of national systems, moving in different directions under different constraints.
Nuclear Dependence: A Divided Continent
The contrast becomes even clearer when nuclear is measured as a share of national electricity production.
In France, nuclear power supplied 67.3% of total electricity generation in 2024. Slovakia followed with 61.6%, making nuclear the backbone of its power system.
In Hungary, Bulgaria, Belgium, Finland and Czechia, nuclear provided roughly 40% of electricity output. In these countries, nuclear acts as a stabilising force when wind and solar generation fluctuate.
Elsewhere, its role is marginal. In the Netherlands, nuclear accounted for just 2.9% of electricity production.
Life After Germany’s Nuclear Exit
The 2024 data also reflect a structural change that is now fully embedded in the EU system: Germany’s nuclear phase-out.
Until 2021, Germany was the EU’s second-largest nuclear producer. Its complete exit in April 2023 has reshaped the balance of power generation across the bloc. Nuclear output is now more geographically concentrated, increasing reliance on cross-border electricity flows and on other low-carbon sources to maintain system stability.
What 2024 Really Tells Us?
The lesson from 2024 is not that nuclear power is surging back. It is that the system has regained its footing after a period of stress.
Nuclear energy continues to play a critical role in Europe’s electricity mix, especially as electrification accelerates and renewables expand. At the same time, its future remains constrained by ageing infrastructure, long investment timelines and sharply diverging national policies.
For Power Loop, the message is clear: 2024 was a year of recovery, not transformation. Nuclear power is still holding the line, but it is doing so within limits that are becoming harder to ignore.
