Swiss Nuclear Plants Could Run for 80 Years, Government Study Finds

Switzerland is rewriting its energy playbook with a bold declaration: the nation’s nuclear heart could beat for 80 years. A groundbreaking government report has just shattered the long-held assumption that the Gösgen and Leibstadt plants were destined for retirement at 60. This 20-year extension represents a massive shift in the Federal Council's strategy, moving from managed decline to aggressive longevity. The study, sparked by a Senate postulate, confirms that keeping these reactors humming is not just a pipe dream but a technical reality. While the world grapples with energy volatility, Switzerland is doubling down on its existing infrastructure, effectively buying two decades of carbon-free baseload power. This isn't just a minor adjustment; it is a fundamental reimagining of the Swiss energy grid that confronts the looming threat of winter power shortages head-on.

The numbers are in, and the verdict is staggering: extending the life of Switzerland’s nuclear fleet is 'for the large part' economically viable. The Federal Council asserts that the massive investments required for technical upgrades are not only necessary but will likely be highly profitable. In a surprising twist, the government currently sees no need for public financial support, suggesting that the private sector—led by giants like Axpo—can shoulder the burden of modernization. Thomas Sieber, head of Axpo, has already signaled his confidence, backing the 80-year horizon as a realistic goal. This fiscal confidence contrasts sharply with the soaring costs of building new renewable infrastructure from scratch. By squeezing every megawatt-hour out of Gösgen and Leibstadt, Switzerland avoids the immediate, multi-billion-franc bill of total decommissioning while maintaining a stable price environment for its industrial sectors.

Time is the one resource Switzerland cannot manufacture, and the clock is ticking toward a critical 2029 deadline. By that year, a definitive 'stay or go' decision must be made for the Gösgen plant in canton Solothurn. While the Leibstadt plant in Aargau also sits in the crosshairs of this new policy, the immediate pressure is on Gösgen’s operators to prove they can meet the rigorous safety standards required for an octogenarian lifespan. However, the path isn't uniform across the sector; Axpo has already confirmed that the Beznau plant will still face the axe after 60 years. This creates a fascinating tension within the Swiss energy landscape—a tale of two strategies where some aging giants are retired while others are reborn. The next five years will be a frantic period of inspections, retrofitting, and political maneuvering as cantonal authorities and federal regulators align their visions.

This report arrives as a political firestorm gathers pace in Bern. Only weeks ago, a Swiss parliamentary committee signaled its intent to lift the ban on building new nuclear plants entirely. The 80-year extension serves as a bridge, linking the current fleet to a future where nuclear power remains a cornerstone of the Swiss 'Energy Strategy 2050'. By extending the life of current assets, Switzerland buys itself the luxury of time—time to debate new builds and time to integrate more renewables without risking blackouts. Critics argue that this move delays the transition to wind and solar, while proponents insist that nuclear is the only way to meet climate targets while ensuring energy sovereignty in a volatile Europe. As the Federal Council pivots, the message to the world is clear: Switzerland is not ready to turn out the lights on nuclear power. The implications for the nation's carbon footprint and economic stability will be felt for the rest of the century.