Switzerland does not need new nuclear power stations to complete the energy transition, according to a report by 19 energy specialists from ETH Zurich and the Paul Scherrer Institute (PSI), the country’s leading nuclear-research centre. They conclude that a system based on hydropower and solar energy, supplemented by wind power and electricity storage, can provide a secure supply without building new reactors.
The researchers do not dismiss nuclear power altogether. They argue that new reactors could reduce Switzerland’s dependence on imported electricity during the winter and therefore remain a legitimate option. But they conclude that the economic and political hurdles are formidable.
For new nuclear plants to become commercially viable, several conditions would need to be met. The technology would require substantial government support, as other low-carbon energy sources already receive. Investors would also need state guarantees to cover the financial risks. Above all, construction costs would have to fall well below those of recently completed projects in France and Finland, both of which suffered major delays and cost overruns.
The report reinforces conclusions reached in two other recent assessments: a review by the Swiss Academies of Sciences published last year and an analysis by the energy company Axpo earlier this year. All three conclude that new nuclear power is technically possible but highly uncertain. The main obstacles are economic rather than technological. Any serious accident abroad, similar to the Fukushima disaster, could also rapidly alter the political climate.
The studies also agree that Switzerland has credible alternatives. Expanding solar generation is generally regarded as quicker, cheaper and politically easier than building new reactors. Continued investment in battery and other storage technologies could increasingly offset the intermittent nature of renewable electricity generation.
The debate is therefore less about whether nuclear power is technically feasible than whether it represents the most practical route to decarbonisation. The Federal Council and a majority in Parliament have recently backed lifting the ban on new nuclear power stations. Because the change would almost certainly face a referendum, the final decision is likely to rest with Swiss voters.
The three reports are also sceptical about the prospects for so-called Generation IV reactors. Advocates argue that these designs will be safer, cheaper and produce less radioactive waste. But for now those claims remain largely theoretical. Axpo, together with most of the scientists involved in the latest studies, concludes that such reactors are unlikely to make a meaningful contribution to Switzerland’s electricity supply before 2050.
More on this:
ETH Zurich study (in English)
For more stories like this on Switzerland follow us on Facebook and X.
