The Mühleberg atomic plant near Bern will lose its operating licence at the end of June 2013 on security grounds, the Federal Administrative Court has ruled.
The court upheld a complaint by local opponents of the plant against the indefinite extension of the plant's licence by the environment ministry, granted at the end of 2009.
The 1972 plant, one of the oldest in Switzerland, is run by BKW Energy. Last September it was restarted after three months of annual checks and safety improvements.
Before the court’s ruling, Mühleberg's licence was open-ended as long as it met national nuclear safety requirements.
All Swiss atomic plants are due to be decommissioned by 2034, in line with the government’s decision to opt out of atomic energy, announced last May.
In the wake of last year’s crisis at the Fukushima nuclear power plant in Japan, the Swiss government suspended all applications for the building of new power plants and ordered a review of options for the country’s energy mix in the future.
swissinfo.ch and agencies