The controversial Mühleberg nuclear power plant will be forced to shut down in the first half of next year unless it can present an acceptable maintenance plan.
The Federal Administrative Court yesterday ruled in favor of residents around the plant, who challenged an unlimited permit granted to Mühleberg by federal environment officials in 2009.
The justification by federal officials was the fact the plant would be under constant observation of the Federal Nuclear Safety Inspectorate.
The court said an unlimited permit does not excuse the plant from having a comprehensive maintenance plan, especially with known problems like that with the nuclear core shroud.
It cited cracks in the reactor as well as questions about the reliability of its cooling system.
The Federal Department of Environment said it was analyzing the decision, and considering further action.