Finland's much-delayed Olkiluoto 3 (OL3) nuclear reactor, Europe's largest, began regular output early on Sunday, its operator said, boosting energy security in a region to which Russia has cut gas and power supplies.
Nuclear power remains controversial in Europe, primarily due to safety concerns, and news of OL3's start-up comes as Germany on Saturday switches off its last three remaining reactors, while Sweden, France, Britain and others plan new developments.
