Greenpeace activists weld to block the main entrance to the nuclear power plant Kruemmel near Geesthacht July 8, 2009, about 30 km (20 miles) south-east of Hamburg. Swedish state-owned utility company Vattenfall, which operates the Kruemmel nuclear power plant in northern Germany, turned off the reactor at midday on Saturday when a transformer short-circuited after running at half load ahead of the botched full reopening. The placard reads 'AKW Kruemmel closed due to unreliability of Vattenfall'. REUTERS/Christian Charisius (GERMANY CONFLICT ENERGY ENVIRONMENT)