Swedish energy group Vattenfall is demanding 4.7 billion euros ($6.0 billion) in damages from Germany following Berlin's decision to phase out nuclear power and shut several reactors, German government sources said on Wednesday.
The sources said that Economy Minister Sigmar Gabriel had named the figure at a meeting of the parliamentary economics committee on Wednesday.
Swedish media reports back in December 2012 had put the figure at 3.5 billion euros in damages.
Following the Fukushima disaster in Japan in 2011, the German government announced it would phase out nuclear power completely and immediately shuttered several nuclear reactors, including the plants in Brunsbuettel and Kruemmel in the north of the country that were jointly owned by Vattenfall and Germany's E.ON.
At the time, the two plants had a history of technical problems and had been out of service since 2007 and 2009, respectively.
Vattenfall claims its right of ownership was violated by Berlin's decision.