11 December 2020
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Vattenfall yesterday celebrated the 40th anniversary of the start of commercial operation of unit 1 at the Forsmark nuclear power plant. The Swedish utility is marking the occasion with an exhibition of photographs from the unit s construction period and its first year of operation.
Construction of unit 1 at the Forsmark plant (Image: Göran Hansson / Vattenfall)
Construction work on the 900 MWe boiling water reactor (BWR) began in October 1971. Once completed, Forsmark 1 achieved first criticality on 23 April 1980 and was connected to the grid on 6 June 1980. It entered commercial operation on 10 December 1980. Since then, the unit has been uprated to 990 MWe and has supplied a total of about 280 TWh of electricity.