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Fault causes Swedish nuclear outages

  • Spanish Market: Electricity
  • 26/04/23

Swedish utility Vattenfall's 1.09GW Forsmark 1 and 1.12GW Forsmark 2 reactors were disconnected early this morning after a fault occurred during maintenance being carried out by transmission system operator (TSO) Svenska Kraftnat in the north of Stockholm, according to the TSO.

Both plants came off line at 06:30 CET on Wednesday and are expected to remain disconnected from the network for around 17 hours, the latest Remit data show.

Sweden's automatic power reserves were connected after the outages to shore up network stability, according to Svenska Kraftnat.

"The system disruption was therefore short-lived and the operating situation is now stable again. Neither Vattenfall nor [fellow utility] Ellevio has reported disturbances in the regional network," the TSO said.

Svenska Kraftnat is trying to determine the cause of the problem.

Vattenfall raised Forsmark 1's capacity by around 50MW in autumn last year, and by a further 50MW this year. It increased Forsmark 2's capacity by around 100MW in 2013.

Nuclear generation in Sweden has averaged 5.74GW this year, slightly up from 5.73GW in 2022, but down from 5.9GW in 2021.


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