The outage was caused by maintenance work carried out by Svenska kraftnät at a power station in the main grid north of Stockholm, work that went wrong and caused a short circuit. It had major consequences for the power supply in the capital region because the station feeds electricity there.
This has led, among other things, to production for two of the nuclear power reactors at Forsmark in Uppland decreasing.
– The electricity production at Forsmark 1 and 2 is temporarily stopped after a fault on the external electricity grid, but the electricity production continues as usual at Forsmark 3, says Josef Nylén, press manager at Forsmark.
Affects the electricity price
When the two stopped reactors can produce fully again is still unclear.
– We are doing in-depth analysis right now to make sure that our facilities are intact and that everything is operational before we can restart reactors 1 and 2, says Josef Nylén.
The disconnection will have an effect on electricity production and prices, says Erik Ek, strategic operations manager at Svenska kraftnät.
-The production that does not come from Forsmark may be replaced by other electricity and that will of course affect the electricity price.
The daily prices for electricity on the Nordic electricity exchange are set one day in advance, and Thursday’s prices will be roughly double in the whole of Sweden compared to Wednesday. From a price of 64 öre per kilowatt hour to between 112 and 127 öre in northern and southern Sweden respectively.
Forsmark’s reactor 3 has not been affected by the power outage.
Disturbances in traffic
The blackout has also caused disruption to public transport in Stockholm.
The power outage also had effects beyond Sweden’s borders. The Maritime Museum in Mariehamn, on Åland, was hit during the morning, reports SR P4 Stockholm.
– My colleague told me that all the lights were on when she arrived in the morning and that our fire doors were stuck, says Sanna Karlsson, an employee at the museum, to the radio.