Olkiluoto 2 to return to full power output
The Olkiluoto 2 (OL2) plant unit will return to full power output of 890 megawatts. The power increase will begin on Monday 14 April 2025 at 1:00 AM, and the unit is expected to reach full power on Saturday 19 April 2025.
OL2 had previously been operated at a reduced net output of 735 megawatts to minimize risks associated with damage to the generator rotor. The damage was discovered in early September 2024, leading to a shutdown of electricity production and disconnection from the national grid. The faulty water-cooled rotor was replaced with a spare rotor, and electricity production resumed on 6 October 2024. To ensure operational reliability, production has continued at a reduced level for several months, as the rotor installed in October was the last spare rotor in TVO’s inventory.
A new spare rotor was delivered to Olkiluoto in April, enabling OL2 to resume electricity production at normal power levels.
Electricity production at Olkiluoto 1 and Olkiluoto 3 has continued normally during OL2's reduced output period. Olkiluoto 3 is currently undergoing annual outage, which is scheduled to be completed on 2 May. Olkiluoto 1’s annual outage is scheduled for 11–22 May, and Olkiluoto 2’s outage will take place between 25 May and 15 June.