Wedoany.com Report-May 11, Teollisuuden Voima Oyj (TVO) has completed the replacement of a faulty rotor in the generator of Unit 2 at Finland’s Olkiluoto Nuclear Power Plant (OL2), an 890 MWe facility. The repair follows a production halt on April 15, caused by elevated moisture levels detected in the turbine island’s generator. To ensure operational stability, electricity output at OL2 has been reduced to 735 MWe, a precautionary measure to minimize the risk of rotor failure. This reduced power level is expected to continue until the next annual outage in 2026.

The replacement rotor, a refurbished spare, is the last available in TVO’s inventory. “The replacement rotor is a refurbished spare part and is the last available rotor in TVO’s inventory,” a TVO spokesperson confirmed, highlighting the critical nature of the repair. The power restriction reflects a careful approach to maintaining the unit’s reliability while using the spare component.

OL2’s regular annual maintenance outage, lasting approximately three weeks, is set to begin on May 25. This scheduled downtime will allow for further inspections and maintenance to ensure the unit’s long-term performance. The reduced output in the interim aims to balance operational safety with the need to supply electricity to the grid.

The Olkiluoto Nuclear Power Plant remains a key component of Finland’s energy infrastructure, and TVO’s proactive measures demonstrate a commitment to maintaining safe and reliable operations. The rotor replacement and power adjustment ensure that OL2 continues to contribute to the region’s energy needs while addressing technical challenges. By planning for the 2026 outage, TVO aims to restore full capacity and enhance the unit’s resilience.

This development underscores the importance of robust maintenance strategies in nuclear power operations. TVO’s careful management of the situation at OL2 supports the ongoing delivery of electricity to Finland’s grid, with a focus on safety and sustainability until the next scheduled maintenance period.