Everllence Signs Four-Year Service Deal to Support Finland's Olkiluoto-3 Reactor

Everllence PrimeServ has signed a four-year Long-Term Service Agreement with Teollisuuden Voima Oyj (TVO) to perform intermediate maintenance on the emergency backup engines at Finland's Olkiluoto-3 EPR reactor, one of the most closely watched nuclear facilities in Europe.

The agreement, announced on March 11, 2026, covers the four Pielstick 18 PA6 B engines that serve as OL3's backup power source. Although these units see limited operational use under normal conditions, the standards applied to their maintenance are anything but relaxed. The plant, which recently entered operation, must meet particularly high standards for reliability, safety, and security, making equipment upkeep a central operational challenge for TVO.

Under the turnkey contract, Everllence PrimeServ will carry out dismantling, cleaning, reconditioning, replacement of parts, and reassembly on each engine, with a hard ceiling of 30 days per unit to complete the work. The scope also includes monthly performance tests across all four engines. Around 15 specialists will be mobilized on site to execute the program.

Laurent Cado, PrimeServ Sales Manager at Everllence France, described the contract as a test of coordination under pressure. "The success of this contract is based on the coordination and responsiveness of the Everllence teams, who combine technical expertise with rigorous planning and execution in demanding conditions," Cado said. "For TVO, this ensures a reliable partner capable of maintaining the availability of its strategic equipment."

Olkiluoto-3 has long carried symbolic weight in European nuclear circles as an EPR unit that took decades to bring online. Keeping its emergency infrastructure fully serviceable from day one of commercial operation places real demands on any service contractor, and the 30-day per-unit completion limit reflects how tightly TVO expects that work to be scheduled. With approximately 15 specialists committed to the site and monthly testing built into the contract rhythm, Everllence PrimeServ's role at OL3 is both technically intensive and operationally continuous across the four-year term.