The Olkiluoto 3 EPR plant unit started up
First criticality of the OL3 EPR plant unit was reached on Tuesday, December 21, 2021 at 3.22 a.m. OL3 EPR’s electricity production starts when the unit will be connected to the national grid at the end of January 2022.OL3’s reactor started up today on Tuesday, December 21 at 3.22 a.m. The moment of the startup* was historical. A new nuclear power plant unit was last commissioned in Finland over 40 years ago, and even in Europe this event last occurred about 15 years ago. OL3 will produce approximately 14 percent of Finland’s electricity once regular electricity production has started. -