London — Finland's 880 MW Olkiluoto 1 nuclear plant will be re-connected to the grid Tuesday after a defective turbine valve caused a reactor stall Monday, operator TVO said Tuesday.
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The unit was disconnected from the network at 22:48 CET (2148 GMT) Monday when a turbine valve failed. The event had no nuclear safety implications, TVO said.
The reactor is to return to full power through the week, reaching 80% power Wednesday and full power Friday, the operator said.
TVO's Olkiluoto 1 and Olkiluoto 2 boiling water reactors units are identical, the first connected in September 1978, the second in February 1980.
The two units produced 13.4 TWh in 2017 with a combined load factor of 87.2%. The site provides 16% of all the electricity consumed in Finland.
A third unit, Olkiluoto 3, is due to connect to the grid in September, 2019. The 1.6 GW EPR plant was originally due online in 2009 after a four-year construction period.
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