Waste for disposal will come from five reactors, four currently operating plus the large Olkiluoto 3 reactor under construction nearby on the Baltic coast. Finland, highly dependent on Russian gas, is one of the first countries in Europe to revive nuclear power.
The £2bn turnkey project is under construction by a FrancoGerman joint venture of Areva NP (formerly Framatome) and Siemens and uses the latest variant of the pressurised water reactor, the European PWR. Bouygues is the main civils contractor.
The reactor will have a capacity of 1,650MW, almost equalling the two 840MW units which TVO already operates at the site.
Two reactors of 488MW capacity each are operated by Fortum at Loviisa in the Gulf of Finland.
Work on Olkiluoto 3, the first reactor to be built in Europe for some time, is over six months behind schedule. Concrete quality problems earlier this year, and a long learning curve for various suppliers for the components, are cited by the joint venture.