Nuclear energy in Finland

Nuclear power is the biggest single source of energy in the Finnish electricity production.

Current nuclear energy power plants

Finland has four operational nuclear units at the moment in two nuclear power plants. The nuclear power plant of Teollisuuden Voima Oy is composed of two power plant units Olkiluoto 1 and Olkiluoto 2. Both are situated at Olkiluoto in Eurajoki. Two reactors Loviisa 1 and Loviisa 2 of Fortum Power and Heat Oy are situated in Loviisa.

Loviisa 1 and 2

Nuclear power units in Loviisa are Soviet Union suppliers’ V/O Atomenergoexport’s (AEE) VVER-440 type pressurized water reactors (PWR). After modernization project in 1995 Loviisas’ electric output is 488 MW per unit and heat output is 1500 MW per unit. Electricity production at the Loviisa is about 8 TWh per year.

Olkiluoto 1 and 2

For the first two Olkiluoto units have been made modernization projects in three decades. After the latest modernization the electricity power has upgraded from 860 MW to 880 MW. Olkiluoto 1 and 2 are Swedish AB Asea Atoms’ (current Westinghouse Electric Sweden AB) identical boiling water reactors (BWR). Olkiluoto produces approximately 14 TWh per year at the moment that covers 16 % Finland’s whole used electricity.
Olkiluoto 3

Olkiluoto 3 is under construction and it is EPR design, an advanced pressurized water reactor that consortium of French Areva NP and German Siemens AG supplies.

New nuclear power projects

Decisions in Principle for the construction of 2 new nuclear reactors were approved by the Parliament on July 1, 2010. Decisions were granted to TVO and Fennovoima.
  • TVO - Olkiluoto 4 (suspended)
  • Fennovoima: Hanhikivi 1

According to a decision-in-principle a possible construction permit applications must be left at the latest year 2015. In addition Posiva’s application for a decision in principle to construct an expansion to final disposal of used nuclear facility in Eurajoki has been granted. Posiva Oy, which was set up in 1995 as a joint venture company –TVO and Fortum, is responsible of its owner’s final disposal of used nuclear fuel and a related research and consultant tasks. The final disposal of used nuclear fuel the underground rock characterization facility is named as ONKALO and it is situated at the Eurajoki site.

Rakenteilla oleva Olkiluoto 3 (kuva: TVO)