Olkiluoto Nuclear Power Plant Island

Address: Olkiluoto, Eurajoki, Satakunta, Finland

Website: https://www.tvo.fi/en

The Olkiluoto Nuclear Power Plant is a multi-reactor power station on Olkiluoto island in Eurajoki, on Finland’s west coast. It is a principal site for Finland’s nuclear electricity generation and also the location of the country’s long-term spent-fuel disposal project.

The site hosts several reactor units of different designs, including two older boiling-water reactors and a later-generation pressurised-reactor unit. In parallel with power generation, the Onkalo deep geological repository has been developed at the site for the underground disposal of spent nuclear fuel.

Olkiluoto is sited on a rocky island in the Bothnian Sea region and is accessed from the mainland by road; the surrounding landscape is coastal and industrial in character, with the plant prominent on the island’s shoreline.

• Power generation and fuel disposal: The site combines electricity generation with Finland’s national spent-fuel disposal project; Onkalo is one of the first deep geological repositories developed for commercial spent nuclear fuel.

What to See#

• Onkalo repository: The Onkalo deep geological repository site located on the island, developed for the long-term disposal of spent nuclear fuel and featuring underground tunnels and engineered barriers.
• Reactor units: The operating reactor complex on the island comprises older boiling-water reactors alongside a newer generation reactor unit that was added to increase site capacity.

Olkiluoto is on the west coast of Finland near Eurajoki. Access to the plant itself is restricted and requires arrangement through the operator (TVO) for guided tours. The nearest major towns are Rauma and Pori, both reachable by road; local buses and taxis serve the area.

• The Olkiluoto plant operates visitor centres with guided tours by appointment; book well in advance and expect ID checks.
• Bring photographic restraint: security rules prohibit photography in many operational areas.
• Combine the visit with a coastal walk around the island for views of the plant in the landscape - observe public footpaths and signage.