Olkiluoto Nuclear Power Plant
Island Finnish nuclear power plant site including the Olkiluoto EPR
On the island of Olkiluoto in Satakunta, the Olkiluoto Nuclear Power Plant hosts multiple reactor units, including the recent EPR project. Sightseeing is limited; engineers, students and industry visitors come to view modern nuclear technology and coastal industrial landscape.
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.
How to Get to Olkiluoto Nuclear Power Plant #
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.
Tips for Visiting Olkiluoto Nuclear Power Plant #
- 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.
Best Time to Visit Olkiluoto Nuclear Power Plant #
Visit in summer for long daylight and better weather for coastal walks; formal tours must be scheduled in advance and are subject to security checks.
Weather & Climate near Olkiluoto Nuclear Power Plant #
Olkiluoto Nuclear Power Plant's climate is classified as Warm-Summer Continental - Warm-Summer Continental climate with mild summers (peaking in July) and freezing winters (coldest in February). Temperatures range from -8°C to 20°C. Moderate rainfall (575 mm/year).
January
January is freezing with highs of -2°C and lows of -7°C. Moderate rainfall (40 mm) and mostly overcast skies.
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February
February is the coldest month with highs of -2°C and lows of -8°C. The driest month with just 29 mm and mostly overcast skies.
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March
March is freezing with highs of 1°C and lows of -5°C. Moderate rainfall (33 mm) and partly cloudy skies.
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April
April is cold with highs of 6°C and lows of -1°C. Moderate rainfall (36 mm) and partly cloudy skies.
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May
May is cold with highs of 13°C and lows of 4°C. Moderate rainfall (30 mm) and partly cloudy skies.
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June
June is cool with highs of 17°C and lows of 10°C. Moderate rainfall (48 mm) and partly cloudy skies.
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July
July is cool with highs of 20°C and lows of 12°C. Moderate rainfall (65 mm) and partly cloudy skies.
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August
August is cool with highs of 18°C and lows of 12°C. The wettest month with 68 mm of rain and partly cloudy skies.
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September
September is cool with highs of 13°C and lows of 8°C. Moderate rainfall (58 mm) and partly cloudy skies.
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October
October is cold with highs of 8°C and lows of 4°C. Moderate rainfall (60 mm) and mostly overcast skies.
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November
November is cold with highs of 3°C and lows of -1°C. Moderate rainfall (58 mm), mostly overcast skies, and breezy conditions.
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December
December is freezing with highs of 0°C and lows of -5°C. Moderate rainfall (50 mm), mostly overcast skies, and breezy conditions.
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