Nordic Nuclear Power

Finnish nuclear power live

Total active power

2,067MW
56% total utilization

Last updated:

Ramping up: 2

Reduced output: 1

4

Active reactors

1

Maintenance

0

Outages

Finland's nuclear reactors right now

Olkiluoto 1

Eurajoki, Satakunta
Operational
97%

Current power

861

/ 890 MW

Reactor typeBoiling water reactor
A boiling water reactor (BWR) allows water to boil directly in the reactor, creating steam that drives the turbines. This is a simpler design but requires the turbines to handle radioactive steam.
Operators

Teollisuuden Voima Oyj

Olkiluoto 2

Eurajoki, Satakunta
Reduced output
83%

Current power

740

/ 890 MW

Reactor typeBoiling water reactor
A boiling water reactor (BWR) allows water to boil directly in the reactor, creating steam that drives the turbines. This is a simpler design but requires the turbines to handle radioactive steam.
Operators

Teollisuuden Voima Oyj

Planned
ReasonGenerator rotor limitation
Expected completionApr 18, 2027

Message details

MessagePlanned
StatusFailureReasonGenerator rotor limitationPublication dateOct 13, 2026, 10:17 AMExpected completionApr 18, 2027, 03:00 PMRemarksThe maximum power of OL2 is limited due to rotor limitation.

Olkiluoto 3

Eurajoki, Satakunta
Maintenance
0%

Current power

0

/ 1,600 MW

Reactor typePressurized water reactor
A pressurized water reactor (PWR) uses pressurized water as a coolant to prevent boiling. This water transfers heat to a secondary circuit that drives the turbines, ensuring that radioactive water never reaches the turbines.
Operators

Teollisuuden Voima Oyj

Planned
ReasonYearly maintenance
Expected completionNov 7, 2026

Message details

MessagePlanned
StatusMaintenanceReasonYearly maintenancePublication dateOct 18, 2026, 12:38 PMExpected completionNov 7, 2026, 04:00 PMRemarksThe new estimated grid connection time for Olkiluoto 3 following the annual outage is Saturday, 7 November 2026 at 18:00. After the grid connection, the unit will be technically available for power increase. The power increase will proceed according to the production plan.

Loviisa 1 & 2

Loviisa, Uusimaa
Ramping up
46%

Current power

466

/ 1,014 MW

Reactor typePressurized water reactor
A pressurized water reactor (PWR) uses pressurized water as a coolant to prevent boiling. This water transfers heat to a secondary circuit that drives the turbines, ensuring that radioactive water never reaches the turbines.
Operators

Fortum Power and Heat Oy

Planned
ReasonNormal refueling outage
Expected completionOct 27, 2026

Message details

MessagePlanned
StatusMaintenanceReasonNormal refueling outagePublication dateOct 27, 2026, 02:36 PMExpected completionOct 27, 2026, 09:00 PMRemarksUpdated event stop time and schedule. The first generator will be technically available 27.10. at 17:00 and the second generator will be technically available 27.10. at 22:00. After event stop the plant will be technically available and upon a decision to resume production, full capacity can be reached within approx. 48 hours.

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Nuclear power in Finland: current reactor status

Finland has five nuclear reactors in commercial operation at two power plants: Olkiluoto 1, 2 and 3 in Eurajoki and Loviisa 1 and 2 in Uusimaa. Olkiluoto's three reactors are shown individually using TVO data, while Loviisa's two reactors are combined into one shared card.

Nuclear power in Finland

Nuclear power supplies around 40 percent of Finland's electricity – one of the highest shares in the world. Olkiluoto in Eurajoki has three reactors: two boiling water reactors and the Olkiluoto 3 pressurized water reactor, Europe's largest reactor, which entered commercial operation in 2023. Loviisa has two VVER-440 pressurized water reactors.

The Finnish view combines operator data from TVO with Fingrid's measurement of Finland's total nuclear generation. Nordic Nuclear Power is independent of both organizations.

Finland's nuclear power plants

Olkiluoto nuclear power plant

Olkiluoto nuclear power plant in Eurajoki operates three reactors. Olkiluoto 1 and 2 are boiling water reactors with a net output of 890 MW each. Olkiluoto 3 is an EPR pressurized water reactor with a net output of 1,600 MW.

Location

Eurajoki, Satakunta, Finland

Type

BWR (OL1–2), PWR/EPR (OL3)

Operators

Teollisuuden Voima Oyj (TVO)

View reactor status

Loviisa nuclear power plant

Loviisa nuclear power plant operates two VVER-440 pressurized water reactors with a net output of 507 MW each. Because the real-time source used here does not split generation by unit, the plant's calculated total is shown as one combined card.

Location

Loviisa, Uusimaa, Finland

Type

Two pressurized water reactors (VVER-440)

Operators

Fortum Power and Heat Oy

View reactor status

Frequently asked questions about Finnish nuclear power

Which nuclear power plants are there in Finland?

Two plants are in operation: TVO's Olkiluoto in Eurajoki and Fortum's Loviisa in eastern Uusimaa. Fennovoima's planned Hanhikivi plant in Pyhäjoki was cancelled in 2022.

How many nuclear reactors operate in Finland?

Finland has five reactors in commercial operation: three at Olkiluoto and two at Loviisa.

How much of Finland's electricity comes from nuclear power?

Around 40 percent, one of the highest shares in the world. Olkiluoto 3 alone supplies about 14 percent of Finland's electricity.

How often is the Finnish data updated?

Fingrid's nuclear generation total updates every three minutes. This service briefly caches the data to use the source responsibly.

Data sources and reliability

All power data presented on this page comes from official data sources. Power data for Olkiluoto 1–3 comes directly from Teollisuuden Voima Oyj (TVO), while Finland's total nuclear generation comes from Fingrid. Loviisa's combined value is calculated by subtracting Olkiluoto 1–3 from Fingrid's total. Data related to maintenance and outages comes from the Nord Pool UMM platform (Urgent Market Messages), a European platform for sharing information about maintenance and outages on the power grid. This ensures accurate, up-to-date information about Finland's nuclear power generation.

Data sources include Teollisuuden Voima Oyj (TVO), Fingrid Open Data, and the Nord Pool UMM Platform, providing comprehensive coverage of all Finnish nuclear reactors. Fingrid data is used under CC BY 4.0, and the Loviisa calculation is a modification of the source data made by Nordic Nuclear Power.