Nordic Nuclear Power

Finnish nuclear power live

Total active power

2,051MW
56% total utilization

Last updated:

4

Active reactors

1

Maintenance

0

Outages

Finland's nuclear reactors right now

Olkiluoto 1

Eurajoki, Satakunta
Operational
98%

Current power

874

/ 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
Operational
83%

Current power

739

/ 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 dateAug 26, 2026, 11:44 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 completionOct 29, 2026

Message details

MessagePlanned
StatusMaintenanceReasonYearly maintenancePublication dateSep 7, 2026, 09:37 AMExpected completionOct 29, 2026, 10:00 PMRemarksThe power reduction of Olkiluoto 3 for the annual outage will begin on Wednesday, 9th September 2026 at 13:00. The reduction will continue on Thursday, 10th September 2026, and the unit is scheduled to disconnect from the grid at 00:00. Following the annual outage, the plant is expected to reconnect to the grid on Friday, 30th October 2026.

Loviisa 1 & 2

Loviisa, Uusimaa
Operational
43%

Current power

438

/ 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
ReasonExtended inspection outage
Expected completionSep 28, 2026

Message details

MessagePlanned
StatusMaintenanceReasonExtended inspection outagePublication dateSep 4, 2026, 01:03 PMExpected completionSep 28, 2026, 02:00 AMRemarksUpdated event end time. After the outage maximum capacity will increase from 507MW to 516MW.

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.