Nordic Nuclear Power

Loviisa nuclear power plant live

Total active power

479MW
47% total utilization

Last updated:

2

Active reactors

0

Maintenance

0

Outages

Reactors at Loviisa

Loviisa 1 & 2

Loviisa, Uusimaa
Operational
47%

Current power

479

/ 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.

About Loviisa nuclear power plant

Loviisa nuclear power plant is located on Hästholmen island in Loviisa, eastern Uusimaa, and is operated by Fortum. Its two Soviet-designed VVER-440 pressurized water reactors were commissioned in 1977 and 1980 and deliver about 507 MW each – together roughly ten percent of Finland's electricity. In February 2023 Loviisa was granted an operating licence until the end of 2050.

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.

Loviisa at a glance

Location
Loviisa, Uusimaa, Finland
Type
Two pressurized water reactors (VVER-440)
Operators
Fortum Power and Heat Oy

Frequently asked questions about Loviisa

How many reactors does Loviisa have?

Two: Loviisa 1 and Loviisa 2, VVER-440 pressurized water reactors with a net output of 507 MW each.

How is Loviisa's output calculated?

Loviisa's combined output is calculated by subtracting TVO's current Olkiluoto 1–3 output from Fingrid's measurement of Finland's total nuclear generation.

Why are Loviisa 1 and 2 combined?

Fingrid's real-time series reports the national total rather than separate values for Loviisa's two reactors. A combined card avoids splitting the calculated value between units without supporting source data.

How long can Loviisa keep operating?

In 2023 the Finnish Government granted both reactors a new operating licence valid until the end of 2050.

Other 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
All Finnish reactors

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.