Olkiluoto nuclear power plant 3
Olkiluoto nuclear power plant 3 is a pressurised water reactor unit at Olkiluoto nuclear power plant in Finland rated at 1,720 MW gross. It is operating. Commercial operation began 16 Apr 2023.
GNPT gives a commercial operation date of 1 January 2022, before the unit's own grid connection on 12 March 2022. The World Nuclear Association database lists regular (commercial) operation from 16 April 2023, after the trial-operation period that followed the grid connection. The start year follows the commercial date.
commercial_operation:
2022-01-01 → 2023-04-16
· World Nuclear Association, Nuclear Reactor Database, Olkiluoto 3
· verified 2026-10-22
GNPT gives a commercial operation date of 1 January 2022, before the unit's own grid connection on 12 March 2022. The World Nuclear Association database lists regular (commercial) operation from 16 April 2023, after the trial-operation period that followed the grid connection. The start year follows the commercial date.
start_year:
2022 → 2023
· World Nuclear Association, Nuclear Reactor Database, Olkiluoto 3
· verified 2026-10-22
| Reactor type | Pressurised water reactor (PWR) |
|---|---|
| Model | EPR |
| Size | Largeabove 300 MWe |
| Coolant | Light water |
| Moderator | Light water |
| Gross capacity | 1,720MW |
| Net capacity (reference) | 1,600MW |
| Net capacity (design) | 1,600MW |
| Thermal output | 4,300MWt |
| NSSS vendor | Framatomeall vendors |
| Typical enrichment | 3–5% U-235 |
| Site | Olkiluoto nuclear power plant |
|---|---|
| Unit | 3 |
| Country | Finland |
| Owner | Teollisuuden Voima Oyj100% |
| Operator | Teollisuuden Voima |
| Coordinates | 61.2356, 21.4372 |
- China National Nuclear Corporation PWR fuel assemblies
- ENUSA Industrias Avanzadas PWR and BWR fuel assemblies
- Framatome PWR fuel assemblies
- KEPCO Nuclear Fuel PWR fuel assemblies
- Mitsubishi Heavy Industries PWR fuel assemblies
- Westinghouse Electric Company PWR fuel assemblies
Enriched fuel means this unit sits downstream of five conversion plants and four enrichment operators holding 88% of world capacity between the top three.
Timeline
- 12 Aug 2005Construction start
- 21 Dec 2021First criticality
- 12 Mar 2022Grid connection
- 16 Apr 2023Commercial operation
Other units at Olkiluoto nuclear power plant
| Unit | Status | Gross MW |
|---|---|---|
| Olkiluoto nuclear power plant 1 | 920 | |
| Olkiluoto nuclear power plant 2 | 920 | |
| Olkiluoto nuclear power plant 4 | Cancelled | 1,830 |
Other EPR units
20 units worldwide share this model designation.
| Unit | Country | Status | Gross MW |
|---|---|---|---|
| Flamanville nuclear power plant 3 | France | 1,650 | |
| Amarillo nuclear power plant 1 | United States | Cancelled | 1,710 |
| Amarillo nuclear power plant 2 | United States | Cancelled | 1,710 |
| Bell Bend nuclear power plant | United States | Cancelled | 1,600 |
| Callaway nuclear power plant 2A | United States | Cancelled | 1,600 |
| Calvert Cliffs nuclear power plant 3 | United States | Cancelled | 1,600 |
| Idaho Energy Complex nuclear power plant | United States | Cancelled | 1,600 |
| Jaitapur nuclear power plant 1 | India | Announced | 1,730 |
| Jaitapur nuclear power plant 2 | India | Announced | 1,730 |
| Jaitapur nuclear power plant 3 | India | Announced | 1,730 |
| Jaitapur nuclear power plant 4 | India | Announced | 1,730 |
| Jaitapur nuclear power plant 5 | India | Announced | 1,730 |
Sources
- Global Nuclear Power Tracker, Global Energy Monitor, August 2026 release , CC BY 4.0 · retrieved 2026-09-06 · this unit last researched by GEM on 2024-05-08
- GEM.wiki entry (further reading) , CC BY-SA 4.0, linked, not quoted
How these sources are used, including the corrections applied on top of them and what is deliberately left blank · download the underlying data