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
Finland runs 1 operating unit on PWR (square-lattice) fuel. 6 fabricators are documented for it. No documented fabricator is based in Finland. Country exposure
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