Olkiluoto 3 is a 1,720MW nuclear reactor planned in Satakunta, Finland. According to GlobalData, who tracks and profiles over 170,000 power plants worldwide, the nuclear reactor is currently at the under construction stage. The construction on the reactor is likely to commence in Aug, 2005. The plant proponent is expected to achieve the first power from the reactor in Mar, 2022. Subsequent to the trial runs, the reactor is expected to enter into commercial operation in Apr, 2023. Buy the profile here.


Olkiluoto 3 is a Generation III+ nuclear reactor being developed by Framatome and Siemens, are the main contractors for the project.

The 1,720MW reactor is currently owned and will be operated by Teollisuuden Voima. The company has a stake of 100%.

Olkiluoto 3 is a type of PWR reactor. It will feature 241 fuel assemblies in the core of reactor, the place where fission occurs and energy is released. The project cost is expected to be around $11,751.04m.

Development status

The reactor construction is expected to commence from Aug, 2005. Subsequent to that it will enter commercial operation by Apr, 2023.

Contractors Involved

Siemens will be the steam turbine supplier for the nuclear reactor. The reactor system is likely to be supplied by Framatome. The reactor vessel is expected to be supplied by Mitsubishi Heavy Industries. The material used for the construction of the vessel will be 16MND5. The civil works will be carried out by Bouygues Construction.

For more details on Olkiluoto 3, buy the profile here.

About Framatome

Framatome SAS (Framatome), a subsidiary of Electricite de France SA, designs and supplies nuclear equipment and steam supply systems. The company manufactures components, fuel assemblies, instrumentation, and control systems for nuclear power plants. It provides engineering and design, instrumentation and control, licensing and commissioning project management, plant performance, fuel services, aging, and asset management services. Framatome also offers outage services maintenance, components repair and replacement, and other related services. The company’s project portfolio includes Flamanville 3, Taishan 1 & 2, and Hinkley Point C. It serves defense, medical, healthcare, and other sectors. The company has operations in France, Germany, China, and the US. Framatome is headquartered in Ile-de-France, France.

About Siemens

Siemens AG (Siemens) is a technology company. Its operations span electrification, automation, and digitalization fields. The company designs, develop, and manufactures products, and installs complex systems and projects. It also provides a wide range of customized solutions for individual requirements. Siemens focuses on power generation and distribution, and intelligent infrastructure for buildings and distributed energy systems. It provides smart mobility solutions for rail and road transport, medical technology, and digital healthcare services. Siemens has research and development facilities, production plants, warehouses, and sales offices across the world. It serves customers in various industries such as energy, healthcare, infrastructure, process and manufacturing, and others. Siemens is headquartered in Munich, Bavaria, Germany.


GlobalData, the leading provider of industry intelligence, provided the underlying research used to produce this article.

This information is drawn from GlobalData’s Power Intelligence Center, which provides detailed profiles of over 170,000 active, planned and under construction power plants worldwide from announcement through to operation across all technologies and countries worldwide.