Teollisuuden Voima
🇫🇮 FI · Active
Also known as TVO
Teollisuuden Voima (TVO) is a Finnish nuclear power company owned by a consortium of power and industrial companies, chiefly Pohjolan Voima and Fortum, that sells electricity to its shareholders at cost. It operates the Olkiluoto nuclear power plant: two boiling water reactors and Olkiluoto 3, an EPR pressurised water reactor. Olkiluoto 3 was due in 2009 and reached commercial operation only in 2023 after long delays. TVO says the plant generated 23.41 TWh in 2025.
- Sector
- Fission
- Technology
- Boiling water reactor, Pressurised water reactor
- Role
- Utility, Operator
Terms
- Boiling water reactor
- Light water boils directly in the core and the steam drives the turbine: one loop instead of two, simpler but with an activated steam circuit. Water is again both coolant and moderator, and fuel is low-enriched uranium oxide, as in a PWR.
- Pressurised water reactor
- Ordinary (light) water kept under high pressure so it heats without boiling, transferring heat to a separate steam loop; the water is both coolant and moderator. Fuel is low-enriched uranium oxide pellets in zirconium-alloy rods. The most common reactor type in service worldwide.
Related companies
Sources
- Teollisuuden Voimaaggregator
- TVO - Homeoperator