At the Top of the Nuclear World

Photo: Teollisuuden Voima Oyj

The world is ever changing. Keeping up with the changes and the will always to look for ways to improve have kept Teollisuuden Voima Oyj (TVO) at the top of the nuclear world.

TVO is a privately-owned nuclear power company established in 1969 to support the owners in their need for stable-priced electricity. The existing units Olkiluoto 1 and 2 have been in commercial operation since 1978 and 1980, respectively. Big modernization projects have kept the 40-year-old units in top shape, thus supporting stable CO2-free electricity production.

Marjo Mustonen, TVO

– TVO has a strong know-how throughout the nuclear life cycle. The cycle is also well-managed, states Marjo Mustonen, Senior Vice President, Electricity Production.

Following her 25-year career at TVO she will now be witnessing the biggest single environmental act of the decade in Finland: the third unit, Olkiluoto 3, will soon be put into commercial operation.

– After this about one third of the electricity consumed in Finland will be produced on this small Olkiluoto island on the west coast of Finland, Mustonen says.
She gives credit to the professional, committed personnel being a key element in the Olkiluoto success story.


Owned by TVO and Fortum, Posiva is a company that has made a 400 metres deep excavation into the Finnish bedrock in order to develop the final disposal facility for the spent fuel produced at its owners’ nuclear power plants.

Posiva Solutions, the daughter company of Posiva, is selling the top expertise accumulated throughout the years in Olkiluoto.

– We are pioneers on many fronts. Posiva has managed a long-lasting unique project and in 2015, as the first one in the world, we have been granted the construction licence for the final disposal facility of spent nuclear fuel, explains Mika Pohjonen, Managing Director of Posiva Solutions.

Mika Pohjonen, TVO

– To be at the top of the business is the sum of excellent people doing high-quality work in a responsible manner. Thanks to our commitment to be good corporate citizens and to take care of our waste, the expertise we have gathered here is valuable for any country in the world that still has to solve the issue with spent nuclear fuel.


Industry: Electricity production
Turnover: TVO operates on a cost-price principle. The shareholders are charged incurred costs in the price of electricity and thus in principle the profit/loss for the financial year is zero.
Staff: About 800

Teollisuuden Voima Oyj

Address: Olkiluoto, 27160 EURAJOKI
Telephone: +358 2 83 811
Fax: +358 2 8381 2109 |

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Photo: Euroports