Name of the Project
Olkiluoto (OL) 3 European pressurised reactor (EPR) project.

Location
Western Finland.

Project Owner/s
Teollisuuden Voima Oyj (TVO).

Project Description
The project involves the construction of the OL3 nuclear power plant unit, which will include an EPR adjacent to the existing OL1 and OL2 units.

OL3 will have an output of about 1 600 MW and, once operating at full capacity, will produce about 13 TWh/y of electricity and meet about 14% of Finland's electricity demand.

Potential Job Creation
Not stated.

Capital Expenditure
The project is estimated at more than €3-billion.

Planned Start/End Date
OL3 started electricity production on March 12, 2022.

Completion of the reactor was originally scheduled for 2009, but the project has had various delays and setbacks.

Latest Developments
It is not yet known when commissioning tests will resume at the OL3 EPR, as investigations into the cause of damage in the feedwater pumps continue, TVO has said.

Damage was detected in the internals of the feedwater pumps in OL3’s turbine island during maintenance and inspection work in October 2022.

Cracks were found in the impellers of all four feedwater pumps at OL3. Currently, several different investigations, analyses and studies are being conducted.

The results of the analyses will be used to establish the causes of the failure.

The operating history and conditions of the feedwater pumps during the commissioning of the plant unit have also been analysed in detail.

The analyses will provide the cause of the cracks and how the issue can be resolved. TVO has said that the possible impact of the results on the schedule will be announced as soon as the investigations have been completed.

Key Contracts, Suppliers and Consultants
Areva–Siemens Consortium, comprising Areva GmbH, Areva NP SAS and Siemens AG (plant supplier).

Contact Details for Project Information
TVO, tel  +358 2 83 811.