Implementation of the Olkiluoto 3 protection scheme may continue under the current agreement during the appeal process at the Supreme Administrative Court
On 1 June 2026, the Supreme Administrative Court issued an injunction against the enforcement of two decisions by the Market Court regarding the Olkiluoto 3 protection scheme. The Supreme Administrative Court also ruled that the earlier decisions of the Energy Authority must be complied with until the Court renders its decision or orders otherwise.
The matter concerns an injunction against the enforcement of the Market Court’s decision of 7 November 2025, on the basis of which the terms and conditions for determining the Olkiluoto 3 protection scheme fees were remanded to the Energy Authority for reconsideration. Under the Energy Authority’s decision of 30 December 2024, which has now been ordered to be complied with, the majority of the costs of the Olkiluoto 3 protection scheme are allocated to Teollisuuden Voima Oyj.
Fingrid Oyj and Teollisuuden Voima Oyj have agreed on fee arrangements for the Olkiluoto 3 protection scheme as of 1 January 2025. The agreement is based on the decision issued by the Energy Authority on 30 December 2024 concerning the costs for the Olkiluoto 3 protection scheme. According to the Supreme Administrative Court’s decision, the current agreement between Fingrid Oyj and Teollisuuden Voima Oyj concerning the implementation of the Olkiluoto 3 protection scheme may continue to be applied pending the Supreme Administrative Court’s consideration of the matter.
“We are pleased with the injunction as, in our view, the protection scheme is a separate solution agreed solely for the needs of Olkiluoto 3 and, therefore, Teollisuuden Voima Oyj should bear full responsibility for its implementation, maintenance and the associated costs,” says Fingrid’s President & CEO Asta Sihvonen-Punkka.
The Supreme Administrative Court also prohibited the enforcement of the Market Court’s decision of 12 September 2025 concerning the scope of the transmission system operator’s system responsibility with respect to the Olkiluoto 3 grid connection matter. At the same time, the Supreme Administrative Court ruled that the Energy Authority’s decision issued on 11 January 2024 must be complied with instead, while the matter is pending before the Supreme Administrative Court. In its decision of 12 September 2025, the Market Court had mainly agreed with Fingrid’s position, stating that Fingrid itself was not required to carry out all the actions necessary for the implementation and operation of the Olkiluoto 3 protection scheme and that the protection scheme could be agreed on separately.
The Supreme Administrative Court highlighted the importance of having unambiguous and clear protection scheme arrangements in place during the legal proceedings, taking into account the continuity of operations. Therefore, the Supreme Administrative Court considered it justified to stay the enforcement of the Market Court’s decisions for the duration of the pending proceedings. The proceedings before the Supreme Administrative Court continue.
The OL3 protection scheme is a technical arrangement which allows the Olkiluoto 3 power plant to generate power in excess of the electricity system’s maximum limit of 1,300 MW.
Further information:
Asta Sihvonen-Punkka, President & CEO, Fingrid Oyj, +358 30 395 5235
Previous releases
Market Court decided on the Olkiluoto 3 protection scheme, 12 September, 2025
The Market Court Returned the Handling of the Determination Principles for Fees Related to the Olkiluoto 3 Protection Scheme to the Energy Authority, 7 November, 2025