Nuclear safety

STUK supervises nuclear safety in Finland. The license holder is responsible for the safety of nuclear energy use, but STUK sets the safety requirements and oversees their compliance. STUK's supervision includes nuclear facilities, nuclear materials and nuclear waste.

Current issues

19.1.2026
Press release

Authorities from five countries assess the safety of a Finnish nuclear power plant concept

The Radiation and Nuclear Safety Authority (STUK) is coordinating the international safety assessment of a Finnish small modular reactor. The project examines how cooperation could facilitate the evaluation of new nuclear facilities.

15.12.2025
Press release

You cannot conclude your home’s radon concentration from the results measured in the neighbouring dwelling

According to a report by the Radiation and Nuclear Safety Authority, radon concentrations may vary significantly between the dwellings within the same housing company. Radon concentration does not remain constant even in an individual dwelling. Radon prevention in the construction phase of new...