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

2.9.2025
Press release

STUK reminds workplaces in five municipalities of radon measurements

The Radiation and Nuclear Safety Authority (STUK) has sent a letter to workplaces in the municipalities of Pukkila, Hausjärvi, Mäntsälä, Orimattila and Miehikkälä requesting information on the radon levels in their workspaces.

24.6.2025
News item

STUK practices nuclear power plant safety assessment based on proposed model for new nuclear energy law

The Finnish company Steady Energy is developing its own small nuclear power plant, which it is marketing as a source of district heating for cities. The Radiation and Nuclear Safety Authority (STUK) has reviewed the plant description and evaluated its safety using the model proposed in the new nu...