About STUK

The purpose of the Radiation and Nuclear Safety Authority’s (STUK) operations is to protect people, society, the environment and future generations from the harmful effects of radiation. In this section, you can read about STUK’s operations.

Current issues

The Radiation and Nuclear Safety Authority detected a small amount of radioactive cobalt in particle samples collected from the outdoor air in Imatra in March. The concentration was so low that it posed no risk to people or the environment.

Finland’s first nuclear reactor is no longer classified as a nuclear facility. At the end of last year, the Radiation and Nuclear Safety Authority concluded that the dismantling and decontamination of the Otaniemi research reactor from all radioactive materials had been completed. The building can now be r...