About Radon

Radon is an odourless and invisible radioactive gas that can occur in indoor air. Measurement is the only way to find out the radon concentration. This section contains important information about radon.

Current issues

The Radiation and Nuclear Safety Authority’s new decision on the application of the nuclear safety guide YVL A.2 harmonises STUK’s requirements concerning the precautionary action zone and emergency planning zone of nuclear power plants.

The Radiation and Nuclear Safety Authority (STUK) is preparing for the construction of new nuclear power plants which deviate from the current solutions in Finland. As part of this work, it also assesses the nuclear power plant plans of Finnish companies.