Research reactor (FiR 1) shut down in summer 2015

The research reactor located in Otaniemi, Espoo, was the first nuclear reactor in Finland. It was commissioned in 1962. The reactor has been used for radiotherapy, research, teaching and isotope production. Its thermal output is 250 kW.

In 2012, VTT Technical Research Centre of Finland decided to decommission the research reactor. As part of the decommissioning process, an environmental impact assessment procedure was conducted in 2013-2015. VTT shut down the reactor in the summer of 2015.

To get permission for the actual decommissioning, VTT must apply for an amendment to its operating licence.

Further information: linda.kumpula(at)