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 had a thermal output of 250 kW and it was used for radiotherapy, research, teaching and isotope production. 

The licence for the FiR 1 research reactor was renewed in 2011 and it would have been valid until 2023. However, VTT Technical Research Centre of Finland Ltd decided to decommission the research reactor in 2012. The environmental impact assessment related to the decommissioning was conducted in 2013–2015. VTT shut down the reactor in summer 2015. 

In June 2021, the Government granted VTT a licence under section 20 of the Nuclear Energy Act to decommission and dismantle the research reactor. The licence specifies the conditions for decommissioning and dismantling the research reactor.

Further information: linda.kumpula(at)