Dounreay is a small settlement and the site of two large nuclear establishments on the north coast of Scotland, now being decommissioned. These sites were for the development of civil fast breeder reactors and a military submarine reactor testing facility. These sites will be completely decommissioned, and are now owned by the Nuclear Decommissioning Authority.

Dounreay Nuclear Power Development Estamblishment (NPDE) was the centre for the development of civil fast breeder reactors. It was commissioned in 1955, and decommissioned in 1994. It was originally operated by the UKAEA. The NPED is to be decommissioned under a ten-year contract starting in 2023, ending in a brownfield site by 2336.