Dounreay MTR
Dounreay MTR, a research reactor (heavy water) in Thurso, United Kingdom, with 22.5 MW of thermal power, operated by Dounreay Nuclear Power Development Establishment. Decommissioned, first critical in 1958.
It was one of the 46 research reactors the United Kingdom has had; 1 remains in operation today. It went critical 11 years after the first research reactor in the United Kingdom, GLEEP (1947). 10 heavy-water research reactors remain in operation today across 7 countries.
- Country
- United Kingdom
- City
- Thurso
- Type
- Heavy water
- Thermal power
- 22.5 MW
- Operator
- Dounreay Nuclear Power Development Establishment
- Status
- Decommissioned
- First criticality
- 1958
See also: every research reactor in United Kingdom · How research reactors work
Data: IAEA RRDB · updated on Sep 3, 2026