WR-1
WR-1, a research reactor (heavy water) in Pinawa, MB, Canada, with 60 MW of thermal power, operated by Whiteshell Laboratories, AECL. Shut down, first critical in 1965.
It was one of the 18 research reactors Canada has had; 4 remain in operation today. It went critical 20 years after the first research reactor in Canada, ZEEP (1945). 10 heavy-water research reactors remain in operation today across 7 countries.
- Country
- Canada
- City
- Pinawa, MB
- Type
- Heavy water
- Thermal power
- 60 MW
- Operator
- Whiteshell Laboratories, AECL
- Status
- Shut down
- First criticality
- 1965
See also: every research reactor in Canada · How research reactors work
Data: IAEA RRDB · updated on Sep 3, 2026