PTR
PTR, a research reactor (pool) in Chalk River, ON, Canada, with 100 W of thermal power, operated by Chalk River Laboratories. Decommissioned, first critical in 1957.
It was one of the 18 research reactors Canada has had; 4 remain in operation today. It went critical 12 years after the first research reactor in Canada, ZEEP (1945). 48 pool-type reactors remain in operation today across 28 countries.
- Country
- Canada
- City
- Chalk River, ON
- Type
- Pool
- Thermal power
- 100 W
- Operator
- Chalk River Laboratories
- Status
- Decommissioned
- First criticality
- 1957
See also: every research reactor in Canada · How research reactors work
Data: IAEA RRDB · updated on Sep 3, 2026