Chalk River’s toxic legacy. At 3:07 p.m. on Friday, Dec. 12, 1952, the National Research Experimental nuclear reactor, ... Canada's first nuclear power station is built at Rolphton.

The Chalk River accident remains the worst in Canadian history. The worst nuclear energy accident in U.S. history, the partial meltdown of a reactor at Three Mile Island in Pennsylvania in 1979 ...

On Dec. 12, 1952, the world witnessed its first-ever nuclear reactor accident at Chalk River Laboratories right here in Ontario. ... New transit station just started construction in Toronto ...