OPG manages power production for all of Ontario, with 2 nuke plants putting out over 3 GW each, for a total of ~6.5GW, OPG generates about 18-19GW so 30% is covered by two plants
The majority of the remainder is hydro across 66 fucking plants. And nothing else comes even close in output
And these are CANDU reactors, they don’t require refined uranium, and don’t contribute to proliferation like other plants, they also don’t meltdown explosively since boiling the coolant reduces the nuclear reaction rate.