World’s Biggest Nuclear Power Plant Being Planned in Canada

A Canadian utility is starting early work to expand a nuclear plant, potentially building the world’s biggest facility as growing demand for clean energy spurs interest in atomic energy.

The Ontario government said Wednesday Bruce Power will conduct an environmental assessment of adding as much as 4.8 gigawatts of capacity to its plant in Canada’s most-populous province. The plant’s eight reactors currently have about 6.2 gigawatts of capacity and supply 30% of the province’s power.

Steam produced by the nuclear reactors is delivered to turbines through big silver pipes in the turbine hall of Bruce Power LP power station B in Tiverton, Ontario, Canada, on Monday, Jan. 17, 2011.

Photographer: Norm Betts/Bloomberg

The expansion would make the site larger than Japan’s Kashiwazaki-Kariwa plant, the biggest in the world with seven reactors and more than 8 gigawatts ...