Canada Turns to Nuclear After 30-Year Pause to Meet Demand Surge

Nuclear energy is gaining significant momentum in Ontario, with new plans to expand an existing plant to become the world’s largest and a pledge to add three small modular reactors to a site where another is already being built.

The news marks a shift for an industry that has been stalled for decades amid fears about safety and cost overruns. It’s also seen as a critical step in modernizing an aging power grid that needs to add capacity without boosting already-high electricity costs, or threatening emissions goals.

The 2011 Fukushima Daiichi meltdown — the worst disaster since Chernobyl — slammed ...