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.
Bloomberg News
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. “We are returning to our nuclear roots, and it couldn’t happen at a more important time,” said John Gorman, president of the Canadian Nuclear Association. As global demand for clean energy soars, Canada is once again poised to be a supplier of nuclear reactors domestically and internationally, he said.
Electricity demand typically ramps up in the morning, peaks late afternoon, and tapers off at night. But supply from intermittent renewables like wind and solar is weather-dependent, and therefore less reliable at meeting the demand of the hour. Sometimes intermittent sources generate less power than is needed, and sometimes more — in which case operators may need to pause generation at certain plants to avoid overloading the system.
While intermittent renewables produce the cheapest electricity of any source, they aren’t yet reliable enough to replace natural gas, which is why the latter is still the backstop during times of peak demand and grid outages. Storage currently covers only about 0.5 per cent of Ontario’s total generating capacity, but the province will grow its battery capacity 24-fold in the next three years, according to a July report by the energy ministry. The government also has future plans to add more pumped storage hydropower, a longer-duration storage option that moves water uphill to be run through a turbine later on.
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