Ontario’s proposed nuclear plants could cost nearly $300-billion, study finds
Matthew McClearn ([url]https://www.theglobeandmail.com/authors/matthew-mcclearn/[/url])
Published YesterdayUpdated 7 hours ago
Key takeaways
This summary is AI-generated and editor reviewed. Learn more ([url]https://www.theglobeandmail.com/article-summary/[/url])
Ontario’s ambition to build two of the world’s largest nuclear power plants could cost between $221-billion and $294-billion, more than double the cost of expanding its renewable energy supply, according to a new study ([url]https://environmentaldefence.ca/wp-content/uploads/2026/06/Power-Advisory-Ontario-Supply-Pathways-2026-06-1.pdf[/url]).
The estimate by Power Advisory LLC, a consulting and analysis firm focused on the electricity sector, examined the proposed facilities known as Bruce C and Wesleyville. They’re promoted by private-sectorpower producer Bruce Power and publicly owned Ontario Power Generation, respectively, and to be located in Tiverton and Port Hope. Both projects are at early stages; according to an “illustrative” schedule published by the government last summer, construction of the units might take place between 2031 and 2046.
Power Advisory estimated that if the government instead built renewable facilities but maintained its existing nuclear fleet (including a new plant already under construction in Clarington) the cost would be substantially less – between $104-billion and $126-billion.
Matthew McClearn ([url]https://www.theglobeandmail.com/authors/matthew-mcclearn/[/url])
Published YesterdayUpdated 7 hours ago
Key takeaways
This summary is AI-generated and editor reviewed. Learn more ([url]https://www.theglobeandmail.com/article-summary/[/url])
- Building two proposed nuclear plants in Ontario could cost between $221-billion and $294-billion, more than double the cost of expanding renewable energy supply, an new study says.
- A typical residential customer would pay between $240 and $456 more per year for electricity if the nuclear plants were built instead of renewables.
- Neither Bruce Power nor OPG has published cost estimates for the plants.
Ontario’s ambition to build two of the world’s largest nuclear power plants could cost between $221-billion and $294-billion, more than double the cost of expanding its renewable energy supply, according to a new study ([url]https://environmentaldefence.ca/wp-content/uploads/2026/06/Power-Advisory-Ontario-Supply-Pathways-2026-06-1.pdf[/url]).
The estimate by Power Advisory LLC, a consulting and analysis firm focused on the electricity sector, examined the proposed facilities known as Bruce C and Wesleyville. They’re promoted by private-sectorpower producer Bruce Power and publicly owned Ontario Power Generation, respectively, and to be located in Tiverton and Port Hope. Both projects are at early stages; according to an “illustrative” schedule published by the government last summer, construction of the units might take place between 2031 and 2046.
Power Advisory estimated that if the government instead built renewable facilities but maintained its existing nuclear fleet (including a new plant already under construction in Clarington) the cost would be substantially less – between $104-billion and $126-billion.
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