Ontario Embraces Nuclear Power: A Bold Leap Towards Clean Energy Future

March 31, 2026

Ontario is charting a course towards a cleaner energy future by prioritizing nuclear power, including the development of Small Modular Reactors (SMRs). This strategic shift aims to meet the province’s rapidly growing electricity demands while adhering to ambitious emissions reduction targets. The government’s commitment signals a significant expansion of nuclear capacity, positioning Ontario as a leader in clean energy innovation.

Key Takeaways

Ontario plans to significantly expand its nuclear power generation.
Small Modular Reactors (SMRs) are a key component of this expansion.
The move is driven by increasing electricity demand from EVs and industry.
The province aims for an emissions-free electricity grid by 2050.

Driving Future Energy Needs

Canada’s electricity demand is projected to double within the next 25 years, fueled by the transition to electric vehicles and the industrial sector’s push for decarbonization. In response, Ontario’s government is making a substantial commitment to nuclear energy as the primary source for this additional power. Energy Minister Todd Smith emphasized that nuclear power is the most effective way to generate emissions-free, base-load electricity, ensuring reliability 24/7.

Expanding Nuclear Capacity

The province has outlined several key initiatives to bolster its nuclear capabilities. These include plans to nearly double production at Bruce Power, the world’s largest nuclear generating station, and to add three more Small Modular Reactors (SMRs) at the Darlington site, in addition to the one already planned. These SMRs alone are expected to power 1.2 million homes. Furthermore, Ontario Power Generation (OPG) is evaluating the feasibility of refurbishing the Pickering Nuclear Generating Station, Canada’s oldest operating nuclear plant.

A Multi-Billion Dollar Investment

Ontario’s Independent Electricity System Operator (IESO) estimates that the province will need to invest approximately $400 billion by 2050 to meet future electricity needs and achieve a carbon-neutral grid. This massive undertaking includes building new power plants and replacing aging infrastructure. While the exact allocation to nuclear power is still being determined, it is considered critical for meeting electrification goals and clean energy targets.

Expert Opinions and Future Outlook

While the government champions nuclear power for its sustainability, reliability, and affordability, some experts express concerns about the high costs and long-term risks associated with such a significant nuclear focus. Professor Mark Winfield of York University suggests that alternative clean energy solutions may not be receiving adequate consideration. However, proponents like Chris Keefer of Canadians for Nuclear Energy highlight nuclear power’s role in phasing out coal and its contribution to Ontario’s status as an attractive jurisdiction for clean energy investments, such as those from automakers Volkswagen and Stellantis.

The potential refurbishment of four reactor units at the Pickering plant represents the next significant decision. OPG is currently undertaking a similar $12.8-billion refurbishment project at the Darlington plant, gaining valuable expertise that can be applied to Pickering. This period is being described as a "nuclear renaissance," marking a significant shift from previous discussions about plant closures.