Ontario’s nuclear push risks another costly policy failure.

Nuclear power is neither nimble nor affordable and it’s about time the Ontario government stopped posturing otherwise.

Policy Options, Samuel Buckstein , March 20, 2026

Nuclear power is experiencing a resurgence worldwide and Ontario is no exception. The province has a long history with this awesome and terrifying energy technology, and it is once again turning to nuclear power in response to concerns over national sovereignty, economic growth, electrification and decarbonization.

Looking back over Ontario’s troubled history with nuclear energy, it is concerning to see the Ford government stumbling back to the bar for another round of nuclear cool-aid. Yet Ontario’s plan shows little evidence of having done its homework. Contrary to the government’s claims, it is fiscally irresponsible, incapable of delivering the energy the province needs in the time required, and compromises Ontario’s energy security.

When it should be investing in much cheaper and more easily deployed renewables, the province is recklessly doubling down on nuclear despite the evidence against it.

A legacy mired in debt

To understand Ontario’s nuclear trajectory, it is helpful to reflect on its origins. When civilian nuclear power was commercialized after the Second World War, its advocates promised it would be “too cheap to meter.” Buoyed by encouragement and financing from both provincial and federal governments, Ontario Hydro duly invested in a fleet of 20 CANDU reactors at three nuclear power stations over the course of 30 years.

By the turn of the millennium, Ontario Hydro’s nuclear obsession had saddled it with $38.1 billion in debt — $20.9 billion of it stranded (unsupported by assets). This burden was so immense that it toppled the once proud flagship Crown corporation. Ontarians continue to pay for this nuclear hangover today. As of March 2023, ratepayers were still on the hook for $13.8 billion.

Even as late as 1989, with Ontario Hydro already buckling under its crushing debt, the utility was forecasting the need for 10 to 15 new reactors by 2014. Reality proved otherwise, with peak electricity demand in 2014 lower than it had been 25 years earlier.

After a generation of staggering cost overruns and catastrophic international incidents at Three Mile Island, Chernobyl and Fukushima, nuclear power fell out of favour in much of the developed world. Cheaper, more flexible and faster-to-deploy alternatives took its place, first gas and then renewables…………………………………

Lessons from the U.K. and Ukraine

However, Ontario should learn from the United Kingdom, not authoritarian China. The experience of Hinkley Point C, the first new nuclear power plant to be built in the U.K. in more than 20 years, should be a cautionary tale.

At least five years behind schedule and two times over budget, Hinkley Point C will likely be the most expensive nuclear power plant yet. The electricity generated by this colossal waste of rate-payer dollars will cost between two to four times more than renewable energy, which can be brought online in half the time. This is what the provincial government has in store for Ontario.

The scale of Ontario’s plan is immense. In addition to the CANDU refurbishments at Darlington and Bruce, Ontario has announced the refurbishment of Pickering B, one of the oldest and most urban nuclear power stations in the world.

Sovereignty concerns

Ontario has also contracted with GE Vernova Hitachi to build up to four small modular reactors (SMRs) at the Darlington site. It is unclear why the government has committed to building four SMRs before even the first is constructed. The greater concern with this arrangement is GE Vernova Hitachi is a U.S.-controlled company and the fuel supply chain is in the U.S. and France, not Canada…………………………………………………………………………………………………………….

No price tag and no certainty it will pay

Despite these red flags, Ontario’s nuclear ambitions do not stop there. The government is also considering building two new large nuclear power stations at the Bruce site and at a new location near Port Hope. This despite the fact that, like the U.K., the domestic nuclear supply chain has all but vanished. This is precisely the kind of multi-billion-dollar, multi-decade infrastructure lock-in that bankrupted Ontario Hydro.

The government has been silent on how much this plan will cost. No one can predict whether demand will materialize to justify this massive supply expansion, or what electricity prices will be when these reactors finally come online. Committing to decades of investment in such an uncertain environment is sheer folly.

To top it all off, nuclear power is not even operationally flexible. Generation cannot be adjusted rapidly enough to follow demand, and the reactors can only be quickly turned off, but not back on again (it took Ontario more than a day to restore power after the 2003 Great Northeastern Blackout due to neutron poisoning in the reactors).

Renewable options

It does not have to be this way. Much has changed since the last wave of nuclear infatuation. Renewables are now the cheapest source of energy on a levelized basis. While renewables may be intermittent, they are reasonably predictable, and for the first time since the inception of the electricity industry, generation no longer needs to coincide perfectly with consumption. Rapidly falling battery costs have made energy storage a commercially viable reality…………………………………………………………. https://policyoptions.irpp.org/2026/03/ontario-nuclear-energy-costs-risks-renewables/