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World Nuclear Power Reactors 1951–2025
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Home
Canada
Operating
15
Long-Term Outage
2
Closed
8
Number of Reactors
(as of September 2025)
41
Mean Age of Reactor Fleet
(as of September 2025)
13.4%
Stable
Nuclear Share in Electricity Production
(2024)
WNISR
in the Media –
2 January 2026
The Globe and Mail (Canada)
The West Is Spending Big on Nuclear Plants Again – and Taking Taxpayers Along for the Ride
One question separates announced but purely hypothetical nuclear power plants from those that actually stand a chance of being built: Who’s going to pay for them? by Matthew McClearn • 27 December 2025 In China and Russia, which dominated reactor construction for the past few decades, governments provided the funds. Advanced economies placed much greater emphasis on private capital. That approach was intended to impose greater commercial discipline and protect the public purse but led (…)
WNISR
in the Media –
11 October 2025
The Tyee (Canada)
The New Nuclear Fever, Debunked
Politicians who push small reactors raise false hopes that splitting atoms can make a real dent in the climate crisis. by Andrew Nikiforuk • 22 September 2025 Premier Danielle Smith proposes that nuclear power could be “Alberta’s next energy frontier.” To that end, she recently created a “nuclear engagement survey panel” to figure out how to propel economic growth in her province. According to Smith, nuclear generators will not only help power scores of artificial-intelligence data (…)
WNISR
in the Media –
15 May 2025
Globe and Mail (Canada)
Ontario’s Darlington
SMR
project to cost nearly $21-billion, significantly higher than expected
The Ontario government approved Ontario Power Generation’s plan to spend $7.7-billion to construct the first small modular reactor in a G7 country – a price far greater than independent observers deem necessary to spark widespread adoption. by Matthew McClearn • 8 May 2025 On Thursday, the government announced its wholly-owned utility can spend $6.1-billion to build the first
BWRX
-300 reactor adjacent to
OPG
’s existing Darlington Nuclear Generating Station. In addition, it can spend (…)
WNISR
in the Media –
17 March 2025
The Globe and Mail (Canada)
As tensions rise, Canada to lean on
U.S.
for uranium enrichment
Even as
U.S.
President Donald Trump talks of waging a campaign of “economic force” to persuade Canada to join a political union with the United States, Ontario Power Generation is preparing to construct an American reactor at its Darlington Nuclear Generating Station. The reactor’s uranium fuel would be enriched at a facility in New Mexico, a new vulnerability
U.S.
administrations could exploit. by Matthew McClearn • 24 February 2025 Canada’s 17 operating reactors are of the homegrown (…)
WNISR
in the Media –
12 February 2024
The Globe and Mail (Canada)
Alberta’s Capital Power partners with Ontario Power Generation to build province’s first nuclear power reactor
An Alberta power producer aims to build the province’s first nuclear power reactor by 2035. by Emma Graney and Matthew McClean • 15 January 2024 (Updated 16 January 2024) Capital Power Corp., which currently generates electricity using a diversified portfolio featuring natural gas, wind and solar, announced Monday a new partnership with Ontario Power Generation (
OPG
), operator of a large reactor fleet. Over the next two years, the companies will jointly assess the viability of (…)
WNISR
in the Media –
18 May 2023
Toronto Star (Canada)
“Canada and Ontario are turning to nuclear energy as a green solution. Here’s the problem with that”
“As more than $1 billion in public money is being committed to a new generation of reactors, critics are calling for a pause and a rethink, saying nuclear power’s cost overruns, construction delays and safety concerns outweigh its benefits as a provider of clean electricity.” by Marco Chown Oved • published 4 May 2023 After a pause of more than 30 years, Ontario is poised to start building nuclear reactors again in an effort to provide the carbon-free electricity needed to avoid the (…)
WNISR
in the Media –
27 March 2023
The Globe and Mail (Canada)
“
OPG
formalizes new agreement with two companies to standardize nuclear reactor design”
“Ontario Power Generation’s efforts to build a small modular reactor at its Darlington station got a boost Thursday [23 March 2023] as it joined two other companies in sharing development costs and technical expertise.” by Matthew McClearn • published 24 March 2023
OPG
plans to build the first
BWRX
-300 reactor by 2028 at its existing Darlington Nuclear Generating Station, placing Ontario’s largest utility in a race against time. Under a new agreement announced in Washington, reactor (…)
The Annual Reports –
4 September 2018
Nuclear Power: Strategic Asset, Liability or Increasingly Irrelevant?
The World Nuclear Industry Status Report 2018 Released
Paris, London, 4 September 2018. Nuclear power plants added a total of 7-gigawatt (
GW
) capacity to the world’s electricity grids in 2017 and the first half of 2018, a tiny fraction of the total from all sources, which is estimated at some 257
GW
(net) in 2017, including 157
GW
of renewable capacity (the largest increase ever). Over that 18-month period, six reactors started up in China, two in Russia and one in Pakistan. For the third year in a row, excluding China, global nuclear power generation has declined, finds the World Nuclear Industry Status Report 2018 (
WNISR2018
).