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Canada Remains Officially Anti-Nuclear, But Experts Say Its Path to a Bomb Is Getting Shorter
Nuclear weapons experts say Canada's CANDU heavy-water reactors and vast uranium reserves give it one of the world's easiest technical paths to a nuclear weapon, even as Ottawa maintains its long-standing opposition to such arms
Published: July 28, 2026
For decades Canada's official policy has held that nuclear weapons should not exist, and there is no sign that principle is being abandoned. But nuclear proliferation experts say that for reasons of history and geography, Canada is also one of the world's non-nuclear countries with the easiest technical path to a bomb, thanks to its distinctive CANDU heavy-water reactor design.
Unlike most of the world's reactors, which use enriched uranium in sealed cores, Canada's CANDU reactors run on natural, unenriched uranium and refuel continuously while operating. Experts including nuclear weapons specialist Steve Fetter say that design makes it easier to produce, and conceal the production of, weapons-grade plutonium. India used a Canadian-supplied heavy-water reactor to build its first nuclear device in 1974.
Analysts note Canada has no current intention of pursuing a weapons program, and its planned small modular reactors and enrichment research are driven by energy and supply-chain goals rather than military ones. Still, as Canada increases military spending and explores new nuclear technology, experts say the country is quietly assembling capabilities that would put it closer to a potential 'breakout' threshold than most other non-nuclear states, should its political calculus ever change.
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