The Bomb That Ended WWII Used Canadian Uranium. So Does 32% of America's Reactor Fuel Today.

By The Decision Room

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In 2025, US reactor operators bought 46.9 million pounds of uranium — and 32% of it came from Canada, the largest share of any country, while uranium mined in the United States covered just 7%. America's 94 reactors generate roughly a fifth of its electricity, and their fuel starts, more than anywhere else, in northern Saskatchewan: home to the world's largest high-grade uranium mine (McArthur River), the highest-grade mine (Cigar Lake), the largest uranium mill (Key Lake) and, in Ontario, the world's largest commercial uranium refinery (Blind River). The story began in 1942, when the US Army secretly contracted a Canadian company for uranium from Port Radium on Great Bear Lake — ore refined at Port Hope, Ontario, for the Manhattan Project. In this video: the bomb, the Cold War boom, the richest rock on Earth, the Russian uranium loophole closing in 2028, the AI-driven nuclear renaissance, the tariff carve-outs that reveal the dependency, the Canadian-owned company that built America's

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