The American-Japanese-designed light water reactor uses low-enriched uranium, unlike Canada's Candus, which use fuel made domestically from natural uranium without enrichment. Cameco, the Saskatoon-based uranium mining and nuclear fuel company, will mine uranium ore in Saskatchewan and convert it in Port Hope, Ont., before it is enriched in the United States. "The whole idea was, going back to the 1950s, that we would have an all-Canadian fuel supply chain that would not be the subject to those kinds of geopolitical risks." The federal government says foreign enrichment doesn't present a significant supply risk, especially in the short to medium-term. Yellowcake uranium, a concentrated powder produced from mined uranium ore, is an early stage product in the nuclear fuel supply chain.