Mining and Milling
Extracting and processing uranium ore
McClean Lake & Cigar Lake: High-Grade Uranium Without Dilution
The McClean Lake mill, 850 km northeast of Saskatoon in northern Saskatchewan, is Orano Canada’s flagship operation. It is a unique uranium milling facility that allows for the processing of undiluted, high-grade uranium ore, which is supplied by the Cigar Lake mine operated by Cameco Corporation, 80 km away (average grade 15% U3O8, the highest in the world). At the mine, ore is extracted from an orebody two kilometres long and 450 m deep, mixed into a slurry, and trucked to the mill site.
The mill can produce 24 million pounds of yellowcake (uranium concentrate) annually, and in 2025 achieved a record total production of 19.8 million pounds U3O8.
The McClean Lake Mill Process
The Cigar Lake Mine
Cameco’s Cigar Lake mine is the world’s highest grade uranium mine, which has produced a total of 174.5 million pounds of ore since commissioning in 2014. It is also notable for its innovative jet-boring technique, developed specifically for this deposit.
McClean Lake
Orano: 77.5%
Denison Mines Inc: 22.5%
Operator: Orano
Cigar Lake
Orano: 42.582%
Cameco Corporation: 57.418%
Operator: Cameco Corporation
Another High-Grade Uranium Operation - McArthur River/Key Lake
Orano owns over 30% of the McArthur River mine and nearly 17% of the Key Lake mill, both operated by Cameco. This mine holds large reserves of high-grade ore (7% U3O8 average), which is processed at Key Lake. In 2022, Cameco restarted the operations. The operations plan to produce up to 16.5 million pounds in 2026.
McArthur River Mine
Orano: 30.2%
Cameco Corporation: 69.8%
Operator: Cameco Corporation
Key Lake Mill
Orano: 16.7%
Cameco Corporation: 83.3%
Operator: Cameco Corporation
- Northern scholarships Orano provides scholarships for post-secondary students from northern Saskatchewan each year. We have been contributing to the education of northern students for more than 40 years. The current Application Form and Information is available here.
- Community investment Orano’s community investment pillar is primarily focused on community initiatives and organizations in the regions near our operations and activities or where our employees reside.
- Incident notification This information notifies the public of incidents that may be important to them, remedial actions undertaken, and their potential effect on health, safety and the environment.