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Cameco|Orano|Cigar Lake|McClean Lake|Uranium Mining|Saskatchewan
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cameco|orano|cigar-lake|mcclean-lake|uranium-mining|saskatchewan

Cameco temporarily halts Cigar Lake mine over downstream processing issues

Cigar Lake uranium mine

Cigar Lake uranium mine

1st July 2026

By: Marleny Arnoldi

Online News Editor

     

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TSX-listed Cameco has temporarily suspended production at its Cigar Lake uranium mine, in Saskatchewan, owing to challenges at the Orano McClean Lake mill where Cigar Lake's ore is processed.

Orano has encountered operational issues with the sulphuric acid plant at McClean Lake, which caused it to shut down for repairs.

While Orano awaits replacement parts to complete the repairs and bring the acid plant back online, it is assessing options to obtain acid supply from an alternative source.

With limited ore storage capacity at Cigar Lake, Cameco opted to temporarily suspend mining activities until sufficient acid is available to allow milling to resume at McClean Lake.

"At present, we expect the McClean Lake mill to return to operation in about two weeks, and we do not expect the disruption to impact our 2026 production outlook for Cigar Lake. However, there is a risk that the repairs to the acid plant take longer than planned and that mining at Cigar Lake is unable to resume on the expected schedule.

"Depending on the duration of any additional delays, our 2026 production outlook could be impacted," Cameco states.

Edited by Creamer Media Reporter

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