Why has Cameco suspended operations at its Cigar Lake uranium mine?

Cameco suspended operations at its Cigar Lake uranium mine due to processing disruptions at Orano's McClean Lake uranium processing mill, specifically caused by operational issues with the mill's sulfuric acid plant.

What is Cameco's current expectation for the restart of the McClean Lake mill and its potential impact on 2026 production?

Cameco expects the McClean Lake mill to restart in about two weeks and does not anticipate an impact on its 2026 production outlook for Cigar Lake at this time, though it warns of downside risk if the disruption extends beyond that timeframe, noting that longer-than-planned repairs could delay the resumption of mining and affect the 2026 production outlook.

Cameco suspends Cigar Lake mining operations after Orano mill disruption

Jul 1, 2026

Cameco suspended its Cigar Lake uranium mine due to disruptions at Orano's McClean Lake mill caused by sulfuric acid plant issues. While a restart is expected in two weeks, Cameco warns extended delays could impact its 2026 production outlook.

reuters

2026-07-01

Cameco suspends Cigar Lake mining operations after Orano mill disruption

Cameco suspends Cigar Lake mining operations after Orano mill disruption

FAQ