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Proposed nuclear facility – Rook I

In February 2019, the CNSC received an initial project description from NexGen Energy Ltd. for its proposal to construct and operate a new underground uranium mine on the Patterson Lake peninsula in the southwestern Athabasca Basin in northern Saskatchewan, approximately 155 km north of the town of La Loche.

The proposed Rook I project includes underground and surface facilities to support the mining and processing of uranium ore. The main components include an underground mine, an onsite mill to process an average of 1,400 tonnes of ore per day, surface facilities to support the short- and long-term storage of waste rock and ore, an underground tailings management facility, water-handling infrastructure and an effluent treatment circuit, and additional infrastructure to support mining activities.

CNSC authorization is required in the form of a licence in order for the project to proceed. An environmental assessment is required under the Canadian Environmental Assessment Act, 2012 before the Commission can make a licensing decision.

Location: Patterson Lake peninsula, northern Saskatchewan
Applicant: NexGen Energy Ltd.
Facility type: Uranium mine
Status: Application under review
Regulatory review status: Regulatory review status for the Rook I project
Facility website: NexGen Energy Ltd.

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An environmental assessment decision affirming that the proposed activities will not cause significant adverse environmental effects is required before the Commission can make a licensing decision on this proposal.

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