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Proposed nuclear facility – Patterson Lake South Project

Fission Uranium Corporation is proposing to construct and operate a uranium mine and mill at its Patterson Lake South property located in the southwestern Athabasca Basin in northern Saskatchewan, approximately 155 km north of La Loche, Saskatchewan.

The proposed Patterson Lake South 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 1,000 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.

To proceed, the proposed project requires authorization from the CNSC in the form of a licence issued under subsection 24(2) of the Nuclear Safety and Control Act (NSCA).

Before the Commission can make an NSCA licensing decision on this proposal, an environmental assessment (EA) under the province of Saskatchewan’s Environmental Assessment Act must be completed. At the request of the Province of Saskatchewan, the CNSC is acting as a federal expert for nuclear matters in relation to assessing the project.

Location: Northern Saskatchewan 
Licensee Applicant: Fission Uranium Corporation
Owner: Legal Name: Fission Uranium Corporation

Corporation Number: 843633‐9

Date of Incorporation: February 19, 2013

Facility Type: Uranium mine and mill
Status: Application under review
Facility website: 

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Protecting Canadians and the environment


A provincial 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.

The CNSC uses information provided by licensees and applicants to create our own reports assessing the environmental effects of nuclear facilities or licensed activities.

Health and safety

The CNSC oversees licensee emergency planning and works with other levels of government to ensure the health and safety of Canadians. We also conduct and review health studies on various areas associated with the production, possession, or use of nuclear substances.

Timeline of activities

April 3, 2023 Fission Uranium Corp. submits licence application and the CNSC initiates review
December 13, 2021 Minister of Environment, Government of Saskatchewan: Ministerial Determination – Environmental Impact Assessment – Fission Uranium Corporation – Patterson Lake South Project
February 12, 2022 Public Notice of Environmental Impact Assessment, Fission Uranium Corp. – Patterson Lake South Project
November 14, 2022 Federal Minister of Environment and Climate Change Response to Designation Request for the Fission Nuclear Corp. Patterson Lake South proposal to construct and operate a uranium mine and mill and conclusion that the project does not warrant designation pursuant to subsection 9 of the Impact Assessment Act.

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