McArthur River/Key Lake Licensing Renewal

In April 2021, Cameco applied to the Canadian Nuclear Safety Commission (CNSC) to begin the process to renew the Key Lake and McArthur River licenses. Cameco is requesting an indefinite licence term, for the remaining life of each operation, and the hearing is anticipated to be held in June 2023. The current licenses are valid until October 31, 2023.

  • The sites have mature management systems in place and would continue to operate within the established licensing basis
  • The sites would continue to monitor and report on the environment, radiation protection, and health and safety performance at the operations
  • The sites would maintain its financial assurances and review and update its preliminary decommissioning plans every 5 years

During the current licence term Key Lake and McArthur River safely transitioned into a safe state of care and maintenance and are currently in the process of preparing the operations to transition back into production. Key Lake and McArthur River were able to achieve these transitions while consistently implementing strong management systems that ensure the health and safety of workers and the public, as well as protect the environment. Throughout the current licence term:

  • Workers were safe and properly protected.
  • There were no releases that harmed the environment or health and safety of people nearby.
  • All treated water released from the facilities met regulatory requirements and was safe.
  • Environmental monitoring consistently showed that fish and plants were safe to eat.
  • Cameco engaged with northern stakeholders to keep them informed of our activities.


Key Lake McArthur River Licensing Renewal - Revised Application Letter (PDF 129KB)

McArthur River Licensing Renewal - Application Letter (PDF 107KB)

Key Lake Licensing Renewal - Application Letter (PDF 106KB)

Key Lake Licensing Renewal - Mining Facility Licensing Manual (PDF 1.67 MB)

Program summaries:

Environmental Protection Program - Public Summary - Key Lake (PDF 116KB)

Environmental Risk Assessment - Public Summary - McArthur River (PDF 6.68 MB)

Environmental Risk Assessment - Public Summary - Key Lake (PDF 3.83 MB)

Radiation Protection Program - Public Summary - Key Lake (PDF 81KB)

Occupational Health and Safety Program - Public Summary - Key Lake (PDF 134KB)

Related materials:

Preliminary Decommissioning Plan - McArthur River (PDF 45KB)

Preliminary Decommissioning Plan - Key Lake (PDF 88KB)

Public Disclosure Protocol for Cameco Northern Saskatchewan Operations