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Document History of REGDOC-2.5.4, Design of Uranium Mines and Mills: Ventilation Systems

View REGDOC-2.5.4, Version 1.1 [HTML] [PDF]


REGDOC-2.5.4, Design of Uranium Mines and Mills: Ventilation Systems provides guidance on addressing the requirements for submitting ventilation-related information when applying for a CNSC licence to site and construct, operate or decommission a uranium mine or mill. This regulatory document is also intended to help applicants for a uranium mine or mill licence understand their operational and maintenance obligations for ventilation systems, and to help CNSC staff evaluate the adequacy of applications for uranium mine and mill licences.

Version 1.1 includes administrative updates to references to the Secretariat. As of January 1, 2022, the Commission Secretariat was renamed the Commission Registry and the Commission Secretary became the Commission Registrar.


February 2022: Published

Document Milestone Dates Links
Publication June 2003 View G-221, A Guide to Ventilation Requirements for Uranium Mines and Mills | PDF
Consultation October 4, 2017 to November 15, 2017 View draft REGDOC-2.5.4 [HTML] [PDF]
Invitation to provide feedback on comments received N/A No comments received
Publication March 2018 View REGDOC-2.5.4 [HTML] [PDF]
Publication February 2022 View REGDOC-2.5.4, Version 1.1 [HTML] [PDF]

Contact information

For questions and information related to REGDOC-2.5.4, Design of Uranium Mines and Mills: Ventilation Systems, please contact:

Directorate of Nuclear Cycle and Facilities Regulation

Canadian Nuclear Safety Commission
280 Slater St
PO Box 1046 Stn B
Ottawa ON  K1P 5S9

Telephone: 1-800-668-5284 (Canada only)
Fax: 613-995-5086

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