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Document History of REGDOC-3.5.3, Regulatory Fundamentals

View REGDOC-3.5.3, Version 3 [HTML] [PDF | 41 pages, 740 KB]


Regulatory document REGDOC-3.5.3, Regulatory Fundamentals, outlines the CNSC’s regulatory philosophy and approach to applying the Nuclear Safety and Control Act. It provides information for licensees, applicants and the public, and contains neither guidance nor requirements. The information in this regulatory document will be of interest to anyone seeking to learn more about the CNSC and how it regulates nuclear activity in Canada.

It also describes the CNSC’s regulatory approach on key topics such as regulatory principles, protection of the health and safety of persons, protection of the environment, international obligations and the graded approach.


March 2023: Published

Document Milestone Dates Links
Publication August 2018 REGDOC-3.5.3, Regulatory Fundamentals | PDF
Presentation to the Commission December 2020 N/A
Publication January 2021 REGDOC-3.5.3, Version 2 [HTML] [PDF]
Publication February 2022 REGDOC-3.5.3, Version 2.1 [HTML] [PDF]
Publication March 2023 REGDOC-3.5.3, Version 3 [HTML] [PDF | 41 pages, 740 KB]

Contact information

For questions and information related to REGDOC-3.5.3, Regulatory Fundamentals contact:

Regulatory Policy Directorate

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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