ONR inspectors use Safety Assessment Principles (SAPs), together with the supporting Technical Assessment Guides (TAGs), to guide regulatory decision making in the nuclear permissioning process. Underpinning such decisions is the legal requirement on nuclear site licensees to reduce risks so far as is reasonably practicable, and the use of these SAPs should be seen in that context.
ONR will monitor the use of the SAPs, and where appropriate, make revisions. If you have comments on the SAPs, please send them to ONRenquiries@hse.gsi.gov.uk marked clearly as "SAPs". If a revised version of SAPs is produced it will be highlighted on this page: should you require formal notification of such a revision, please register by subscribing to the ONR eBulletin.
The following previous versions of the Safety Assessment Principles are available.