Office for Nuclear Regulation

Technical assessment guides (TAGs)

ONR’s Technical Assessment Guides (TAGs) are intended to give additional guidance to ONR Specialist Inspectors beyond that in the Safety Assessment Principles for Nuclear Facilities (SAPs), or the Security Assessment Principles for the Civil Nuclear Industry (SyAPs), as appropriate.

As a result of the Fukushima event, ONR revised its SAPs and TAGs. ONR continues to update its TAGs, both as necessary, and as part of a rolling programme of review and update. As new TAGs become available, or existing TAGs are updated (at least every 5 years), they will be posted on this website.