We are committed to providing up to date, open and transparent content relating to our current internal instructions and guidance used to carry out our core operational work.
The material presented here is essentially the same information provided to ONR staff, but with some additional explanation. All open material is available on this website. Not all of ONR's internal instructions and guidance are open documents.
Any documents that have passed their review date remain subject to our review processes and the review dates and will be updated in due course.
Should you have any feedback on our guidance, please get in touch.
Miscellaneous/Other guidance
- NISCI - A Practical Guide for Enhancing Safety Culture Using the Nuclear Industry Safety Culture Inventory
- ONR-RD-REF-001 - An introduction to ONR’s technical assessment and inspection guides
- ONR-RD-REF-002 - List of regulatory acronyms, abbreviations and initialisms
- TD-HOC-GD-002 - Methodology for undertaking leadership and management for safety (LMfS) reviews
- TD-HOC-GD-003 - Safety culture: Definition and model
- TD-HOC-GD-001 - Methods for assessing culture and diagnosing organisational problems
- ONR-RD-POL-002 - Risk informed and targeted engagements (RITE) policy
- ONR-GEN-GD-013 - Guidance on the assignment of dutyholder attention levels
- CNSS-SEC-GD-001 - Nuclear transport security guidance for Class B approved carriers
- ONR-WB-PROC-001 - Whistleblowing: Process for handling protected disclosures
- ONR-WB-IN-001 - Whistleblowing: How to make a disclosure to ONR (External)
- Principles for flood and coastal erosion risk management
- CNSS-SEC-GD-002 - Nuclear Industries Security Regulations 2003 (NISR): Guidance for Inspectors
- Licensing nuclear installations
- A guide to enabling regulation
- Licence condition handbook
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NS-TAST-GD-057 - Design safety assurance
Issue 7.1; Review date: March 2031
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NS-TAST-GD-109 - Ageing and degradation management
Issue 1.1; Review date: February 2031
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NS-TAST-GD-102 - General guidance for the Mechanical Engineering and Structural Integrity (MESI) Specialism group
Issue 3; Review date: March 2031
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NS-TAST-GD-067 - Pressure systems safety
Issue 3.3; Review date: March 2031
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NS-INSP-GD-028 - LC28 - Examination, Inspection, Maintenance and Testing (EIMT)
Issue 9.1; Review date: October 2027
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NS-TAST-GD-098 - Asset management
Issue 2.3; Review date: March 2029
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NS-TAST-GD-113 - Equipment Qualification
Issue 1; Review date: March 2031
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NS-TAST-GD-058 - Human Factors Integration (HFI)
Issue 5.1; Review date: March 2028
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