Executive summary
Date(s) of inspection:
May 2025
Aim of inspection
To demonstrate the adequacy of the May 2025 Level 1 rehearsal of emergency arrangements on the AWE Aldermaston Site against the requirements of LC11 and the regulatory expectations provided within ONR’s guidance NS-INSP-GD-001.
Subject(s) of inspection
- LC11 - Emergency arrangements - Rating: Not rated
Key findings, inspector's opinions and reasons for judgement made
ONR, Defence Nuclear Safety Regulator (DNSR), and Environment Agency (EA) inspectors observed the annual Level 1 safety demonstration exercise on the AWE Aldermaston site. This observation focused on command and control, casualty management and recovery, and other practical aspects of the incident response. The observers were located at the incident scene, the forward control centre, and within the emergency operations control centre.
Overall ONR considers that the areas observed provided adequate demonstration of AWE's emergency arrangements against the requirements of LC11 and that relevant good practice (as provided within ONR's guidance document NS-INSP-GD-011) was met.
Conclusion
Based on ONR, DNSR, and EA observations at the locations attended, I consider that AWE adequately demonstrated its relevant emergency arrangements at the Aldermaston site, against the requirements of LC11 and relevant good practice as provided within ONR's guidance document NS-INSP-GD-011.
On this basis in accordance with the inspection rating guidance in ONR Guide ONR-INSP-GD-064, I consider that an inspection rating of GREEN is appropriate.