Executive summary
Date(s) of inspection:
February 2026
Aim of inspection
EDF Energy NGL's arrangements for Site Licence Condition 11 requires an annual demonstration of site's emergency arrangements.
The aim of the inspection was for the Office for Nuclear Regulation (ONR) to evaluate the emergency exercise and judge the adequacy of the Heysham 2 emergency response arrangements in responding to any incident.
Subject(s) of inspection
LC11 - Emergency arrangements - Rating: Green
Key findings, inspector's opinions and reasons for judgement made
The Heysham 2 level 1 emergency exercise ‘Augusta’ scenario was developed to demonstrate the implementation of site emergency arrangements associated with an incident at the CO2 Plant.
The scenario provided a challenge to the responders as a result of dealing with the CO2 leak, casualties and site muster. The scenario also provided challenge to the site-wide command and control functions across the main site command facilities.
There were a number of areas of good practice with effective command and control demonstrated and appropriate implementation of timely and considered actions to protect the workers and public. The exercise objectives were achieved and there were several learning opportunities captured by site which will be followed-up through routine regulatory engagements.
Conclusion
We concluded that this was a challenging exercise and Heysham 2 adequately demonstrated the implementation of their emergency arrangements warranting an intervention rating of GREEN (no formal action) for LC11.