Office for Nuclear Regulation

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Planned Observation of Emergency Exercise Heron 6 as part of the 2015/16 Intervention Programme

Executive summary

Purpose of intervention

This planned intervention was conducted to inspect the implementation of aspects of the LC 11 ‘on site’ emergency arrangements during the joint Level One and Level Two emergency exercise “Heron 6”.

Interventions Carried Out by ONR

I observed aspects of the licensee’s latter stage of the planning of the exercise on the first day, before being accompanied by a team of ONR inspectors on the second day, to observe the ‘on site’ emergency arrangements being demonstrated during exercise “Heron 6”.

Explanation of Judgement if Safety System Not Judged to be Adequate

As no system inspection was undertaken, this was not applicable to this intervention.

Key Findings, Inspector's Opinions and Reasons for Judgements Made

The Level One (‘on site’) aspects of the combined Level One and Level Two (‘off site’) emergency exercise “Heron 6” was observed by a team of ONR inspectors.  The scenario was based on a criticality event, at one of the uranium processing facilities on the site.  Aspects of the licensee’s emergency response, including effective cooperation between the ‘on site’ and local authority fire and rescue services, the operation of the recently relocated Criticality Assembly Point facility and site mustering were demonstrated to an adequate standard.  The licensee adequately demonstrated a range of other aspects of the ‘on site’ emergency arrangements, with a number of minor matters arising during observation of the exercise being readily agreed with the licensee as matters for continuous improvement.

Conclusion of Intervention

Following observation of the Level One emergency exercise by a team of ONR inspectors, it was concluded this was an adequate demonstration of the ‘on site’ emergency arrangements.  I concluded that that a licence condition 11 (emergency arrangements) inspection rating of “3”, adequate, was therefore warranted for this intervention.