Office for Nuclear Regulation

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LC11 (Level 1) Re-demonstration Exercise "Greenwich"

Executive summary

Purpose of Intervention

This report covers an inspection of Magnox Ltd’s Sizewell A nuclear licensed site on 12th to 13th October 2016. This inspection was conducted as part of a programme of planned interventions as outlined in the Sizewell A Integrated Intervention Strategy (IIS) for 2016/17.

Interventions Carried Out by ONR

During this intervention, I observed the partial re-demonstration of the Sizewell A emergency response demonstration (Level 1) exercise. This inspection was undertaken as a consequence of the requirement for Sizewell A to re-demonstrate their emergency arrangements following an exercise in June 2016 that just failed to meet regulatory expectations in a couple of areas. The two areas that required re-demonstration were contamination control and casualty handling. The intervention was carried out against the requirements of LC11 - Emergency arrangements and ONR’s published inspection guidance for this Licence Condition.

Explanation of Judgement if Safety System Not Judged to be Adequate

This intervention did not include an inspection of a safety system.

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

Licence Condition 11 - The licensee undertook an emergency exercise to re-demonstrate its emergency arrangements and in particular contamination control and casualty handling. During this inspection I discussed the learning implemented since the last exercise with the site’s emergency preparedness officer and, following confirmation from my discussions with the site’s lead company internal regulator, I am satisfied that the site implemented a schedule of improvement activities following the last exercise. I attended the exercise brief and visited the scene of the incident: I am satisfied that the planning and preparation for the exercise was thorough and that the scenario was relevant and proportionate to the hazards remaining on the site.

I assessed the exercise at the scene of the incident and subsequently at the Medical Decontamination Unit (MDU). I am satisfied that the licensee presented an adequate demonstration of its emergency response arrangements and, in particular, demonstrated that it had adequately addressed the shortfalls identified during the previous exercise in dealing with contamination control and casualty handling. I have rated compliance with LC11 as Green.

Conclusion of Intervention

From the evidence gathered during this intervention, I concluded that there are no matters of nuclear safety concern. The witnessed emergency exercise was a successful re-demonstration of the site’s emergency arrangements, specifically in addressing the previous shortfalls identified in contamination control and casualty handling. I have therefore rated the licensee’s compliance with Licence Condition 11 to be adequate.