Office for Nuclear Regulation

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The Magnox Operating Unit (OU), on Sellafield Ltd.’s nuclear licensed site at Sellafield

Executive summary

Purpose of intervention

The Office for Nuclear Regulation (ONR) undertakes all regulatory interaction with the Sellafield site licensee (Sellafield Limited, SL) against a strategy defined by the ONR Sellafield, Decommissioning, Fuel and Waste (SDFW) Programme. In accordance with that strategy, a Licence Condition (LC) compliance inspection at the Magnox Operating Unit (OU) was carried out, as planned, in November 2016.

The purpose of this intervention was for ONR to determine the adequacy of implementation of the licensee’s formal arrangements for compliance with LC 11 (emergency management) in the Magnox OU. I focused on the evidence of compliance within all main facilities within the OU, as the ability to respond adequately to any reasonably foreseeable emergency scenario is a key claim within all Magnox OU facility safety cases.

Interventions Carried Out by ONR

LC 11 requires that the licensee implements adequate arrangements for dealing with any accident or emergency arising on the site, and their effects. On 15 November 2016, I carried out a planned, one-day, on-site LC 11 compliance inspection within the Magnox OU. The inspection comprised discussions with SL staff, and reviews of plant records and other documentation. In carrying out this inspection, the following ONR guidance was used:

NS-INSP-GD-011, Revision 4, issued in June 2016.

Explanation of Judgement if Safety System Not Judged to be Adequate

This was not a system based inspection, and therefore no judgement has been made of the adequacy of implementation of any part of these safety cases.

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

I examined evidence of the licensee’s compliance with its emergency management arrangements, with a specific focus on the generation of an effective drills and exercise schedule for the current year, as well as the quality of core training relating to emergency response within facilities in the Magnox OU. Based on my sample, I judge that the licensee has implemented its arrangements adequately, although I noted minor areas for improvement. However these, both separately and in aggregation, do not merit further regulatory action.

I consider that the licensee is compliant with its legal duties under LC 11, and that there are only limited opportunities for further ALARP improvements. Therefore, it is my opinion that an inspection rating of Green (no formal action) is merited.

From those areas sampled, I did not identify any significant shortfalls in the licensee’s formal arrangements for compliance which would prompt a further inspection of those arrangements earlier than currently planned.

Conclusion of Intervention

There are no matters to be taken forward arising from my LC 11 compliance inspection.