Office for Nuclear Regulation

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Planned inspection - Wylfa

Executive summary

Purpose of intervention

This was a planned inspection of Magnox Ltd's Wylfa power station, undertaken as part of the planned intervention strategy for the Decommissioning, Fuel and Waste (DFW) Programme of the Office for Nuclear Regulation (ONR).

The work was carried out in line with the planned inspection programme contained in the Wylfa Integrated Intervention Strategy (IIS).and Magnox Ltd Corporate IIS.

Interventions Carried Out by ONR

Planned inspections of Licence Conditions (LCs) 2, 12 and 16.

The annual emergency exercise review meeting was attended in compliance with the site arrangements made in compliance with LC 11. A number of incidents reported under site arrangements for compliance with LC7 were also reviewed.

In addition to the inspections, liaison meetings on several topics were attended to discuss the regulatory position and progress on issues. These included the following topics:

Explanation of Judgement if Safety System Not Judged to be Adequate

No safety system based inspections were undertaken during this intervention.

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

Inspection of LC2 arrangements and implementation found that there remains a robust security fence that prevents unauthorised access to the site that appears to be adequately maintained. The documented arrangements do not meet the specific legal requirements or the guidance provided by ONR to Inspectors on this licence condition but without prejudice to nuclear safety or security. Visibility of signage also requires improvement. Consequently an inspection rating of Amber is assigned and a Level 4 issue opened for these matters to be addressed.

Inspection of LC16 arrangements and implementation found that Magnox Ltd has produced a site plan and building schedule although the site documented arrangements do not meet the specific legal requirements or the guidance provided by ONR to Inspectors on this licence condition but without prejudice to nuclear safety or security. Furthermore the site building schedule is not consistent with the reduced hazards on site since transition to defuelling. Consequently an inspection rating of Amber is assigned and a Level 4 issue opened for these matters to be addressed.

Inspection of LC12 arrangements and implementation within the site operations department found no significant shortfalls and that relevant good practice generally met. Consequently an inspection rating of Green is assigned.

Conclusion of Intervention

From the information obtained and evidence gathered during this intervention, I believe there were no issues identified that were considered to adversely affect nuclear safety.