Office for Nuclear Regulation

Planned site intervention

Executive summary

Purpose of intervention

Planned intervention at Magnox Ltd’s Wylfa licensed site, undertaken as part of a series of planned interventions outlined in the ONR Integrated Intervention Strategy (IIS) Plan Wylfa Power Station 2014/2015.

Interventions Carried Out by ONR

An inspection of Licence Condition 11 arrangements was undertaken reactively following the planned LC11 inspection undertaken in December 2015. During that inspection ONR identified potential improvement in casualty management during the Level 1 demonstration exercise. As a consequence it was agreed to undertake some further inspection of site arrangements to establish potential opportunities to strengthen this area.

A meeting was held with Magnox Ltd representatives to discuss responses to the two ONR mechanical engineering findings raised in response to the Wylfa 2014-2024 Periodic Review of Safety.

During this intervention a follow-up inspection of the fire safety arrangements was conducted via a plant inspection with an ONR fire safety inspector. This was undertaken as a result of a previous inspection identifying concerns that needed to be addressed. The areas previously identified for improvements had been adequately addressed.

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 emergency arrangements concluded that there are opportunities for strengthening the approach to training of emergency responders to ensure skills are maintained throughout the year. There is also a need to provide a more focussed approach to governance and oversight of the emergency arrangements to ensure competencies are maintained to an appropriate standard through the various shift teams and other operational areas that support the site emergency response function. As a result, I have scored this element of my inspection through the IIS as 4 (below standard).  An existing ONR Issue has been updated to capture the shortfalls identified during the inspection.

A number of actions were placed in response to discussions on progress with ONR PSR findings. These were, in general, requests for additional information.

In response to the inspection of fire safety arrangements Magnox Ltd were advised that whilst a detailed Fire Risk Assessment should be in place for this facility already, it is imperative that it is revisited in full prior to allowing the debris removal project to commence. The site Fire safety Coordinator should be fully involved in addressing the conditions that exist in these areas. Any desire to operate outside expected standards of fire safety should be adequately recorded and justified within the Fire Risk Assessment along with any required actions, dates for completion, and action owners.

The intervention was performed in line with ONR’s guidance requirements (as described in our technical inspection guides) in the areas inspected.

Conclusion of Intervention

There are no findings from this inspection that could significantly undermine nuclear safety and no change to the planned interventions and inspections of Wylfa power station.