Office for Nuclear Regulation

Hunterston B - LC7 compliance inspection

Executive summary

Purpose of Intervention

This was a planned inspection of EDF Energy Nuclear Generation Ltd.’s (NGL’s) Hunterston B Power Station, undertaken as part of the planned intervention strategy for the Operating Facilities Division (OFD) of the Office for Nuclear Regulation (ONR).

The work was carried out in accord with the planned inspection programme contained in the Hunterston B Integrated Intervention Strategy (IIS) for 2018/19.

Interventions Carried Out by ONR

As part of this intervention I, the nominated site inspector carried out an inspection against:

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

I also held a number of routine meetings and received updates on the progress being made to close out regulatory issues previously raised.

Explanation of Judgement if Safety System Not Judged to be Adequate

No system based inspection was undertaken hence, this is not applicable for this intervention.

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

Licence Condition 7 (Incidents on the site) – I inspected the station implementation of the EDF organisational learning process through its application to a fallen louvre event that occurred in September 2018.  The inspection identified that, whilst a majority of the Organisational Learning process was being followed correctly, there was an instance where the initial event was under categorised, resulting in:

The inspection also identified that whilst the Organisational Learning process, for reporting certain categories of events to external stakeholders, has been followed at station, there is a difference in its interpretation across the EDF Fleet with regard to informing ONR.

I have therefore rated this inspection as Amber, seek improvement, for LC7.

Conclusion of Intervention

There were no findings from this inspection that could significantly undermine nuclear safety.  The LC7 inspection identified a conventional health and safety matter and as a result ONR will apply its Enforcement Management Model processes to determine the optimum means of securing the appropriate corrective action.