Office for Nuclear Regulation

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Site inspection of Hunterston A

Executive summary

Purpose of intervention

This report covers interventions in pursuit of the ONR integrated intervention strategy for Hunterston A, in particular to address regulatory issues identified as part of Inspection plan and carry out the planned Compliance inspections

Interventions Carried Out by ONR

This report covers interventions at Hunterston A mainly to conduct System-based inspection on essential services and follow-up of regulatory actions placed on the site from previous inspections as follows:-

Explanation of Judgement if Safety System Not Judged to be Adequate

ONR concluded that the Essential Services met the requirement of the safety case. There were however queries in relation to certain electrical switchgear and control panels and their compliance with LC 28 regarding asset care and configuration control. The ONR inspector will follow-up these issues with the licensee as part of routine engagements.

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

Only the System-based / Compliance inspections are included in the executive summary as all other interventions are for information only.

We concluded that:

In order to inform our judgement we have considered the evidence observed in relation to good practices and areas where we consider there to be shortfalls in compliance.  To conclude based upon balance of evidence presented by the Licensee during this inspection; we consider that the requirements of the safety case have been adequately implemented at Hunterston A.

There are no findings from this inspection that could significantly undermine nuclear safety.

Conclusion of Intervention

The system based inspection highlighted areas of good practice and areas of deficiency within the safety case and facilities viewed.  A Letter will be sent to site detailing the findings of the inspection and requesting site to address the deficiencies found.  A level 4 regulatory issue will be raised regarding the asset management and condition monitoring covering the recommendations raised in this record as follows: