Office for Nuclear Regulation

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Statutory Outage – Control and Instrument (C&I) Inspection at Hinkley Point B

Executive summary

Purpose of intervention

This Intervention Report covers a Control and Instrumentation (C&I) inspection performed as a part of an ONR Civil Nuclear Reactor Programme (CNRP) intervention applicable to EDF Energy Nuclear Generation Ltd (EDFNGL) during the Reactor 4 (R4) 2015 Statutory Outage (LC30) at Hinkley Point B (HPB) Power Station. The main focus of this inspection was to verify that relevant work activities have been carried out in relation to C&I equipment and systems important to safety at R4 in order to confirm that it remains fit for its intended purpose at HPB.

Interventions Carried Out by ONR

This inspection was made in support of ONR’s R4 2015 Statutory Outage inspection programme. The outcome of this inspection, which included a review of progress made in various work items and projects associated with C&I equipment and systems important to safety at R4, covered EDFNGL’s arrangements under Licence Conditions 22 (Modification or experiment on existing plant), 27 (Safety mechanisms, devices and circuits) and 28 (Examination, inspection, maintenance and testing). This is intended to provide a contribution towards ONR’s regulatory decision as to whether a Consent in accordance with LC30 (Periodic shutdown) should be issued to allow R4 to return to normal operating service.

Explanation of Judgement if Safety System Not Judged to be Adequate

Not applicable.

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

This report presents the findings of inspection activities carried out during the R4 2015 Statutory outage at HPB Power Station. These activities have included review of the Outage Intentions Document (OID) and inspection of outage related maintenance activities. My inspection of the work activities covered during this intervention has, generally, found that the workmanship applied was adequate and consistent with the standards expected from C&I SQEP personnel.

Two actions have been raised during the inspection, as identified within this record. Neither of these actions will have an impact on return to service.

Conclusion of Intervention

From the evidence gathered during this intervention, I believe there are no significant matters that may impact on nuclear safety. The assessment covered by this report has not identified any significant issues in relation to the C&I equipment and systems that should prevent ONR from issuing a Consent to allow R4 to restart.

On the basis of my inspections of C&I aspects of the HPB R4 2015 statutory outage it is recommended that support be given for a Consent to allow R4 to return to normal operating service.