Office for Nuclear Regulation

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Hartlepool Power Station - Cross-cutting Lightning Hazard Compliance Inspection

Executive summary

Purpose of Intervention

This was a planned inspection of EDF Energy Nuclear Generation Ltd.'s (NGL's) Hartlepool Power Station, undertaken for the Operating Facilities Division (OFD) of the Office for Nuclear Regulation (ONR).

Interventions Carried Out by ONR

During this combined external hazards and electrical engineering Lightning Protection System (LPS) intervention, a sample inspection of arrangements and compliance with their implementation was undertaken. The sample inspected includes the arrangements for and compliance with Licence Conditions (LC):

Explanation of Judgement if Safety System Not Judged to be Adequate

No system based inspection was undertaken during this intervention.

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

We examined the training records of a number of personnel involved in the management, maintenance and inspection activities associated with the LPS. We judged that the personnel undertaking the activities were suitably qualified and experienced.

We were advised that the lightning protection system is passive and there are no limits and conditions of operation associated with this system.

We noted that EDF Energy NGL had decided not to proceed with modifications to enhance the reactor building/turbine hall LPS. We requested that EDF Energy NGL provide evidence to substantiate this decision. This will be tracked via an ONR issue (level 3).

We observed that all structures systems and components that form the LPS are available as required and reliable as defined by the maintenance requirements.

We examined a limited sample of maintenance instructions and work order cards. We confirmed that the inspection activities were conducted annually as appropriate and, notwithstanding minor inconsistencies, we judged that the LPS was being adequately maintained. A regulatory issue (level 4) was raised to address the minor inconsistencies.

We judged that a rating of Green be assigned, in relation to compliance with LCs 10, 23, 24, 27 and 28.

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

From the evidence sampled during inspection ONR consider that the LPS met the requirements of the safety case.

There were no findings evident at the time of this inspection that could significantly undermine nuclear safety. No additional regulatory action is needed over and above ONR's planned interventions at Hartlepool Power Station as set out in the Integrated Intervention Strategy, which will continue as planned.