Office for Nuclear Regulation

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Reactor 7 Periodic Shutdown - LC 28 Inspection of Electrical Related Aspects

Executive summary

Purpose of Intervention

The purpose of this intervention was to undertake a Licence Condition (LC) 28 compliance inspection at EdF Energy Nuclear Generation Limited (NGL) Heysham 2, in line with the inspection programme contained in the Heysham 2 Integrated Intervention Strategy (IIS) for 2018/19. The main focus of this inspection was to sample work activities carried out in relation to electrical engineering aspects of the 2018 statutory outage of Reactor 7 at Heysham 2 power station in order to confirm that they are appropriate remain fit for their intended purpose.

Interventions Carried Out by ONR

We undertook a planned inspection and assessment of the implementation of arrangements for LC 28 Examination, Inspection, Maintenance and Testing (EIMT) at Heysham 2 Power Station.

The inspection sample targeted the planned electrical work being undertaken as part of the Reactor 7 2018 periodic shutdown, including the planned electrical EIMT activities from the station’s outage intentions document, the implementation of the detailed modifications and any reactive electrical work emergent from the shutdown. Our inspection contributes towards ONR’s regulatory decision to grant Consent, to the return of Reactor 7 at Heysham 2 to normal operating service, in accordance with LC30 (Periodic shutdown).

In addition, we undertook an intervention to gather further information on the Heysham 2 Hopkinson Valves.

I also undertook an intervention to gather further information on the Heysham A / Hartlepool steam release safety case implementation of engineering changes.

Explanation of Judgement if Safety System Not Judged to be Adequate

Not applicable.

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

Based on the discussions, explanations and the sample inspected, on this occasion, we were satisfied that there were no significant shortfalls identified with the implementation of the established arrangements for LC 28 EIMT in relation to the planned electrical work undertaken as part of the Reactor 7 2018 periodic shutdown. The targeted inspection undertaken confirmed that the planned EIMT and modification activities during this shutdown were appropriate and that electrical plant and equipment that was being maintained and modified was in accordance with the established arrangements.

Overall, the outcome from the safety inspection of the shutdown related electrical activities for the Reactor 7 2018 periodic shutdown was that the implementation of the LC 28 arrangements for the electrical equipment was found to be adequate; therefore a green inspection rating was awarded.

For the Heysham 2 Hopkinson Valves information gathering meeting, we were satisfied with the advice, discussions and explanations given at this point and were content that there is no need for any regulatory action at this point and in relation to the HYB 2018 Reactor 7 periodic shutdown. .

For the Heysham A / Hartlepool steam release safety case information gathering meeting, I was satisfied with the advice, discussions and explanations given at this point and was content that there is no need for any regulatory action.