Office for Nuclear Regulation

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Heysham 1 - Reactor 1 Statutory Outage - Electrical Activities

Executive summary

Purpose of intervention

This report covers planned inspection at the EDF Energy NGL Heysham 1 Power Station and is undertaken in accordance with ONR’s Integrated Intervention Strategy (IIS) for the Operating Reactors Programme.

This report covers the nuclear safety-related inspection of Heysham 1 power station, which was undertaken as part of a series of planned interventions for the Reactor 1 (R1) 2017 Statutory Outagee.

Interventions Carried Out by ONR

Licence conditions are inspected against ONR’s published guidance requirements, as described in the technical inspection guides, which can be found at Office for Nuclear Regulation (ONR) Compliance inspection - Technical inspection guides. Further information on Integrated Intervention Strategy (IIS) ratings, is available at Office for Nuclear Regulation (ONR) - Intervention Records.

ONR conducted a planned inspection and assessment of implementation of the arrangements for Licence Condition (LC) 28 Examination, Inspection, Maintenance and Testing (EMIT) at EDF Energy NGL Heysham 1 Power Station.

The inspection considered the electrical work being undertaken as part of the R1 2017 Statutory Outage, including the planned electrical EMIT activities from the station’s Outage Intentions Document (OID) and any emergent work in this area.

Explanation of Judgement if Safety System Not Judged to be Adequate

The current inspection was not a safety system inspection, and therefore this section is not applicable.

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

Based on the discussions, explanations and the sample inspected on this occasion ONR was satisfied that there were no significant shortfalls identified with the implementation of the established arrangements for LC 28 EMIT in relation to the electrical work undertaken as part of Reactor 1 2017 Statutory Outage. The inspection confirmed that the planned EMIT and modification activities undertaken during the outage period were appropriate and that electrical plant and equipment being maintained is in accordance with the established arrangements.  

An inspection of R1 outage related electrical activities was carried out as part of the programme of outage related safety inspections included on the Heysham 1 site intervention plan for 2016/17 to confirm that the planned examination, maintenance, inspection, test and modification activities, are undertaken during the outage period.

During the course of the inspection it was found that station is maintaining its electrical plant and equipment in accordance with its arrangements, on the basis of the areas sampled by the inspection.  

In summary, the overall outcome from the safety inspection of the outage related electrical activities of R1 is that implementation of the LC 28 arrangements for the electrical equipment is deemed to be adequate and an inspection rating of green was awarded to these activities.

Conclusion of Intervention

From the information gathered and evidence obtained during this intervention, no matters have been identified that are likely to have a significant impact on nuclear safety on the station at this time. Therefore, no additional regulatory action arising from this visit is currently considered to be necessary.

The overall outcome from the inspection is that no electrical issues have been identified from this work that should affect the return to service of R1, on completion of the planned and emergent work.