Office for Nuclear Regulation

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Torness - Outage Inspection

Executive summary

Purpose of Intervention

This report covers an outage inspection of EDF Energy Nuclear Generation Ltd (NGL) Torness Nuclear Licensed Site undertaken during Reactor 1 periodic shutdown, in line with ONR's Civil Nuclear Reactor Programme Strategy 2015-2020. The inspection focussed on electrical aspects of the Outage Intentions Document (OID) and was undertaken by an ONR specialist electrical inspector.

Interventions Carried Out by ONR

The inspection considered the electrical work being undertaken as part of the Unit 1 periodic shutdown, including the planned work from the Outage Intentions Document (OID) and any emergent work in this area.

This intervention was an information exchange inspection assessing the licensee's progress in the implementation of Licence Conditions (LCs) 28 and 22 arrangements for Unit 1 electrical outage activities.

Explanation of Judgement if Safety System Not Judged to be Adequate

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

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

An inspection of Unit 1 outage related electrical activities was carried out as part of the programme of outage related safety inspections included on the Torness site intervention plan for 2017 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 Unit 1 are that the implementation of the LC 28 and LC 22 arrangements for the electrical equipment are deemed to be satisfactory. Therefore I have assigned an ONR Inspection rating of Green to LC 22 and LC 28.

Conclusion of Intervention

From the evidence gathered during this intervention, I am satisfied that the Torness Unit 1 outage activities are being managed appropriately by the licensee. With over 40% of activities completed no electrical issues have been identified from this work that should affect the return to service, on completion of the planned work. No items have been identified from the Outage Intentions Document which the station is planning to defer.

Based on this intervention and interactions with the licensee I expect that OID electrical work will be completed and no deferrals are expected. Should deferrals become necessary, these will be justified under the station's arrangements. Therefore I am able to support a re-start of Unit 1 and operation for a further period.