Office for Nuclear Regulation

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Heysham 1 - Level 1 Exercise Milner and LC6, 11 and 25 Compliance Inspection

Executive summary

Purpose of Intervention

The purpose of this intervention was to undertake regulatory inspections at EDF Energy Nuclear Generation Limited (NGL) Heysham Power Station in accordance with ONR's Integrated Intervention Strategy (IIS) 2017-2018 for the Operating Reactors Sub-Division. This report covers the nuclear safety-related inspection of Heysham power station, which was undertaken as part of routine planned and reactive interventions.

Interventions Carried Out by ONR

The following interventions were carried out:

The intervention was performed in line with ONR’s guidance requirements (as described in our technical inspection guides) in the areas inspected.

Explanation of Judgement if Safety System Not Judged to be Adequate

Not applicable: No safety system inspection was undertaken during this intervention.

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

For the LC 6 compliance intervention I, the Heysham 1 nominated site inspector judge that a recent station audit of records management and associated improvement plans has provided a sound basis for identifying non conformities with process and identifying appropriate areas for improvement. From my sample that I inspected of the Station's processes, records, equipment and facilities I judge that the LC 6 arrangements and their implementation meet the expected standard and no regulatory issues have been raised on the basis of the actions already identified in Station improvement plan. I have rated this inspection as Green.

For the unannounced LC 25 compliance intervention I, the Heysham 1 nominated site inspector judge that, from my sample inspection of the Station's operational records the LC 25 arrangements and their implementation meet the expected standard. No regulatory issues have been raised on the basis of the existing Central Technical Organisation oversight of the proposed changes to the existing arrangements. I have rated this inspection as Green.

I, the Heysham 1 nominated site inspector considered that exercise "Milner" provided a robust challenge to the implementation of the emergency arrangements at Heysham 1 with a number of learning opportunities identified. It was positive to note the approach in relation to providing significant challenge for the emergency response organisation. The exercise "Milner" provided an adequate demonstration of the station emergency arrangements for the current year and the staff responded well to a challenging scenario. This inspection has been rated as Green through the Integrated Intervention Strategy (IIS).

I, the Heysham 2 nominated site inspector found that Heysham 2 is progressing satisfactorily with its outage preparations with no significant issue that may impact on the planned outage timescales. ONR will attend the formal outage intensions meeting which is planned for the 7th December 2017.

Conclusion of Intervention

From the information gathered and evidence obtained during this intervention, no matters have been identified that are likely to have significant impact on nuclear safety on the station at this time. Therefore I consider that no additional regulatory action arising from this visit is necessary currently, and the interventions for Heysham power station, set out in the integrated intervention strategy, should continue to be implemented as planned.