Office for Nuclear Regulation

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Heysham 1 Power Station - System Based Inspection (SB11) - Fire Protection, joint inspection with a team from EDF NGL’s Independent Nuclear Assurance Department

Executive summary

Purpose of Intervention

The purpose of this intervention was to carry out a joint inspection of fire protection systems with EDF Nuclear Generation Limited’s (NGL’s) Independent Nuclear Assurance (INA) Department. The inspection constituted both a system based team inspection under NGL’s internal processes, and an ONR system based inspection of compliance with Licence Conditions (LC) in line with the planned inspection programme contained in the Heysham 1 Integrated Intervention Strategy (IIS) for 2016/17.

Interventions Carried Out by ONR

This intervention: consisted of a System Based Inspection, SBI-11 - Fire Detection, Suppression, Barriers, Doors and Dampers, which included compliance inspections against the following Licence Conditions (LCs):

Explanation of Judgement if Safety System Not Judged to be Adequate

From the areas sampled during this inspection, I judged that overall the fire protection systems met the requirements of the safety case and are adequate.

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

The joint inspection with INA was a system based inspection. I ensured during the planning phase of the inspection that the approach and the evidence gathered would be capable of allowing me to make judgements against the licence conditions that would ensure it met the requirements of ONR’s process for system based inspection.

The team found it worthwhile to raise two OFIs (opportunities for improvement) and left several other low-level issues for station to progress. I have considered the significance of each low-level issue and confirm that this approach is appropriate and that none require specific tracking by ONR. INA also reported on the overall health of the fire protection systems for the five aspects. The feedback from the joint inspection was well received by station management, both because the overall message was positive, and also that the findings would allow additional focus on improvements.

With respect to the SBI against ONR’s approach I was able to make the following judgements:

Conclusion of Intervention

Following the system based inspection of fire detection, suppression, barriers, doors and dampers systems I judged firstly that the company had benefited from the joint inspection in which I participated. This had generated some valuable learning points and actions to improve the station focus. Secondly I judged that compliance with LC10, 23, 24, 27 and LC28 met the expected standards and were rated as green. Overall I concluded that the systems met the requirements of the safety case.

There are no findings from this inspection that could significantly undermine nuclear safety. At present, no additional regulatory action is needed over and above the planned interventions of Heysham 1 power station as set out in the Integrated Intervention Strategy, which will continue as planned.