Office for Nuclear Regulation

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Dungeness B - Planned Intervention - SBI03

Executive summary

Purpose of Intervention

This was a planned inspection of EDF Energy Nuclear Generation Ltd’s (NGL’s) Dungeness B power station, undertaken as part of the planned intervention strategy for the Operating Facilities Programme (OFP) of the Office for Nuclear Regulation (ONR).

The work was carried out in-line with the planned inspection programme contained in the Dungeness B Integrated Intervention Strategy (IIS).

Interventions Carried Out by ONR

During this intervention, the following key activities were undertaken:

Explanation of Judgement if Safety System Not Judged to be Adequate

From our inspection, we judged that the Boiler Feed system met the requirements of the safety case and was adequate.

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

From the System Based Inspection on the BFS we concluded that:

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

Conclusion of Intervention

The system based inspection resulted in areas of improvement being identified in response to minor compliance shortfalls relating to plant condition. Two level 4 regulatory issues were raised in order to monitor the agreed remedial action. After considering all of the evidence presented by EDF NGL we concluded that the arrangements and their implementation, associated with the BFS met the requirements of the safety case and were adequate. An IIS rating of Green (no formal action) is considered to be appropriate for this intervention.

From the evidence obtained during the additional regulatory interventions, no matters have been identified that are likely to have a significant impact on nuclear safety or protection of the public in the event of an emergency on the Station at this time.