Office for Nuclear Regulation

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Dungess B - Planned Intervention

Executive summary

Purpose of intervention

This is a planned inspection at EDF Energy Nuclear Generation Ltd's (NGL's) Dungeness B (DNB) power station, undertaken as part of the planned intervention strategy for the Civil Nuclear Reactor Programme (CNRP) of the Office for Nuclear Regulation (ONR).

Interventions Carried Out by ONR

I (nominated site inspector) attended the Dungeness A & B power stations' Emergency Planning Consultative Committee (EPCC) on 10 July 2014.

As part of information gathering I attended a planning telecon for the DNB Level 1 emergency exercise on 1 April 2015 and a scoping telecon for the DNB Level 2 emergency exercise on 11 March 2015. I also inspected NGL's work to improve learning from unplanned reactor shutdowns across the fleet.

Explanation of Judgement if Safety System Not Judged to be Adequate

Not applicable.

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

In relation to improving learning from unplanned shutdowns across the fleet I consider that the new Significant Learning Oversight process and the analysis of unplanned shutdowns at four stations over the last five years are capable of producing improvement. I suggested that further analysis to define repeat events amongst unplanned shutdowns would help provide data to monitor expected improvements. I did not raise an issue relating to this, since the new process is an improvement beyond that expected for compliance with Licence Condition 7 "Incidents on the Site".

No intervention ratings were assigned during this intervention.

The licence conditions were inspected against ONR's published guidance requirements (as described in our technical inspection guides).

Conclusion of Intervention

From the 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 considered necessary at this time.