Office for Nuclear Regulation

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Dungeness B Planned Intervention

Executive summary

Purpose of intervention

This was 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

The key interventions during this inspection were for licence compliance covering the following licence conditions (LC):

Explanation of Judgement if Safety System Not Judged to be Adequate

Not applicable

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

For LC 12, I inspected the site’s arrangements for compliance with the LC and judged that they were adequate.  To inspect their implementation, I reviewed the training records and authorisations for a sample of operational duly authorised persons (DAP).  I found that one of these had elements of training that were not up to date and hence asked the site to identify whether there were any other examples.  This revealed some other DAPs with training shortfalls and the site took prompt action to remedy the position.  Although the compliance is now adequate, I judged that compliance against LC 12 at the time of the inspection was below standard and hence assigned this an Integrated Intervention Strategy (IIS) rating of 4.

For LC 22, I inspected the site’s arrangements and found them to be adequate.  When inspecting the implementation of the arrangements, I looked at three modifications.  Whilst there were no problems with two of these, I found that the quality plan for the third had not been correctly completed and hence the site had not provided adequate evidence that the job had been satisfactorily completed.  The site has made a proposal to rectify this, for this job, but not looked at whether this is a symptom of a wider problem.  I have judged this to demonstrate compliance below standard, have assigned it an IIS rating of 4 and will follow it up during my next visit to site.

For LC 26, the site described its control and supervision of operations, and I judged that these were acceptable.  I inspected operations on the site at the time of the inspection and found that these were suitably controlled.  I therefore judged that control and supervision was adequate and hence assigned this an IIS rating of 3.

In relation to the other activities undertaken in this intervention, no key findings arose.

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

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.