Office for Nuclear Regulation

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Dungeness B - update on flask receipt and dispatch improvements and quarterly review of regulatory issues

Executive summary

Purpose of Intervention

This was a planned inspection at EDF Energy Nuclear Generation Ltd's (NGL's) Dungeness B power station. It was undertaken as part of the planned intervention strategy for the Operating Facilities Division (OFD) 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

No system based inspection undertaken, hence not applicable.

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

In November 2017, I conducted an unplanned compliance inspection focussed on the flask receipt and dispatch operations and improvements made since an event in May 2017. Based upon the observations made during November's inspection, I judged that the station's management arrangements as required by Carriage of Dangerous Goods and Use of Transportable Pressure Equipment Regulations (CDG) 2009 were not suitable and sufficient.

Post inspection, the station director embargoed flask movements and a fully resourced improvement plan was implemented to address the shortfalls in the managements arrangements. This includes oversight and governance from the Operational Safety Review Committee and independent assurance through INA concurrence.

In light of the above, I therefore undertook a follow up inspection, during which I;

I am of the opinion that improvements are being made to the work environment, the operational controls and the training. Oversight and independent assurance is being undertaken to ensure that shortfalls in the management arrangements are addressed sufficiently.

I also undertook routine engagements with the station and the independent nuclear assurance team to discuss operational performance including recent events. I judge that the station is taking the appropriate action to management performance and investigate events. No significant nuclear safety concerns were raised during these discussions.

I undertook a quarterly review of regulatory issues and discussed progress on a selection with the station leads. The information received will be used to update ONR's regulatory issues, no significant safety concerns were raised during these discussions and progress is being made in the majority of areas. One historic regulatory issue relating to maintenance compliance requires further clarity on the current remaining shortfall and will be followed up prior to the next quarterly review.

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

I am of the opinion that improvements are being made to the work environment, the operational controls (including measuring and test equipment and documented instructions) and the training. These actions are addressing shortfalls in the management arrangements supporting compliance with CDG 2009. Recognising that the improvements have not been implemented in full, I have assigned an IIS Rating of AMBER illustrating that improvement has been made since the last inspection in November.