Office for Nuclear Regulation

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Dungeness B Licence condition 36 compliance Inspection focussed on Fatigue Management and Working Time Directive

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

I undertook a planned intervention against LC36, focusing on fatigue management, during which I found the following:

I undertook routine engagement with the station and the independent nuclear assurance team to discuss outage and station 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.

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

In relation to LC36 compliance inspection - fatigue management, I judge no formal action is required. Although there is a good level of understanding regarding fatigue management across the station and evidence of management working time, I judge there is a minor failure to implement licensee's compliance arrangements relating to completion of working time risk assessments. I have raised a regulatory issue requesting the station to improve the quality of working time risk assessments.