Office for Nuclear Regulation

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Sizewell B - Planned intervention

Executive summary

Purpose of intervention

The purpose of this intervention was to undertake licence condition (LC) compliance inspections at EDF Energy Nuclear Generation Limited (NGL) Sizewell B power station in line with the inspection programme contained in the Sizewell B integrated intervention strategy (IIS) for 2015/16.

Interventions Carried Out by ONR

As part of this intervention, I carried compliance inspections against licence conditions LC 27: Safety mechanisms, devices and circuits and LC 28: Examination, inspection, maintenance and testing.  The inspections were based on sampling the implementation of the arrangements in place at the station against each licence condition and ONR inspection guidance.  This intervention report also records a number of regulatory information gathering meetings with the site trade union representatives and the station internal regulator. 

Explanation of Judgement if Safety System Not Judged to be Adequate

Not applicable to this intervention.

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

The Licensee has defined primary implementation and secondary supporting documents for compliance with LC 27.  From the inspection undertaken I judge that the arrangements in place at the station are adequate to ensure that a plant is not operated, inspected, maintained or tested unless suitable and sufficient safety mechanisms, devices and circuits are properly connected and in good working order. 

The Licensee has various arrangements for the regular and systematic examination, inspection, maintenance and testing (EIMT) of all plant which may affect safety.  These arrangements cover both technical specification requirements and also other safety related plant.    From the evidence seen and the discussion held with station personnel, I consider that the arrangements sampled for compliance with LC28 are adequate; with no regulatory issues being raised.

Meetings with the trade union representatives and internal regulator covered a range of areas including conventional safety, safety rules and outage planning with no regulatory issues being raised.

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 information gathered and evidence obtained during this intervention, no matters have been identified that are likely to have significant impact on nuclear safety on the station at this time. Therefore we consider that no additional regulatory action arising from this visit is necessary currently, and the interventions for Sizewell B power station, set out in the integrated intervention strategy, should continue to be implemented as planned.