Office for Nuclear Regulation

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Sizewell B compliance inspection

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 2016/17.

Interventions Carried Out by ONR

As part of this intervention, I carried out compliance inspections against licence conditions LC 8: Warning notices, LC 9: Instructions to persons on site and LC 26: Control and supervision of operations. The inspection was based on sampling the implementation of the arrangements in place at the station against the licence condition and ONR inspection guidance.

Explanation of Judgement if Safety System Not Judged to be Adequate

No safety system inspection was undertaken, hence this is not applicable.

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

I found the written arrangements in place to comply with LC 8 to be in line with ONR guidance however Sizewell B were not implementing one of the requirements to have a register of safety signs. This minor omission has not manifested in shortcomings in the inspection and maintenance of signs, however I have raised ONR issue to track corrective action of this omission. This inspection was rated as Green taking into account this minor compliance issue.

The arrangements in place to comply with LC 9 are in line with ONR guidance and are being complied with at Sizewell B. A new dynamic learning activity has been introduced for site induction training which is considered to be good practice and provides an interactive process. I have rated this inspection as Green for compliance with arrangements taking into account some examples of good practice which have been observed.

From an unannounced out of hours inspection I found the control and supervision of operations, performed to written test procedures, controlled through the main control room to be in line with expected good practice and ONR guidance for LC 26 for which I have rated this inspection as Green.

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.