Office for Nuclear Regulation

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Hinkley Point B Power Station - Planned Intervention

Executive summary

Purpose of intervention

This was a planned inspection of EDF Energy Nuclear Generation Ltd’s (NGL’s) Hinkley Point B power station, undertaken as part of the planned intervention strategy for the Civil Nuclear Reactor Programme (CNRP) of the Office for Nuclear Regulation (ONR).

The work was carried out in line with the planned inspection programme contained in the Hinkley Point B Integrated Intervention Strategy (IIS).

Interventions Carried Out by ONR

I (the nominated site inspector for Hinkley Point B) with the CNRP Programme Manager attended the Reactor 3 start-up meeting as part of the Licence Condition 30 (periodic shutdown) requirements.

I also met with Independent Nuclear Assurance to discuss recent events on the site and attended a graphite progress meeting.

Explanation of Judgement if Safety System Not Judged to be Adequate

Not applicable.  No system inspections were carried out on this visit.

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

For LC30 (periodic shutdown), we concluded that the site had supplied an adequate report in advance of the start-up meeting, a comprehensive site tour and a presentation on the day to highlight key outage information in a succinct manner.  We were satisfied that the NGL requirements for interaction with the Safety Regulator had been met and we therefore assigned an IIS rating of - 3 (adequate) to this inspection.

I met with the INA evaluators (outside of the start-up meeting) to discuss a number of issues and promote effective working interactions.  On this occasion we discussed the INA staffing levels, the statutory outage, fuel route enhancements, safety rule events and results from graphite channel inspections.

I attended a meeting between ONR and NGL to discuss the potential outcomes of the inspection of the graphite core at Hinkley Point B Reactor 3 which proposed a course of action based on a number of different outcomes.  This was a useful meeting which defined possible future regulatory strategies.

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

There were no findings from this inspection that could significantly undermine nuclear safety.  At present, no additional regulatory action is needed over and above the planned interventions of Hinkley Point B power station as set out in the Integrated Intervention Strategy, which will continue as planned.