Office for Nuclear Regulation

Planned intervention - Hinkley Point B

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 support from ONR inspectors:

The intervention was performed in line with ONR’s guidance requirements (as described in our technical inspection guides) in the areas inspected.

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

The annual review of safety included a presentation by NGL of the station performance over the past year and a plant walk down.  The plant walk, which concentrated on the turbine hall, fuel storage pond, active effluent treatment plant and the new Nitrogen plant identified a number of safety enhancements that had been implemented throughout the year and other on-going activities.  The review meeting was focused on the station performance over the past year and allowed relevant good practices and areas for improvement to be discussed.  ONR was content with the outcome of the review meeting.

For LC8 (warning notices): I concluded that that warning notices were correctly deployed on site and that information was presented in a clear, consistent and appropriate manner.  I found evidence that the warning notices were being maintained and reviewed, and some on-going initiatives were noted regarding the control of safety signs.  I therefore assigned an IIS rating of – 3 (adequate) to this inspection.

For LC26 (control and supervision of operations): I was satisfied that the site had developed processes to ensure correct alignment, control and surveillance of plant status and configuration.  This is an important part of ensuring that operations important to safety are carried out under the control and supervision of suitably qualified and experienced persons.  I therefore assigned an IIS rating of – 3 (adequate) to this inspection.

I reviewed the ONR Issues database and the progress that was being made to address the issues.  I will review the database routinely every quarter.

I attended the Hinkley Point Site Stakeholder Group meeting.  I was satisfied with the discussions at the meeting which enabled me to interact with stakeholders and explain ONR’s regulatory activities.

I met with an Independent Nuclear Assurance (INA) Inspector on site to review recent events using the standard INA/ONR agenda.  The recent incident at the buffer store, field supervision, fuel route improvements and quality improvement initiatives on site were discussed.

Conclusion of Intervention

There are no findings from this inspection that could significantly undermine nuclear safety.