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

For LC17 (Management Systems): I examined the Station Quality Management System used by NGL, the initiatives employed to develop and maintain good leadership & safety culture and the self-assessment process. I concluded that these were all to a satisfactory standard and I therefore assigned an IIS rating of – 3 (adequate) to this inspection.

The recent emergency exercise was judged to be an adequate demonstration of compliance against Licence Condition 11 and a valid test of the Hinkley Point B off site emergency plan.  The cold debrief meeting was held to obtain feedback from the exercise participants so that strengths and areas for improvement can be identified.

I met with an Independent Nuclear Assurance (INA) Inspector on site to review recent events including proposed changes to INA representation on site, an incident at the buffer store which occurred earlier this year, fuel route improvements and emergent issues on the site.

I was satisfied with the information exchanged during meetings with NGL staff on a range of topics including recent inspections of the decay heat system and potential future developments of graphite safety cases.

Conclusion of Intervention

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