Office for Nuclear Regulation

Hinkley Point B Power Station -  Planned Inspection

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) carried out compliance inspections on Licence Conditions (LC) 7 (incidents on the site), 13 (nuclear safety committee) and 22 (modification or experiment on existing plant).

I also participated in a COMAH (Control of Major Accident Hazards) regulations inspection, reviewed a number of conventional health and safety matters on the site, met with Independent Nuclear Assurance and discussed recent events on the site.

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

I found that:

A planned COMAH (Control of Major Accident Hazards) regulations inspection was carried out.  COMAH applies mainly the chemical industry, but some nuclear sites qualify under the regulations if threshold quantities of some substances are stored.  The inspection did not reveal anything of concern but a number of enhancements to fire resistance in bunding for flammable liquids, repairs to the bases of bulk fuel tanks and management of ageing plant were discussed.

I reviewed a number of conventional health and safety matters on site including a recent event on site that resulted in the partial amputation of an operators finger, lifting operations, slips, trips and falls, working at height and vehicle movements on the site.

I met with the Independent Nuclear Assurance (INA) evaluators on site to discuss a number of issues and promote effective working interactions.  On this occasion we discussed the INA staffing levels, preparation for the statutory outage, fuel route enhancements, safety rule events and the graphite crack safety case at Hunterston B

Whilst on site I discussed a number of topics including the recent leakage of pond water into the active effluent treatment plant, an event at the buffer store resulting from a pressure imbalance on an interlock, station performance in 2015 and preparations for the Reactor 3 statutory outage.

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.