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 11 (emergency arrangements), 28 (examination, inspection, maintenance and testing) and 27 (safety mechanisms, devices and circuits).

I also reviewed the application of the ionising radiation regulations on the site, met with the site Safety Representatives and Independent Nuclear Assurance, reviewed the ONR issues database 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:

I reviewed the compliance arrangements with the Ionising Radiation Regulations (IRRS) which form the main legal requirements for the use and control of ionising radiation in the United Kingdom.  I reviewed general compliance arrangements and some outage specific activities such as arrangements for vessel entry and open-hole working.  I was satisfied that good procedures were in place to demonstrate compliance.

I met with the site safety representatives to discuss matters on the site including the workings of the Health and Safety Committee (HESAC), transport, conventional safety, car park behaviours, security/bag searching, application of safety rules and consultations with the safety representatives.

I met with an Independent Nuclear Assurance (INA) evaluator on site to discuss the INA quarterly report, preparation for the statutory outage, fuel route enhancements, safety rule events, a recent ONR fire inspection, Radsafe exercise, observations from the Hunterston B outage and management initiatives to enhance performance and promote good behaviours across the site.

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.

Whilst on site I discussed a number of topics including the recent leakage of pond water into the active effluent treatment plant, compliance with the pressurised systems safety regulations, repairs to the dump condenser, the nuclear safety risk indicator, the NGL investigation into a control rod that failed to fully insert during the last Reactor 3 trip and progress with reducing the gas turbine fuel oil inventory.

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.