Office for Nuclear Regulation

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EDF Energy – Nuclear Generation Ltd – Hunterston B planned Intervention

Executive summary

Purpose of intervention

The purpose of this intervention was to undertake Licence Condition [LC] compliance inspections at EDF Energy Nuclear Generation Ltd’s [NGL’s] Hunterston B power station, in line with the planned inspection programme contained in the Hunterston B Integrated Intervention Strategy [IIS] for 2015/16.

Interventions Carried Out by ONR

This intervention included planned compliance inspections against the following Licence Conditions:

Licence Condition 11 – Emergency Arrangements. During this intervention, the CNS site inspector and I attended an annual review of the station’s emergency arrangements.

As part of the LC11 inspection, I undertook, together with an inspector from the Emergency Preparedness & Response [EP&R] programme and a Principal CNS Inspector, an inspection against a generic emergency preparedness capability map. Hunterston B was selected as one of four NGL stations to be subject to a verification inspection against information populated within its capability map; this was in response to a request from UK Government for ONR to provide assurance as to the capability of all licensed sites to respond to a nuclear emergency.

I represented ONR at the biannual Hunterston Emergency Planning Consultative Committee at the strategic coordination centre at Prestwick airport.

Explanation of Judgement if Safety System Not Judged to be Adequate

No system based inspection was undertaken during this intervention.

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

The station presented a comprehensive report on status of emergency arrangements at Hunterston B, including a review of Level 1 safety and counter-terrorist [CT] demonstrations occurring in the past 12 months. We discussed aspects of the scenarios under development for next year’s demonstrations. It is evident that the station continues to invest in its equipment and facilities and has been proactive in benchmarking internally and externally. The station has also demonstrated examples of forward-thinking, notably by encouraging emergency controllers to share experiences and good-practice techniques of command and control.

Inspectors made the following observations and findings in relation to the station capability map:

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

We judged, based on review of emergency preparedness and an inspection of the Hunterston B capability map, that an IIS rating for LC11 of ‘3 – Adequate is appropriate.

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