Office for Nuclear Regulation

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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 2016/17.

Interventions Carried Out by ONR

This intervention included compliance inspections against the following Licence Conditions:

I met with the station independent nuclear assurance (INA) station evaluators to review the station’s safety performance and internal regulatory surveillances undertaken during the previous month.

I also attended the station’s annual emergency arrangements review meeting alongside the ONR civil nuclear security inspector. During this meeting the station presented a summary of its performance in emergency preparedness during the previous 12 months. Overall, this was a positive reflection on performance over the past 12 months, but more importantly a forward-looking bias that represents an enhancement to previous annual reviews.

During this intervention, the programme director for the operating facilities programme undertook a familiarisation visit to the station. During the visit he met with the management team, examined progress against recent enhancements to safety and security and preparations for a forthcoming planned shutdown of Reactor 3. He was complimentary to the nuclear safety culture evident on the station and drive for continuous improvement.

Explanation of Judgement if Safety System Not Judged to be Adequate

Not applicable as no system inspection was undertaken during this intervention.

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

I undertook a planned intervention against LC 26, during which I:

Observed start of shift briefings and setting to work of maintenance staff. There are two demographics evident in the team; a cohort of younger maintenance technicians recently time-served as apprentices, the second representing more experienced personnel approaching retirement. The deputy team leader allocated tasks taking into account the development needs of younger technicians to acquire skills. It was evident that this team is actively utilising the more experienced technicians to transfer knowledge and skills to those newer to the craft.

Undertook task observations relating to routine maintenance work being undertaken in the Gas Circulator workshop. During this inspection I observed appropriate standards of setting to work, point of work risk assessment and procedural use and adherence.

This 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

In relation to LC 26, I considered that an inspection rating of ‘Green’ is warranted on the basis that the records and behaviours I observed reflected good standards of control and supervision of maintenance staff on the station. In relation to the supervisors observed during the inspection, training, competency and SQEP records were complete.

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