Office for Nuclear Regulation

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Hunterston A inspection week

Executive summary

Purpose of Intervention

This inspection was carried out as one of a series of planned inspections of operations undertaken at the Magnox Ltd Hunterston A (HNA) site.

Interventions Carried Out by ONR

Compliance Inspections relating to Licence Condition (LC) 6 (Documents, records, authorities and certificates), LC17 (Management systems), LC25 (Operational records), LC10 (Training) and LC12 (Duly authorised and other suitably qualified and experienced persons) were undertaken. A Systems Based Inspection (SBI) on the Wet Intermediate Level Waste Retrieval and Encapsulation Plant (WILWREP) was undertaken. Other meetings included an Action/Issue review, a meeting with Site Safety Representatives and a meeting to discuss LC14 (Safety documentation) compliance.

Explanation of Judgement if Safety System Not Judged to be Adequate

N/A.

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

The SBI on WILWREP identified no matters of concern for the site. I questioned plant labelling of Safety Mechanisms, Devices and Circuits (SMDC) during a previous inspection at HNA and was pleased that the site had followed up on this enquiry. I established that corporate guidance is that no distinct labels should be used (although Tags are used).

I found HNA site to be complying with it arrangements under LC6, LC10, LC12 and LC25.

I found HNA site to be complying with its arrangements under LC17. However, I consider that the recent rollout of the SharePoint and Q-Pulse systems has not been appropriately impact-assessed.

I observed that good progress appeared to be being made on actions previously placed on site under LC10 and LC12. I asked that HNA consider what might be done to formalise their review process for Duly Authorised Persons and will seek their views during my next site visit.

I discussed the Magnox application of their arrangements under LC14 following a previous site inspection and consider that there is a potential shortfall against ALARP assessment.

Conclusion of Intervention

I conclude that WILWREP adequately fulfils the requirements of the Safety Case.

I consider that no formal action is required of HNA following compliance inspections covering LC6, LC10, LC12, LC17 and LC25.

I shall seek ONR specialist guidance on relevant good practice for the labelling of SMDC and Magnox Ltd's approach to ALARP assessment to inform future interactions.