Office for Nuclear Regulation

Hunterston A – Inspection ID: 52896

Date(s) of inspection

  • December 2023

Executive summary

Aim of inspection

The aim of the inspection is to determine whether Magnox is implementing the corporate arrangements for waste records on the site. In addition, the aim of the inspection is to determine whether Magnox is implementing the corporate arrangements for reporting and investigating site incidents appropriately.

Subject(s) of inspection

  • LC6 – Documents, records, authorities and certificates – Rating: Green
  • LC7 – Incidents on the site – Rating: Green
  • LC25 – Operational records – Rating: Green

Key findings, inspector’s opinions and reasons for judgement made

I led a planned compliance inspection of Magnox Limited’s LC 6 (Documents, records, authorities and certificates), 7 (Incidents on the site) and 25 (Operational Records) arrangements. I targeted the High Active Waste (HAW) operations for LC6 and LC25.The inspection team comprised the nominated site inspector and a Nuclear Liabilities inspector. A Nuclear Internal Hazards and Site Safety Inspector joined remotely for part of the LC 7 inspection.

For LC6 and LC25, the licensee provided suitable evidence to demonstrate that they had adequate arrangements for recording and storing documentation associated with the creation of HAW packages at the site. Furthermore, the licensee provided evidence to demonstrate that they adequately implemented these arrangements via quality plans. However as there is no definition of what records to keep from Nuclear Waste Services (NWS) the licensee is keeping all information associated with the waste. I view that site could improve this by engaging with NWS corporately. Nevertheless, I judge that Magnox are adequately implementing the LC6 and LC25 arrangements for storage of HAW records and I judge a rating of Green.

For LC 7, I sampled several incidents and considered the licensee response to these including initial categorisation of the event. I viewed that Magnox could improve the incident feedback however, I considered that the licensee was able to demonstrate adequate implementation of arrangements for the recording and follow-up of incidents on the site. I judge that Magnox are adequately implementing the LC7 arrangements for incident reporting and I judge a rating of Green.

During this inspection I also held an engagement with the safety representatives and held an update on the LC35 decommissioning milestones. For the LC35 milestones the licensee is changing the reporting to two milestones one focussed on operational ILW and the other on reactor ILW. I requested further information on the scope of these milestones and what constituted the end point.

Conclusion

I consider that the licensee has provided adequate evidence that it controls documents and records generated during the HAW process appropriately. Consequently based on my inspections findings I judge a rating of adequate (green) is appropriate for LC6 and LC25.

Based upon my sampling and the evidence presented by the licensee, I am content that there is adequate implementation of arrangements for incidents on the site, including their reporting, screening, classification, investigation, and learning (via corrective actions). I therefore judge that, in relation to LC 7, an ONR inspection rating of adequate (GREEN) is appropriate for this intervention.