This was a planned inspection of Magnox Ltd's Wylfa power station, undertaken as part of the planned intervention strategy for the Decommissioning, Fuel and Waste (DFW) Programme of the Office for Nuclear Regulation (ONR).
The work was carried out in line with the planned inspection programme contained in the Wylfa Integrated Intervention Strategy (IIS).and Magnox Ltd Corporate IIS.
Planned inspections of Licence Conditions (LCs), 32, 33, and 34.
The following meetings were also undertaken:
No safety system based inspections were undertaken during this intervention.
This compliance inspection against Licence Conditions 32, 33 and 34 provided the opportunity to cover two distinct areas relevant to radioactive waste management. Firstly, the inspection considered progress against findings from the periodic safety review, particularly plans for future radioactive waste management through defueling and into care and maintenance preparations and the related safety case. Secondly, current maintenance work on fuelling machine 2 (FM2) has highlighted the value in inspecting arrangements for the management of additional waste streams created through non-routine operations and maintenance activities.
During the inspection an area used for interim storage of a high dose item was not appropriately signed, cordoned and the lid not fitted as might be expected under the Ionising Radiations Regulations (IRRs) 1999. The matter was raised with the lead team and the licensee has now provided a formal incident report to ONR. A Level 3 Regulatory Issue is proposed for consideration by the ONR Magnox Delivery Management Group and further consideration will be given to any appropriate enforcement action following our investigation which will take into account Magnox Ltd's investigation.
The inspection also identified opportunities for improvement in reducing risks of fire in the vicinity of one of the ILW stores. Advice is being sought from ONR Fire Safety Inspectors on this matter.
Notwithstanding the issues identified during the plant inspection it is concluded that the current site arrangements and implementation for the management of radioactive waste are broadly satisfactory. The following inspection ratings are assigned:
The additional meetings undertaken to review current activities, issues and incidents provided positive feedback on the approaches to continuous improvement on the site.
From the information obtained and evidence gathered during this intervention, I believe there were no issues identified that were considered to adversely affect nuclear safety.
ONR's investigation continues of the matter of an apparent failure to adequately control radioactive matter, and ensure restriction of exposure, during maintenance of one of the fuelling machines.