Office for Nuclear Regulation

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Site Inspection against Licence Conditions 28, 35 and 36 on Operational Records and Control and Supervision of Operations

Executive summary

Purpose of intervention

This record is of my visit to Magnox Ltd’s Oldbury nuclear licensed site as part of ONR’s compliance inspection plan for the site.  A colleague accompanied me on the inspections as a development opportunity.

Interventions Carried Out by ONR

During the intervention we carried out compliance inspections on licence conditions (LC):

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

Our inspection of Examination, Maintenance, Inspection and Testing (EMIT) at Oldbury indicated that the requirements of LC28 were being met and addressed the issues contained in ONR inspection guidance.

We have evidence that Oldbury demonstrated that it meets LC35 requirements for decommissioning when compared with ONR guidance. We noted however that the decommissioning plans are being reviewed with the intention of changing the method of storing ILW from ductile cast iron containers (DCICs) to concrete boxes.  We may need to review the arrangements again before the change occurs to ensure the ILW will remain adequately stored.

We were shown Oldbury’s analysis of the number of nuclear related posts needed to keep operations safe during a quiescent state.  We were also shown the resilience calculations undertaken by the licensee for these posts.  The analyses were adequate for an LC36 demonstration of organisational capability when compared with ONR guidance.  We noted again that Magnox Ltd intends to revise these assessments in the near future. We may need to review the adequacy of the Oldbury’s calculations before they are implemented to satisfy ourselves that appropriate processes are followed for these changes.

Conclusion of Intervention

Our inspection indicated that Oldbury adequately meets the requirements of LCs 28, 35 and 36 currently.  However, Magnox Ltd is looking to change the ways that LCs 35 and 36 are met at Oldbury and other Magnox stations in the near future, which may warrant a review of the changes before they are implemented and during their implementation.