Office for Nuclear Regulation

Bradwell - SBI on preparations for Care and Maintenance operations

Executive summary

Purpose of Intervention

This inspection at the Bradwell and Sizewell A nuclear licensed sites was part of a programme of planned inspections as outlined in the Integrated Intervention Strategy (IIS) for 2018/19.

Interventions Carried Out by ONR

During this inspection, I carried out a project focused systems based inspection on the preparations for entry to Care and Maintenance (C&M) operations.  The inspection was entirely devoted to the observation of several key commissioning tests of the C&M management arrangements to confirm compliance with the following Licence Conditions:

The focus of the SBI was directed to the demonstration of adequate management arrangements to run the site in C&M. The arrangements being demonstrated were concerned with the safe manned entry into the closed, cold and dark facilities and the establishment of a safe working environment to undertake inspections or remedial work on the facilities as required.

Explanation of Judgement if Safety System Not Judged to be Adequate

The demonstration of the arrangements was considered adequate to deliver the safety functions in the safety case.

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

Magnox Ltd is continuing to make safe progress with the preparations to enter C&M. Work at Bradwell is mainly focussed on the physical works necessary to prepare the site and the work at Sizewell A is mainly focussed on delivering the operational and maintenance arrangements necessary to run the site remotely. There is a lot of work still to complete however Magnox still aim to achieve C&M in October 2018.

The commissioning tests were successful in providing confidence that adequate arrangements will be put in place for C&M and that the opening up of a closed cold and dark facility can be done safely.

The entry procedure for the closed facilities proved an involved process requiring sweeps for radioactive contamination and asbestos fibres alongside any inspections of stairwells and elevated walkways. Magnox need to monitor its arrangements in respect of the number of people that attend site and how much equipment is required to support the work.

Conclusions of Intervention

From the evidence gathered during this intervention I consider that the preparations for C&M will deliver the required safety functions as defined in the safety case.

The physical preparation of the Bradwell site continues to make safe progress such that the site should be ready for the agreed date for C&M in October 2018.

The commissioning tests were successful in demonstrating adequate arrangements for opening up a closed cold and dark facility safely during C&M.