Office for Nuclear Regulation

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Bradwell and Sizewell A - 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 examined arrangements to confirm compliance with the following Licence Conditions:

The focus of the SBI was directed to the preparation of the necessary management arrangements to run the site in C&M.

I was accompanied by ONR Magnox Ltd Corporate Inspector, Radioactive Waste, and Radiological Protection Specialist Inspectors who reviewed the arrangements in their respective areas proposed for C&M and clarifying and resolving the Magnox Ltd responses to the ONR queries raised during the assessment of the Bradwell C&M safety case.

Explanation of Judgement if Safety System Not Judged to be Adequate

The preparations for C&M were 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 do not intend the date for C&M to slip beyond November.

The specialist assessors were able to resolve the bulk of their queries raised during the ONR assessment of the C&M Safety Case and their reports are referenced separately.

The ONR Corporate Inspector was able to review progress at both sites in advance of a senior level meeting with the Magnox Ltd Directors.

At Sizewell A the management arrangements are starting to make progress although this has not translated as yet into completed operating and maintenance procedures. The project team has been strengthened by the addition of two experienced project engineers and more measureable progress is anticipated over the next two months.

The ponds project continues to make safe and efficient progress the work now focussing on deplanting the ponds. Transfers of the size reduced waste from the ponds for packaging and transport should start soon.

The FED retrievals project has been delayed due to difficulties with placing the contract for detailed design. The remaining contractor in the bidding process is still negotiating over the cost of the retrievals building to sit on top of the FED vaults.

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 November 2018.

A lot of work remains to be done on the management arrangements.to get them ready in time. The strengthening of the team will greatly assist the achievement of this part of the programme.