Office for Nuclear Regulation

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Winfrith - Compliance Inspection

Executive summary

Purpose of Intervention

This inspection on the Winfrith licensed site was undertaken as part of a programme of planned interventions as outlined in the site inspection plan for 2017/18.

Interventions Carried Out by ONR

During this intervention, I carried out a compliance inspection against the following licence conditions.

The inspection comprised plant inspection, office-based examination of procedures and records and interviews with staff.  Whilst on site I also held a meeting with the licensee on its safety culture, and to discuss and follow up on the status of actions, and held meetings to discuss a number of routine matters.

Explanation of Judgement if Safety System Not Judged to be Adequate

Not applicable.

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

In relation to LC35, my inspection focused on the licensee’s plan to decommission the Steam Generating Heavy Water Reactor (SGHWR) core. Whilst the licensee is at the early stages of this decommissioning project, the overall strategy is coherent. I found that the licensee is implementing its arrangements adequately to enable the SGHWR core to be decommissioned.

In relation to LC32 I inspected the licensee’s arrangements for storing radioactive waste and recording accumulated waste. I targeted three waste streams for inspection and based my findings on this sample.   I consider that the licensee is adequately implementing its arrangements to minimise its stored wastes. I found that where waste is being stored that currently have no disposal route, the licensee has suitable arrangements for the management of these radioactive wastes. Despite this I consider that Magnox Ltd should accelerate its programme to identify solutions for wastes that have no current disposal route or long term storage solution.

With regard to LC33, I found that the licensee was able to demonstrate compliance to LC 33 through its written arrangements.

In relation to Licence Condition 34, I inspected the licensee’s arrangements for the storage of radioactive waste. I found that the licensee’s radioactive waste is adequatley packaged and stored so that radioactivity cannot leak or escape. I also found that the licensee is monitoring the condition of stored wastes to ensure that any leak or escape of radioactivity cannot occur without being detected.

Conclusion of Intervention

From the evidence gathered during this inspection, I conclude that there are no matters that may impact significantly on nuclear safety.