Office for Nuclear Regulation

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Bradwell site - Readiness inspection in relation to the proposed conditioning (drying) of ILW in Ductile Cast Iron Containers

Executive summary

Purpose of intervention

This report describes an inspection of the readiness of the Bradwell site to undertake bulk conditioning (drying) of wet Intermediate Level Waste (ILW) sludge and resin in Ductile Cast Iron Containers (DCICs). This activity is subject to a hold point on the Bradwell Regulatory Schedule, release of which will be by means of issue of a Licence Instrument by ONR.

Interventions Carried Out by ONR

I, together with colleagues from ONR and the Environment Agency, carried out an inspection of the readiness of the licensee to commence conditioning (drying) of ILW. This involved inspection of:

Explanation of Judgement if Safety System Not Judged to be Adequate


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

The inspection revealed that the licensee has made progress in developing the WPrS and other documentation relevant to ILW conditioning. However, the licensee has not yet fully demonstrated that the packages made will comply with the WPrS to the satisfaction of ONR. I have placed an action on the licensee to address the shortfalls identified and provide evidence of its completion to ONR.

The licensee has put in place adequate arrangements for the acceptance of waste packages into the ISF and is complying with corporate arrangements for the management of non-conforming packages. Work to implement the corporate standard on inspection and monitoring is in hand. I judge that the licensee has made sufficient progress on inspection and monitoring to close the relevant recommendation from my assessment report relating to the licensee's proposals. ONR and the Environment Agency (EA) will continue to engage with the licensee on inspection and monitoring arrangements.

I judge that the licensee has a systematic process in place for the management of forward actions in the safety case for the ISF and for modifications to the case to take account of future changes.

I judge that the licensee has provided adequate evidence on other issues to close out two other recommendations from my assessment report relevant to compliance with the WPrS.

Conclusion of Intervention

From the evidence gathered during this intervention, I have identified no new matters that are likely to have a significant impact on nuclear safety. For many of the aspects sampled during the inspection the arrangements and their implementation were judged to be adequate. However, I identified the need for further improvement in some areas and I have placed a number of actions on the licensee to address these matters.