Office for Nuclear Regulation

Conduct Inspection in support of IIS

Executive summary

Purpose of intervention

In line with the 2015/16 inspection plan for Dounreay I carried out planned inspections and other interventions to provide confidence that Dounreay Site Restoration Ltd. (DSRL) is controlling its hazards properly and complying with its statutory obligations.

Interventions Carried Out by ONR

I undertook compliance inspection against Licence Condition 22 Modifications and Experiments on Existing Plant within the ILW Liquor Storage Facility and the Fast Reactor Reprocessing Facility which is undergoing decommissioning.  I had a number of interventions to monitor progress in decommissioning programming, improvement initiatives and plant status.  I met with members of the senior management team to discuss general site matters.

Explanation of Judgement if Safety System Not Judged to be Adequate


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

My Licence Condition 22 interventions provided evidence that modifications are being appropriately categorised, scrutinised and underpinned by adequate levels of hazard identification and engineering substantiation. This meets ONR expectations as described in NS-INSP-GD-022 Revision 3.  The modification to encapsulate waste flocculant has been categorised as B and a Pre-Construction Safety Report is in the process of being peer reviewed prior to scrutiny by the site Safety Working Party as required under DSRL arrangements.

Decommissioning progress was evident during plant visits and work is in hand to underpin the decommissioning programme going forward.

Conclusion of Intervention

The intervention did not identify any matter impacting on nuclear safety that required immediate regulatory action.