Office for Nuclear Regulation

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Conduct of Inspection in support of IIS

Executive summary

Purpose of intervention

In line with the 2016/17 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 (LC) 22 modification or experiment on existing plant, LC 26 control and supervision and LC 32 accumulation of radioactive waste within the Research Reactor Reprocessing Facility (RRRF) and Dounreay Cementation Plant (DCP).  I had routine meetings with members of the senior management team and the Full-time Safety Representative.

Explanation of Judgement if Safety System Not Judged to be Adequate

N/A

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

In both facilities I found adequate compliance with DSRL arrangements made under LC 22.  Modifications were being correctly categorised and underpinned by the necessary safety justifications.  Proactive measures were being taken for the minimisation of operator dose during the modifications.  

The modification being planned in DCP was to encapsulate Prototype Fast Reactor (PFR) raffinate which will form a passively safe product suitable for long term storage and hence meet ONR expectations for the accumulation of radioactive waste.  Within RRRF suitable waste routes had been identified for the management of radioactive waste arising from planned work.   

I witnessed maintenance activities being undertaken by operators in air-fed suits in the RRRF and was satisfied that the necessary level of control and supervision was being applied.  

Conclusion of Intervention

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