Office for Nuclear Regulation

This website uses non-intrusive cookies to improve your user experience. You can visit our cookie privacy page for more information.

Dounreay Visit

Executive summary

Purpose of intervention

In line with the 2014/15 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 carried out a systems inspection accompanied by a specialist inspector and a site inspector regarding the licensee management of asset care relating to civil structures as part of an ongoing intervention plan.

I met with a range of site staff to discuss current issues. An electrical power failure occurred during the visit and I checked the site's response.

Explanation of Judgement if Safety System Not Judged to be Adequate

N/A. The outcome of the system inspection is reported and rated elsewhere (ONR-DNE-IR-14-006, 2014/166186; and ONR-DNE-IR-14-007, 2014/175242.

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

DSRL manned the emergency control centre to coordinate activities arising from the power failure. Initial damage was noted and contingency measures enacted.

Two unrelated matters arose during the system inspection - standing instrument alarm; potential security breach. DSRL has since written to ONR on the first matter and the response is considered satisfactory. I reported the second matter to CNS at the time and any decision on further action rests with them.

The safety case for the unirradiated fuel characterisation facility (UFCF) is being considered holistically with the PSR for the host facility. This will take time, and the UFCF safety case is not now expected to come to ONR until late summer 2014. However comments already raised by ONR specialist assessors are being factored into the safety case preparation.

Conclusion of Intervention

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

ONR will follow up DSRL's response to the electrical power failure on a later visit.