Office for Nuclear Regulation

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Planned intervention at the Devonport Royal Dockyard Limited Licensed Site

Executive summary

Purpose of intervention

This intervention at the Devonport Royal Dockyard Limited Licensed Site was undertaken as part of the 2015/16 intervention plan and propulsion sub-programme strategy.

Interventions Carried Out by ONR

The main purpose of this visit was to: attend regulatory update meetings, discuss progress on the nuclear safety improvement programme (NSIP), attend the Level 2 RIF, meet the safety representatives and conduct a follow-up the inspection in respect of closure of Improvement Notice (IN) I/2014/ONR/DMM/001.

Explanation of Judgement if Safety System Not Judged to be Adequate

A system based inspection was not carried out.

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

A final follow-up inspection related to the extant IN found that DRDL has addressed the remaining shortfall identified in the previous inspection.  Revised risk assessment arrangements now provide clear and comprehensive information to operators on the dose and contamination trigger levels for work in controlled areas, at which supervisors must seek the Health Physics Shift Manager’s advice before continuing with the task.  I judged that this resolves the remaining shortfall relating to information provided to the personnel carrying out the work and I therefore judge that DRDL has now remedied all of the contraventions identified in the IN by taking the measures necessary to comply with the attached schedule to it; I am satisfied that the IN is now closed-out.

A category B modification change request has been raised to justify fitting a temperature protection system on the cranes.  A second proposal has been raised relating to change of cooling water pumps with a different pump design.  ONR will indicate in due course whether it wishes to examine these proposals or they can be furnished to ONR for information only.

Delays to the submarine programme and operations in 5 Basin have resulted in some delays to NSIP related activities.  However, overall progress is being maintained against the commitments made for 2015/16.

Conclusion of Intervention

No shortfalls or issues were found which adversely affected nuclear safety or were judged to be of such regulatory concern as to require immediate action.  No regulatory issues were raised as a result of this inspection.