Office for Nuclear Regulation

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RRMPOL planned inspection

Executive summary

Purpose of intervention

This was a planned inspection of the chemical plant at Rolls-Royce Marine Power Operations Ltd (RRMPOL) site, undertaken as part of a series of planned interventions for 2015/16.

Interventions Carried Out by ONR

A team of ONR inspectors carried out a System Based Inspection (SBI) of RRMPOL chemical plant’s criticality controls. The team consisted of the ONR nominated site inspector, criticality specialist, mechanical specialist, human factors specialist and fault analysis specialist. A representative of RRMPOL’s internal regulator accompanied and assisted the inspection.

This intervention was performed in line with ONR’s technical inspection guides in the areas inspected.  

Explanation of Judgement if Safety System Not Judged to be Adequate

The chemical plant criticality controls were judged to meet the requirements of the safety case.

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

The ONR team carried out a system based inspection of the chemical plant criticality controls and concluded that:

Conclusion of Intervention

Based upon evidence gathered during this inspection, we consider that the requirements of the safety case with regard to control of criticality have been adequately implemented on RRMPOL’s chemical plant.

There are no findings from this inspection that have raised any immediate concerns with regard to nuclear safety. We identified instances of staff training based upon local arrangements rather than formal site wide arrangements; although it was noted that RRMPOL is in the process of developing a site wide based training scheme. It was noted that the internal / external hazards part of the safety case was not fully implemented on-site at the time of this inspection; however, plans appeared to already be in place to address this issue. A number of areas for improvement were identified with regards to operating instructions and maintenance arrangements. These matters will be monitored by ONR’s nominated site inspector as part of routine regulatory interactions and licence condition compliance inspections during 2016/17.