Office for Nuclear Regulation

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Dungeness A System Compliance Inspection

Executive summary

Purpose of intervention

This report covers a planned visit to Magnox Ltd’s Dungeness A licensed site, undertaken in pursuance of ONR’s compliance inspection plan.

Interventions Carried Out by ONR

During this intervention, I carried out a system compliance inspection on essential  electrical supplies against the following licence conditions:

Whilst on site I held meetings with the licensee to discuss a number of routine matters.

Two inspectors from HSE’s Construction Division inspected the site during my visit, looking at compliance with the Construction, Design and Management Regulations and asbestos stripping. 

Explanation of Judgement if Safety System Not Judged to be Adequate

The safety system inspected was judged to be adequate.

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

During this inspection, I reviewed the licensee’s safety case for essential electrical supplies.  I consider that the licensee has considered all plant containing radioactive materials and has demonstrated how safety can be maintained during a power failure.

I found evidence of clear maintenance and operating procedures that were capable of being understood by operators.

I reviewed the training requirements for persons who operate the essential electrical supplies. Resulting from this inspection, the licensee has agreed to make improvements to training records.

The maintenance arrangements for the essential electrical supplies were reviewed.  Whilst much of the essential electrical supplies is new and may not yet require maintenance, a number of assets do not appear to have been identified for maintenance. The licensee has agreed to make improvements to its maintenance schedule.

Based on the evidence gathered during this inspection, I consider that the licensee has made and implemented adequate arrangements to ensure the safety of essential electrical supplies and the plant that it supplies.

Conclusion of Intervention

From the evidence gathered during this intervention, I conclude that there are no matters that may impact significantly on nuclear safety. However a number of improvements  have been identified that the licensee has agreed to implement.