Office for Nuclear Regulation

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University of Bristol, Level 4 Meeting and Inspection of AGR graphite core shaker table test rig

Executive summary

Purpose of intervention

The Office for Nuclear Regulation (ONR) holds regular meetings with EdF Energy Nuclear Generation Limited (NGL) as part of the intervention strategy on Advanced Gas Reactor (AGR) graphite cores. The meetings allow ONR to inspect aspects of safety cases, monitor developments and informs ONR of the licensee's intentions. The level four meeting on 10 June 2014 was held at the University of Bristol's seismic shaker table facility to allow NGL to present a review of recent work and an overview of future work associated with AGR graphite core physical modelling programme.

Purpose of Intervention

The planned meeting was held to enable NGL to:

Explanation of Judgement if Safety System Not Judged to be Adequate

No safety system was judged inadequate.

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

Discussions at the meeting were open and were in accord with the Regulatory Nuclear Interface Protocol (RNIP).

We were supportive of the shaker table programme, commended NGL, University of Bristol and Atkins on the high standard of the presentations and the inclusion of a test programme learning cycle.

One issue was incorporated into an existing issue on the ONR Civil Nuclear Reactor Programme issues database. This was for NGL to provide evidence that the physical modelling of the core restraint system in the seismic shaker table test programme is conservative with respect to that of the AGR reactor core.

Conclusion of Intervention

The meeting fulfilled the purpose of the intervention.