Office for Nuclear Regulation

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Internal Hazards inspection for the Hinkley Point B Reactor 3 outage

Executive summary

Purpose of Intervention

The purpose of this intervention was to undertake an Internal Hazards compliance inspection at EDF Energy Nuclear Generation Limited (NGL) Hinkley Point B Power Station (HPB) during the Reactor (R)3 periodic shutdown, in line with the inspection programme contained in the HPB Integrated Intervention Strategy (IIS).

Interventions Carried Out by ONR

We undertook an inspection and assessment of the implementation of internal hazards arrangements for the outage at HPB.  This was achieved by reviewing the arrangements in place for identifying and minimising any nuclear safety impacts that may arise from internal hazards during outage activities.

The inspection sample targeted some of the key internal hazards that may arise during outage activities (i.e. fire, dropped loads and impacts).  We also sampled the training provided to contractors to ensure internal hazards are effectively managed during the outage. 

Explanation of Judgement if Safety System Not Judged to be Adequate

N/A

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

Based on the discussions, explanations and the sample inspected, we were satisfied that there were no significant shortfalls identified with the internal hazards arrangements in relation to the planned outage activities; therefore a green inspection rating was awarded.  However we recommended that the lifting arrangements would benefit from review to confirm they are sufficiently robust to ensure hazards arising from lifting operations adequately consider the potential to impact high integrity pipework and welds. We did not consider that this recommendation had any immediate impact on operations and hence did not impact on the rating of the inspection. We will monitor progress through normal regulatory business.

Conclusion of Intervention

From the sample inspected, it is judged that the internal hazard arrangements for the HPB R3 periodic shutdown, met the required standard, therefore a ‘Green’ rating was awarded against Licence Condition 14 – Safety Documentation.  Based on these targeted interventions there were no internal hazard issues identified that would impact on restart.

From the evidence gathered during these interventions, there were no significant shortfalls identified with the internal hazards arrangements.  However, we recommended that the lifting arrangements would benefit from review to ensure they are sufficiently robust to ensure hazards arising from lifting operations adequately consider the potential to impact high integrity pipework and welds.