Office for Nuclear Regulation

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Hinkley Point 'B' Power Station - Planned Inspections

Executive summary

Purpose of intervention

This was a planned inspection at EDF Energy Nuclear Generation Ltd.'s (NGL's) Hinkley Point B power station, undertaken as part of the planned intervention strategy for the Civil Nuclear Reactor Programme (CNRP) of the Office for Nuclear Regulation (ONR).

The work was carried out in line with the planned inspection programme contained in the Hinkley Point B Integrated Intervention Strategy (IIS).

Interventions Carried Out by ONR

The ONR internal hazards inspector and I (the nominated site inspector) carried out a system based inspection of fire protection systems (both passive and active systems). The ONR Structural Integrity Inspector, the ONR Control & Instrumentation Inspector and I attended the outage intentions meeting (LC30: periodic shutdown). I carried out a compliance inspection with the nominated Environment Agency inspector on LC32 (accumulation of radioactive waste) and LC34 (leakage and escape of radioactive material and radioactive waste). I also participated in the visit of the Site Stakeholder Group to the stations, discussed conventional safety matters on the site, met with the internal regulator and held information gathering meetings with NGL.

The licence conditions were inspected against ONR's published guidance requirements (as described in our technical inspection guides).

Explanation of Judgement if Safety System Not Judged to be Adequate

The Fire Detection, Suppression, Barriers, Doors and Dampers were judged to meet the requirements of the safety case and were adequate.

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

The ONR internal hazards inspector and I carried out a system based inspection of fire protections systems (both active and passive) at Hinkley Point B power station and concluded that:

The ONR Structural Integrity Inspector, the ONR Control & Instrumentation Inspector and I attended the outage intentions meeting. For LC30 (periodic shutdown) we considered this to be a very useful meeting that provided significant detail on NGL plans for the outage and an opportunity for the site internal regulator, the Environment Agency and ONR to provide comment and challenge. We were satisfied that arrangements were in place to demonstrate compliance with LC30 and therefore assigned an IIS rating of - 2 (good) to this inspection.

The nominated Environment Agency inspector and I carried out an inspection of waste management procedures on the site:

I discussed industrial safety matters on the site and met with the site internal regulator to discuss recent events, ongoing inspections and future intervention topics. I participated in the Site Stakeholder Group visit to sites and held information gathering meetings with station staff on a range of topics including the recent failure of a section of Nitrogen pipework, the revision of Technical Specification 6.1.1 relating to the kerosene storage tanks, permissioning of the new Nitrogen system, the proposed extension to the Reactor 4 operating period and the new vaporiser auxiliary boiler plant.

Conclusion of Intervention

There are no findings from this inspection that could significantly undermine nuclear safety. No actions were raised during this inspection.