Office for Nuclear Regulation

Hinkley Point C - ONR inspection of NNB GenCo’s conduct of supply chain surveillance

Executive summary

Purpose of Intervention

NNB GenCo awarded the Main Civil Works (MCW) Contract to a joint venture between ­Bouygues and Lang O’Rourke (BYLOR). The MCW Contract HK2201 is the provision of the structures and facilities to house the plant and equipment necessary for the UK EPR nuclear installation.

The MCW contractor, BYLOR, is responsible for supplying various nuclear safety related components and items that are to be embedded within the reinforced concrete structures.  In addition to the concrete reinforcement, these embedded items are typically: - supports or attachments for equipment and services; components of embedded mechanical services and pipework; the main reactor building containment liner and liner components for embedded tanks and pools within the reactor building.  Under the terms of the MCW contract BYLOR is responsible for the supply of many, if not all, of these embedded items.

At an intervention planning and kick off meeting held on 1st February 2018 ONR informed NNB GenCo that ONR would inspect NNB GenCo’s implementation of its intelligent customer policy with respect to the MCW Contract.  Specifically, ONR’s inspections would examine the effectiveness of NNB GenCo’s application of the policy to the control of the supply and installation of nuclear safety related embedded items and components supplied as part of BYLOR’s MCW contract.

The intervention approach was agreed at the kick off meeting with NNB GenCo.  The Intervention would be carried out in three parts:

This was the first of the three, planned, cross cutting ONR interventions which would be carried out to judge the adequacy of NNB GenCo’s supply chain controls with regards to the supply of RPE Pipework which will be embedded in concrete (see ONR’s Intervention Plan for the Regulation of the Hinkley Point C New Nuclear Build Project 2018/19.

Boccard were selected by ONR as they had already commenced work on the fabrication of safety classified, double walled, stainless steel RPE pipework, and also because NNB GenCo were scheduled to conduct assessment of Boccard, which ONR could observe.

The purpose of this part of the ONR interventions was for ONR to assess how NNB GenCo carried out its assessment of Boccard and BYLOR’s supply chain management, and how it contributed to NNB GenCo meeting its’ Intelligent Customer requirements.  

Interventions Carried Out by ONR

I accompanied an NNB GenCo Supplier Surveillance Team on their commercial assurance inspection of Boccard.  Boccard had been contracted by BYLOR to supply safety related RPE Pipework which will be embedded in concrete. 

I assessed the Surveillance Team’s performance against the applicable parts of the following regulatory requirements and guides:

And also NNB GenCo arrangements:

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

The Assessment Team had carried out a thorough and effective assessment of Boccard Portugal which met ONR’s expectations and NNB GenCo’s arrangements (see Section 1.2).  The assessment supported NNB GenCo’s implementation of its Intelligent Customer Policy.

From the limited inspections that I was able to carry out I considered Boccard Portugal’s facility, capability and quality systems to be adequate for the pre-fabrication of the RPE Pipework.

I highlighted some areas that I intended to investigate further at the ONR Interventions at Bristol on 2nd and 3rd May 2018, namely: that the learning from the issues surrounding hot tensile testing at AREVA had not been passed on to Boccard and also the challenges that Boccard Portugal face as their workload ramps up with when they start working on the MEH contract as part of the Boccard/ Cavendish Nuclear Joint Venture.

Conclusion of Intervention

Based on my observations and findings I concluded that an ONR Inspection rating of Green was appropriate for this inspection of supply chain surveillance.