Office for Nuclear Regulation

Hinkley Point C - BYLOR suppliers intervention

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.

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 was carried out in three parts:

I carried out the Part 1 intervention on 5th April 2018 at Boccard Portugal, and I was generally satisfied with the control of work.

This intervention covered Parts 2 and 3 of the planned, cross cutting ONR interventions.  The purposes of these parts were:

Interventions Carried Out by ONR

The ONR Team carried out their interventions of BYLOR and NNB GenCo in accordance with an agreed Intervention Plan, against the applicable parts of the relevant regulatory requirements and guides, e.g.::

And also NNB GenCo arrangements:

Key Findings

The objectives of the intervention set out in the Intervention Plan were met.

The following positive points were noted:

ONR identified a number of shortfalls relating to  the adequacy of NNB GenCo’s supply chain and intelligent customer control of the embedded items being procured by BYLOR:

Inspector's Opinions and Reasons for Judgements Made and Conclusion of Intervention

The objectives of the intervention set out in the Intervention Plan were met.

Although the noted shortfalls had not, as far as I could ascertain, resulted in any issue to date that would impact on safety it was still appropriate that I rate NNB GenCo as Amber against the requirements of LC17 for their control of the supply of embedded safety related items by their Main Civils Contractor BYLOR JV based on the aggregation of the noted shortfalls.

I detailed these findings and my conclusions to NNB GenCo at the feed-back sessions on 2nd and 17th May 2018.  Subsequent correspondence has provided clarity in a number of areas and some previously reported findings have been amended.