Office for Nuclear Regulation

Hinkley Point C – Inspection ID: 22-010

  • Site: Hinkley Point C
  • IR number: 22-010
  • Date: May 2022
  • LC numbers: 19

Executive summary

Purpose of Intervention

The focus of the intervention was to sample the on-site fabrication processes produced by the licensee, how these are cascaded to the tier 1 contractors and there on to the sub-contractors.  The intervention also sampled the application of these processes on site, the general condition of fabrication activities on site and how the operatives are engaging with and applying written practices.

Interventions Carried Out by ONR

This inspection focused on the effectiveness of NNB’s implementation of its processes and controls in the area of fabrication.  Specifically, this intervention looked at the ongoing fabrication activities at site which have a significant impact on the safety of the ongoing work, and the safety and safe operations of the plant into the future.

Specific focus was put on the MEH installations including the Polar Crane brackets and welding and fabrication activities on site.

Explanation of Judgement if Safety System Not Judged to be Adequate

Not applicable.

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

The processes and controls for the fabrication of systems structures and components on site were presented in a cogent and coherent manner and the licensee was able to describe how these are being cascaded down to its supply chain. Discussions occurred within the intervention with the licensee’s contractors and subcontractors. These showed that the organisations sampled had adequate understanding of the reasons why fabrication of systems structures and components are of safety importance and why appropriate standards should be applied. The processes and procedures sampled relating to the control of fabrication, including welding consumables was adequate.

The site walk-down sampled areas where installation of plant was underway and where components were being laid up prior to installation on site.  Fabrication and installation activities sampled included the installation of polar crane brackets and tanks and liners. No areas of concern were identified, housekeeping standards were to an appropriate level and staff encountered on the walk-down demonstrated adequate understanding of the safety significance of the components sampled. I judge that the systems and processes used were sufficient for the current status of construction and installation activities.

Conclusion of Intervention

For the areas sampled, the licensee presented adequate processes and procedures for the management of onsite fabrication activities on the HPC site. The contractors sampled in this intervention showed adequate understanding of the processes and procedures being used for fabrication and demonstrated sufficient knowledge of the safety significance of the systems structures and components being fabricated.

Overall, based on the evidence observed, I judge that an inspection rating of Green (No Formal Action) is appropriate for this intervention. I will continue to monitor progress and adequacy of these matters through routine level 4 interactions.