Office for Nuclear Regulation

Hinkley Point C – Inspection ID: 52649

Date(s) of inspection

  • October 2023

Executive summary

Aim of inspection

The aim of the inspection was to inspect NNB Generation Company (HPC) Ltd’s (NNB GenCo) arrangements for compliance with Licence Condition 19 (LC19) – construction or installation of new plant, in relation to civil engineering construction assurance. LC19 requires that where the licensee proposes to construct or install any new plant, which may affect safety, the licensee makes and implements adequate arrangements to control the construction or installation.

The objective of the inspection was to obtain evidence in relation to the adequacy of NNB GenCo’s arrangements for the control of the construction of the Unit 1 and Unit 2 reactor buildings (HR). The particular focus of the inspection was on the implementation of arrangements to ensure conformant construction of civil engineering elements, in accordance with the design intent and safety case.

Subject(s) of inspection

  • LC19 – Construction or installation of new plant – Rating: Green

Key findings, inspector’s opinions and reasons for judgement made

The evidence sampled provided confidence that the implementation of arrangements for civil engineering construction of Unit 1 and Unit 2 reactor buildings (HR) were adequately controlled. Furthermore, that where sampled, construction of civil engineering elements was found to align with the design intent and the safety case.

This inspection highlighted no significant regulatory issues. Only a small number of minor observations were made.

On the basis of the evidence sampled, I judge that NNB GenCo has implemented corporate arrangements in compliance with LC19 (construction or installation of new plant). In relation to the specific areas sampled, I judge that NNB GenCo’s implementation of arrangements for civil engineering construction of Unit 1 and Unit 2 reactor buildings (HR) were adequately controlled.

I also judge that the civil engineering contractor and sub-contractors arrangements in relation to construction of the nuclear safety significant reactor buildings are being implemented and are aligned with relevant good practice. Overall, I was satisfied with the adequacy of NNB GenCo’s ongoing arrangements for controlling the construction of the reactor buildings at HPC.

Conclusion

On the basis of the evidence sampled, and in recognition of progress to date, I was satisfied that the arrangements in place comply with LC19. Upon consideration of the ONR guidance in relation to inspection ratings, I judge that a rating of Green (no formal action) is appropriate.