Office for Nuclear Regulation

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NNB GenCo Hinkley Point C MSC15 - Manufacturing Assurance - Manufacturing Activities

Executive summary

Purpose of Intervention

The purpose of the intervention was to examine the adequacy of NNB Generation Company (HPC) Limited’s (NNB GenCo) second tier manufacturer’s capabilities, including controls and processes, to manufacture components for the polar crane. The Office for Nuclear Regulation (ONR) sought to gain confidence in the project’s oversight, as well as ensuring that the fabrication of sub-assemblies will be adequate in terms of fulfilling the safety case requirements for the polar crane.

Interventions Carried Out by ONR

ONR carried out a Licence Condition (LC) 17 (Management systems) intervention related to the manufacture of the polar crane. LC17 requires that licensees establish and implement management systems which give due priority to safety.

This intervention took place at two manufacturers of components for the Hinkley Point C polar crane on the 26th and 28th of November 2019. The manufacturers were Breman Machinery in the Netherlands and Asturfeito in Spain. APCO Technologies, the tier one supplier of the polar crane and main contract holder, was in attendance with both manufacturers.

Explanation of Judgement if Safety System Not Judged to be Adequate

Not applicable.

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

The following was demonstrated during the intervention:

ONR examined NNB GenCo’s arrangements, through APCO Technologies and its two subcontractors, for the control of quality management systems, for supply chain management and for technical competence. ONR noted areas of good practice, specifically, that both manufacturers have in place good arrangements for the traceability of materials used in projects. The following minor shortfalls were identified, which will be followed up through routine ‘Nuclear Island’ engagements with NNB GenCo:

Conclusion of Intervention

ONR is satisfied that both Breman Machinery and Asturfeito appear to be capable fabricators of heavy engineering assemblies. Whilst a number of minor shortfalls were identified, ONR has sufficient confidence that the sub-assemblies fabricated should be adequate in terms of fulfilling the safety case requirements for the polar crane.

Based on the discussions, observations and evidence from NNB GenCo, APCO Technologies, Breman Machinery and Asturfeito, ONR judged that NNB GenCo’s implementation of its LC17 arrangements to be ‘Green’ (no formal action required) for both Breman Machinery and Asturfeito.