Office for Nuclear Regulation

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Hinkley Point C - Routine compliance inspection of Licence Condition 19

Executive summary

Purpose of Intervention

In accordance with the Office for Nuclear Regulation’s (ONR’s) Hinkley Point C (HPC) Construction inspection plan, ONR performs a series of planned compliance inspections of identified licence conditions, to ensure that New Nuclear Build Generation Company (HPC) Ltd (NNB GenCo), is proportionately and adequately developing and implementing its licence compliance arrangements commensurate to the current stage of the project.

This intervention comprised a routine licence condition inspection carried out to assess NNB GenCo’s compliance with licence condition 19: construction or installation of new plant with respect to non-conformances arising during on-going construction activities. This intervention follows on from the previous intervention detailed in ONR-NR-IR-18-007 (TRIM 2018/221547).

ONR also undertook routine information gathering to inform ONR’s construction assurance permissioning assessment. The intervention was not awarded an inspection rating.

Interventions Carried Out by ONR

LC19 requires that “Where the licensee proposes to construct or install any new plant which may affect safety the licensee shall make and implement adequate arrangements to control the construction or installation.” The focus of this LC19 intervention was the adequacy of NNB GenCo’s non-conformance processes in relation to the on-going construction activities.

The following guidance was used:

Explanation of Judgement if Safety System Not Judged to be Adequate

This was not a system-based inspection

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

LC19 – Construction or installation of new plant (non-conformances)

NNB GenCo has made significant improvements to its management of both non-conformance reports and field change requests, with evidence of improving performance in a number of areas. Whilst these improvements have been beneficial to the management of site in its current configuration, continued focus will be required to ensure sustained improvement that is scalable to address the work demand following NIC permissioning.

Whilst the site is currently operating with what NNB GenCo presents as an adequate resource, there are continuing resourcing issues related to the site interface with the surveillance team, site-engineering team, the TMA team and Internal Assurance teams.

Conclusion of Intervention

The intervention was a useful fact finding exercise with significant information presented in a short period of time. This has enabled ONR to identify areas for focus in upcoming site inspections. ONR noted significant progress has been made since first nuclear safety concrete regarding management of non-conformances.