Office for Nuclear Regulation

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SBI 29 – Buildings, Structures and Infrastructure

Executive summary

Purpose of Intervention

The purpose of this intervention was to carry out a system based inspection at EDF Energy Nuclear Generation Limited’s (NGL’s) Heysham 1 power station in line with the planned inspection programme contained in the Heysham 1 Integrated Intervention Strategy (IIS) for 2018/19. 

Interventions Carried Out by ONR

A civil engineering specialist inspector, assisted by the Heysham 1 nominated site inspector performed a system based inspection (SBI) of the Buildings, Structures and Infrastructure system to judge the system performance against its safety function.  Through examination of this system and associated sub-systems, we performed compliance inspections against the following Licence Conditions (LCs):

We considered that LC 34 (Leak and Escape of Radioactive Material and Radioactive Waste) was not applicable to the sampled system components.

The intervention was performed in line with ONR's guidance requirements (as described in our technical inspection guides) in the areas inspected.

Explanation of Judgement if Safety System Not Judged to be Adequate

From the areas sampled during this inspection, we judged that overall the Buildings, Structures and Infrastructure system met the requirements of the safety case.

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

With respect to the system based inspection the following judgements were made;

A single ONR level 4 issue has been raised to capture the actions identified in this intervention report.  Satisfactory close-out of the issue will be monitored by the ONR nominated site inspector as part of routine regulatory business.

Conclusion of Intervention

Following the system based inspection of the Buildings, Structures and Infrastructure system we judged that compliance with LC10, 23, 24, 27 and 28 met the expected standards and were rated as Green. Overall, we judged that the Buildings, Structures and Infrastructure system met the requirements of the safety case.

There were no findings from this inspection that could significantly undermine nuclear safety.  At present, no additional regulatory action is needed over and above the planned interventions of Heysham 1 power station as set out in the integrated intervention strategy, which will continue as planned.