Office for Nuclear Regulation

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AWE -  LC21 planned inspection  

Executive summary

Purpose of Intervention

The purpose of this intervention was to consider licence compliance in terms of licence condition 21, Commissioning. The interventions were carried out on the Mensa project at AWE Burghfield site. 

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

The intervention is part of an agreed series of interventions covered under the ONR intervention strategy 2018/2019. The intervention rating is identified within the report.

Interventions Carried Out by ONR

The following interventions were carried out at the Mensa Project site:

The proposed agenda was agreed for the inspection:

Explanation of Judgement if Safety System Not Judged to be Adequate

Not applicable

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

It was identified that a tiered set of commissioning strategy and arrangement documents are in place and had been updated to support the transition into the new contract organisation. Evidence was provided that show adequate compliance with the arrangements.

The inspectors considered the Costain staff to be open, knowledgeable and able to anticipate and address most queries as they arose. They were able to identify and produce requested documentation, and displayed a ready and thorough awareness of ongoing work activities, current issues and status of progress.

During the construction site visit, while minor housekeeping observations were noted, the site was felt to be well managed from a safety perspective. Whilst the safety induction prior to site entry was felt to be at an appropriate level, the PLOD and Hazard sign in was felt to be too detailed for visiting the site. The main construction contractor has transitioned from Jacobs to Costain and arrangements have been adjusted to align with the new structure. In assessing the activities, it was identified that the licensee and contractor were operating in compliance with their arrangements.

Conclusion of Intervention

Licence Condition 21: In relation to the Mensa LC21 compliance inspection, I established that the commissioning activities are progressing with a mechanical and electrical focus. The activities include factory acceptance testing and as construction progresses. This will increase the onsite commissioning activities going forward.

In relation to the Mensa LC21 compliance inspections, I considered that Green rating was appropriate. No further regulatory action is required.