Office for Nuclear Regulation

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Compliance inspections at AWE Aldermaston

Executive summary

Purpose of intervention

The purpose of this intervention was to undertake Licence Condition (LC) compliance inspections at Aldermaston in line with the planned inspection programme contained in the AWE Integrated Intervention Strategy and associated Intervention Plans. A reactive inspection was also undertaken due to an event on site.

Explanation of Judgement if Safety System Not Judged to be Adequate

During this intervention I carried out the following inspections/activities:

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

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

From the evidence sampled during this inspection, I judge that AWE’s arrangements to comply with the requirements of LC 35 is adequate in that they meet the majority of ONR’s expectations.  However, during the inspection, when looking at the LC35 interactions with respect to controlling change using AWE’s LC 22 (modification) arrangements a number of issues where found, with respect to LC 22.

From the evidence sampled during this inspection I judge that AWE’s arrangements to comply with the requirements of LC 32 and 34 are adequate in that they meet the majority of ONR’s expectations.  During the inspection I witnessed no significant shortfalls in the implementation of these arrangements so I consider them to have been implemented to an adequate standard. 

I engaged with AWE on its resolution of regulatory issues and continued engagement on both a facility and corporate level.

An intervention was carried out to make further enquires after ONR were notified that an electrical engineer had sustained an electric shock while carrying out works on site.  ONR work in this area is continuing.

Conclusion of Intervention

Based on the planned system based inspection undertaken against the requirements of LC 32, 34 and 35 I consider that the licensee has adequate arrangements to comply with the licence conditions, and is implementing the requirements of those arrangements, to an adequate standard.

I have recommended to the incoming Site Inspector and to the Weapons Sub-Programme LC22 Lead that an LC 22 inspection is carried out in the A! decommissioning facility or as part of a wider LC22 inspection.    

No conclusion on the electric shock intervention has been reached since this work is ongoing.