Office for Nuclear Regulation

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Chapelcross - Planned Licence Condition compliance inspection

Executive summary

Purpose of Intervention

This inspection was one of a series of planned Licence Condition (LC) inspections for 2019/20, which are informed by the ONR Decommissioning Fuel and Waste (DFW) sub-division strategy. 

Interventions Carried Out by ONR

This inspection examined the adequacy of ML’s arrangements on the Chapelcross site for compliance with: LC 22 (modification or experiment on existing plant); LC 27 (safety mechanisms devices and circuits) and; LC28 (examination, inspection, maintenance and testing). We also held discussions with the site safety representatives. 

For LC 22, we inspected the licensee’s arrangements for the control of modifications and experiments to ensure that any benefits of updating plant, processes and operations etc. are not jeopardised by the modification activity or the modification itself being inadequately conceived or executed.  For LC27, we inspected arrangements for the systematic identification and classification of Safety Mechanisms, Devices and Circuits (SMDCs). For LC28 we inspected arrangements for the regular and systematic examination, inspection, maintenance and testing of all plant which may affect safety.

Explanation of Judgement if Safety System Not Judged to be Adequate

Not applicable.

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

Based on the evidence examined it is my judgement that ML is effectively implementing arrangements for complying with LC 22, 27 and 28 at Chapelcross.  I identified areas of good practice and some areas where ML could improve.

Conclusion of Intervention

I identified no matters that in my opinion could adversely affect nuclear safety. My findings were shared with and accepted by the licensee.