Office for Nuclear Regulation

Chapelcross MAC & Cobalt Retrievals SBI; Site meetings

Executive summary

Purpose of Intervention

I carried out a System Based Inspection (SBI) as part of a series of planned inspections at the Magnox Ltd (ML) Chapelcross (CHX) decommissioning site during 2020/21.

Interventions Carried Out by ONR

I carried out an SBI on CHX’s implementation of their LC10, 21, 22, 23, 24, 27, 28 and 34 arrangements for MAC & Cobalt ILW retrieval operations during December 2020. ONR inspectors also held an update meeting with the CHX Safety Representatives.

Explanation of Judgement if Safety System Not Judged to be Adequate


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

From the documentation examined and the areas inspected, I found that CHX’s implementation of its LC 10, 21, 22, 23, 24, 27, 28, and 34 arrangements was adequate and that the MAC & Cobalt retrievals safety system adequately fulfils the requirements of the safety case.

Conclusion of Intervention

I judged that ML’s implementation of its LC10, 21, 22, 23, 24, 27, 28, and 34 arrangements for CHX MAC & Cobalt ILW retrievals as adequate in the areas inspected. I did not identify any significant regulatory concerns.