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

N/A

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.