Office for Nuclear Regulation

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Compliance inspection covering LC 22 (Modification or experiment on existing plant)

Executive summary

Purpose of Intervention

In accordance with the Office for Nuclear Regulation’s (ONR’s) Sellafield Strategy, each year ONR performs a series of planned compliance inspections of selected licence conditions, targeted at those facilities with significant importance to nuclear safety.

One such licence condition inspection was performed to assess the Special Nuclear Materials Value Stream compliance with Sellafield Ltd’s (SL) corporate arrangements for Licence Condition (LC) 22 – modification or experiment on existing plant.

Interventions Carried Out by ONR

I carried out a planned compliance inspection against Licence Condition 22. This comprised discussions with SL personnel, and reviews of SL records, documents and processes.

Explanation of Judgement if Safety System Not Judged to be Adequate

N/A as this was not a System Based Inspection.

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

From the sample inspected I found that SNM have been applying the governance arrangements and appropriately categorising modifications. SNM demonstrated how they are effectively controlling live and overdue modifications, and are continuing to reduce the number of overdue modifications.  From the evidence sampled, SNM are adequately implementing their corporate arrangements to control Programmable Electronic Software modifications.

Conclusion of Intervention

From the evidence sampled during the inspection, I consider that SL has effectively implemented its arrangements for compliance with LC 22 across SNM (North and South) and I have assigned an inspection rating of Green (no formal action) to be appropriate for compliance against LC 22; modification or experiment on existing plant.