Office for Nuclear Regulation

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Planned Licence Compliance inspection - LC7 - Sellafield - Special Nuclear Materials OU (PP1)

Executive summary

Purpose of Intervention

The Office for Nuclear Regulation (ONR) undertakes all regulatory interaction with the Sellafield Site licensee (Sellafield Limited) (SL) against a strategy defined by the ONR Sellafield, Decommissioning, Fuel and Waste (SDFW) Division. In accordance with that strategy, a Licence Condition (LC) compliance inspection of the Special Nuclear Materials (SNM) Operating Unit was carried out, as planned in April 2018.

The purpose of this planned inspection was for ONR to determine the adequacy of implementation of the licensee’s formal arrangements for compliance with LC7 (Incidents on the site). For the inspection, I focused on the evidence for compliance within both Special Nuclear Materials – North (SNM(N)) and South (SNM(S)) as the plants control a significant hazard on the site and it is important that the licensee is capable of minimising the likelihood of events reoccurring, as well as maximising learning from any events that do occur.

Interventions Carried Out by ONR

On 24 April 2018, I carried out a one day, on site LC7 compliance inspection within the SNM Operating Unit. The intervention comprised of discussions with SL personnel and a review of SL records, documents and processes.

LC7 requires the licensee to make and implement adequate arrangements for the notification, recording, investigation and reporting of such incidents occurring on the site. The following ONR guidance was used:

Explanation of Judgement if Safety System Not Judged to be Adequate

This was not a system based inspection; therefore no judgement has been made on the adequacy of the implementation of any part of the safety case.

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

During my inspection, I sampled evidence associated with the SNM Operating Unit’s compliance with the SL corporate arrangements for compliance with LC7.

I sampled Condition Reports to confirm that they were appropriately sentenced and investigated; and that suitable corrective actions were raised. I sampled evidence to demonstrate that corrective actions were implemented and their effectiveness reviewed.

I found evidence that Metric dashboards are being used effectively to assist management of events, investigations and the implementation of corrective actions.

In my opinion there was clear evidence that the SNM Operating Unit has continued to embed improvements in its application of SL’s corporate arrangements for LC7 since the last inspection in 2016, which was awarded an Amber (seek improvement) inspection rating.

Conclusion of Intervention

Based on the evidence sampled during this inspection, I consider that SL has effectively implemented its arrangements for compliance with LC7. I therefore judge an inspection rating of Green (no formal action) is appropriate for compliance against LC7 (incidents on the site).