Office for Nuclear Regulation

Planned compliance inspection covering LC11and LC22

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 core licence conditions targeting those facilities with the potential to give rise to off-site effects to the public.

These planned, core licence condition inspections were carried out to assess Sellafield Ltd.’s (SL’s) compliance with licence condition (LC) 11 – emergency arrangements and licence condition (LC) 22 – modification or experiment on existing plant, at the Thermal Oxide Reprocessing Plant (THORP) at Sellafield and the Oxide Fuel Storage Group (OFSG).

Interventions Carried Out by ONR

I carried out a one day licence compliance inspection against Licence Condition 11 and a half day inspection against Licence Condition 22.

Explanation of Judgement if Safety System Not Judged to be Adequate

N/A as this was not a safety systems inspection.

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

LC 11 Inspection

From the inspection sample I have seen evidence that: Thorp and OFSG are maintaining local arrangements, they have a drill and exercise plan that has been developed in a structured manner and that is being implemented in a timely manner, opportunities for learning are being appropriately identified both via the post exercise reports and the annual report, and an emergency management dashboard appears to be being used as an effective way of managing and governing. During an interview a Thorp Incident Controller demonstrated an adequate knowledge of the hazards and associated emergency arrangements for the facility.

As recognised by Thorp, they need to continue to plan and prepare for the implications on LC 11 arrangements of moving into Post Operational Clean Out (POCO).

LC 22 Inspection

I found SL to be broadly compliant with its corporate arrangements, and that it has continued to deliver on the improvements identified in last year’s LC 22 inspection. In particular evidence was seen that Thorp and OFSG have been categorising PMPs appropriately, they are effectively controlling live and overdue PMPs, and are continuing to have a low number of overdue PMPs.

Conclusion of Intervention

On the basis of the evidence gathered during the inspection, I judge that inspection ratings of GREEN are appropriate for compliance against both LC 11 (Emergency Arrangements) and LC 22 (Modification or Experiment on Existing Plant). This is because I found SL to have effectively implemented its corporate arrangements for these LCs.