Office for Nuclear Regulation

Planned compliance inspection covering LC24 and LC36

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.

Two such licence condition inspections were carried out to assess Sellafield Ltd.’s (SL’s) compliance with Licence Condition (LC) 24 – Operating instructions and LC36 – Organisational capability in September 2018.

Interventions Carried Out by ONR

ONR inspectors carried out planned compliance inspections against licence conditions 24 and 36 at the Thermal Oxide Reprocessing Plant (Thorp) and the Oxide Fuel Storage Group (OFSG) at Sellafield.  

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 24 Inspection

From the inspection sample I found that for both Thorp & OFSG: (a) Operator Instructions were being reviewed and reformatted in a timely manner in accordance with corporate requirements, (b) Senior Management were using Learning from Experience and their own oversight/ inspection activities to evaluate the effectiveness of the Operator Instructions, and (c) where appropriate continuous improvement activities were being managed via ongoing Nuclear Professionalism Improvement Programmes.

LC 36 Inspection

From the inspection sample I found that Thorp and OFSG are effectively maintaining their nuclear baselines and using them as a basis to manage resources. I also found that they are raising, appropriately categorising and implementing Management of Organisational Changes in line with corporate requirements. From evidence sampled ONR also judged that Thorp are effectively managing Minimum Safety Manning Levels. Sellafield Ltd. also demonstrated that the organisational change associated with Thorp Post Operational Clean Out (POCO) is being managed in line with the corporate requirements.

Conclusion of Intervention

On the basis of the evidence gathered during the inspection, I judge that inspection ratings of GREEN – No formal action, are appropriate for compliance against both LCs. This is because I found SL to have adequately implemented its corporate arrangements for these LCs.