Office for Nuclear Regulation

Sizewell B - Reactive unplanned LC7 inspection

Executive summary

Purpose of Intervention

The purpose of this intervention was to undertake a reactive unplanned inspection of compliance with Licence Condition (LC) 7 (incidents on the site) at EDF Energy Nuclear Generation Limited’s (NGL) Sizewell B power station, in response to events that had been reported to ONR. 

Interventions Carried Out by ONR

The licensee’s processes for identifying and investigation faults, and for notifying ONR, were inspected using three examples:

Explanation of Judgement if Safety System Not Judged to be Adequate


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

Overall I am satisfied that my sample of the above incidents was investigated and reported appropriately by the licensee, based on the following observations:

Conclusion of Intervention

There are no findings from this intervention that undermine nuclear safety at this time.  Therefore, no additional regulatory action is needed over and above the planned interventions at for Sizewell B.