Office for Nuclear Regulation

This website uses non-intrusive cookies to improve your user experience. You can visit our cookie privacy page for more information.

Torness - LC 22 Inspection

Executive summary

Purpose of intervention

The purpose of this intervention was to undertake a Licence Condition (LC) compliance inspection at EDF Energy Nuclear Generation Limited (NGL) Torness Power Station, in line with the inspection programme contained in the Torness integrated intervention strategy (IIS) for 2016/17. Specifically, this was part of a fleet-wide, corporate LC22 inspection, where any areas for improvement or recognised good practices, will be shared with Independent Nuclear Assurance at EDF Corporate Centre for action as necessary.

Interventions Carried Out by ONR

As part of the intervention, we inspected NGL’s LC22 arrangements for modifications or experiments on existing plant, in accordance with ONR guide NS-INSP-GD-022 Revision 3. We focused mainly on configuration control of plant in the process of being modified. This intervention was based upon an inspection of associated procedures and interrogation of various lists including open category 1, 2 and 3 lists of modifications, long term out of service plant, safety case anomalies and defeat of interlocks and interviews with station staff.

Explanation of Judgement if Safety System Not Judged to be Adequate

No safety system inspection was undertaken; hence this section is not applicable.

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

From our inspection of the arrangements for the control of a modification, focusing on configuration control of plant being modified, we noted sufficient checks and balances within the procedures, electronic modification form and the asset management system (AMS) to allow for adequate configuration control.

We sampled how all the open modifications on the station are controlled. This showed that a number of performance indicators are monitored, and routine review meetings are conducted. We noted that there were some long standing open modifications. We did note that a number of the oldest open modifications were master or replicant modifications, which are essentially repeat modifications. We were also informed that management are clear regarding areas for improvement.

The management of long term out of service plant was recognised as in need of improvement. This had been given an owner to drive improvements.

The station management of safety case anomalies appeared to be in good order.

There were no interlock defeats in force and the arrangements for managing interlock defeats  we considered  adequate.

Based on our inspection, we judged that overall, the implementation of the arrangements for LC22 reflects relevant good practice, and we have rated this intervention as Green.  

Conclusion of Intervention

Overall, we consider that the arrangements and their associated implementation for LC22 for the sample undertaken met legal requirements. We have therefore rated this inspection as Green.