Office for Nuclear Regulation

Dungeness B - LC7 and LC36 compliance inspections

Executive summary

Purpose of Intervention

The purpose of this intervention was to undertake licence condition (LC) compliance inspections of EDF Energy Nuclear Generation Ltd.’s (NGL’s) Dungeness  B Power Station. This was undertaken as part of the planned intervention strategy for the Operating Facilities Division (OFD) of the Office for Nuclear Regulation (ONR).

I carried out the intervention as nominated site inspector, supported by an ONR project inspector.

The ONR Project Inspector also held an update meeting for reactor 22 current periodic shutdown.

Interventions Carried Out by ONR

I, the nominated site inspector performed an inspection to evaluate NGL’s compliance with the following nuclear site licence conditions (LCs), which are applicable provisions of the Energy Act 2013:

Whilst on site, I also undertook the following engagement activities with;

The intervention was performed in line with ONR's guidance requirements (as described in our technical inspection guides) in the areas inspected.

Explanation of Judgement if Safety System Not Judged to be Adequate

Not applicable – no system based inspections were completed during this intervention.

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

For LC7, I observed the licensee’s daily screening meetings throughout the duration of my station visit. I sampled the licensee’s arrangements for screening of events, the sentencing of events and the quality of investigations that were undertaken. I also sample the subsequent actions that were raised from the investigations for their timeliness of completion and sampled the deferral process in extending an action completion date. I also sample the station’s organisational learning processes including self-assessments and independent evaluation.    Overall, I am satisfied from the sample inspected that the licensee’s arrangements and their implementation in compliance with LC7 are suitable and sufficient and that an IIS rating of green against LC7 is merited.

For LC36, I observed the licensee’s management of change steering group meeting, sampled the licensee’s baseline statement including management of change assessments and the control of their implementation, the management of change register, risk assessments and the station’s baseline statement database.  I also observe the station’s quarterly management of change steering group meeting. Overall I am satisfied that the licensee arrangements and their implementation in compliance with LC36 are suitable and sufficient and that an IIS rating of green against LC36 is merited.

I also held routine discussions with the station’s plant manager, the technical safety support manager and the internal regulator INA. The ONR project inspector also held routine discussions with the Outage Group Head and Outage Co-ordinator regarding the return to service programme and key activities for both plant and safety case for Reactors 22 and 21.

Conclusion of Intervention

For the LC 7 and 36 compliance inspections I have rated them Green, no formal action. There were no findings from this inspection that could significantly undermine nuclear safety.  At present, no additional regulatory action is needed in this instance  over and above the planned interventions of DNB power station as set out in the IIS for 2018 -19.