Office for Nuclear Regulation

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LC36 Compliance Inspection, Annual Review of Safety and ONR Board Visit

Executive summary

Purpose of intervention

The purpose of this intervention was to undertake a licence condition compliance inspection at EDF Nuclear Generation Limited’s (NGL’s) Heysham 1 power station in line with the planned inspection programme contained in the Heysham 1 Integrated Intervention Strategy (IIS) for 2014/15.

The inspection was undertaken by the nominated ONR Site Inspector and leadership and management of safety technical specialist.

The ONR superintending inspector for the civil nuclear operating reactors and the nominated site inspector also attended the annual review of safety.

In addition the ONR board and Chief Inspector also visited the Heysham 1 power station for a plant tour and discussion on station activities including the recent boiler spine work.

Interventions Carried Out by ONR

The key intervention undertaken by ONR was a Licence Condition 36 compliance inspection which targeted the nuclear baseline and management of change process.

The annual review of safety was a routine meeting during which details were provided of the Station’s performance over the previous year, as well as a look forward at future operations.

Explanation of Judgement if Safety System Not Judged to be Adequate

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

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

I noted that the previous good progress with LC36 had stalled and that the station is not maintaining the nuclear baseline as a living document and is therefore failing to meet the standards set out in relevant good practice and the company procedures.  In addition a number of improvements were identified for the management of change process including the maintenance of the management of change register.  As a result I have raised an issue on the ONR issues database requiring a programme by 31 January 2015 with appropriate timescales for the station to address these shortfalls. Given these shortfalls I have judged compliance with LC36 to be below standard with an IIS rating of 4.

In respect of the annual review of safety, the members of ONR present were satisfied that a comprehensive review of safety had been carried out by Station.  The station staff that presented at the meeting were well prepared and knowledgeable of the subject matter they were presenting.  In particular ONR acknowledged the significant amount of work that had been undertaken safely during the boiler spine work. 

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

Conclusion of Intervention

From the evidence gathered during this intervention, I do not consider there to be any matters that have the potential to impact significantly on nuclear safety.   Notwithstanding this, an issue have been raised on the station where compliance with Licence Condition 36 was deemed to below the expected standard.  This issue will be pursued as part of normal business by the site inspector.  At present, no additional regulatory action is needed over and above the planned interventions of Heysham 1 power station as set out in the Integrated Intervention Strategy, which will continue as planned.