Office for Nuclear Regulation

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Heysham 2 Power Station – Reactor 7 Outage Compliance Inspection of LC17 and LC22 and R7 Mid Outage Review Meeting

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) Heysham 2 power station in line with the planned inspection programme contained in the Heysham 2 Integrated Intervention Strategy (IIS).

Interventions Carried Out by ONR

This intervention included compliance inspections against the following Licence Conditions (LC):

The inspection undertaken utilised ONR guidance documents, NS-INSP-GD-017 and NS-INSP-GD-022, which require inspectors undertaking compliance inspections against these LCs to consider both the arrangements that are in place together with their associated implementation.

The intervention was undertaken as a planned joint inspection with a Human Factors Specialist Inspector. 

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

The following areas were included as part of the LC17 inspection:

From an LC17 perspective, based on the evidence sampled during this inspection, I consider the arrangements and implementation were, on balance, to an adequate standard and as a result I have rated this element of my inspection through the IIS as 3 (adequate).

The LC22 inspection identified shortfalls associated with project management arrangements specifically with document control and approval.  NGL recognised and agreed with the shortfalls and instigated a review of the other project work being performed as part of the statutory outage.  The review found further gaps in compliance and since the inspection, NGL has provided evidence confirming that they have now addressed the gaps and brought themselves back into compliance with the arrangements.   

Further to the findings, NGL are performing an investigation into the events surrounding the non-compliance and I have requested details of the outcome of the investigation, which I will consider as part of my future interventions within this area.  An ONR Issue has been raised for NGL to provide the outcome of their investigation into compliance with their project arrangements.

From an LC22 perspective, based on the evidence sampled during this inspection I consider the arrangements to have been implemented to a standard that falls below my expectations and hence I have rated this element of my inspection an IIS rating of 4 (below standard).

I also attended the Mid Outage Review Meeting as part of this intervention.  The purpose of the meeting was to review progress to date with regard to the maintenance being performed on the unit shutdown as part of its’ three yearly statutory shutdown.  No significant issues or threats to the programme were identified during the meeting.

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

Overall I considered that the arrangements and their associated implementation for LC17 met the requirements of ONR guidance and was rated through the IIS as 3 (adequate).  I consider that implementation of the project arrangements under LC22 fell below standard in this area and as a result I have rated this element of my inspection through the IIS as 4 (below standard).

There are no findings from this inspection that could significantly undermine nuclear safety and no change to the planned interventions and inspections of Heysham 2.