Office for Nuclear Regulation

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Heysham 2 - LC12 and LC22 Compliance inspection and ARoS

Executive summary

Purpose of Intervention

The purpose of this intervention was to undertake compliance inspection activities at EDF Energy Nuclear Generation Limited’s (NGL) Heysham 2 nuclear power station, in line with the ONR’s inspection programme contained in the Heysham 2 Integrated Intervention Strategy (IIS) for 2018/19.

Interventions Carried Out by ONR

I, Nominated Site Inspector for Heysham 2 undertook inspections to evaluate licensee’s compliance against the following Licence conditions (LC), which are applicable provisions of the Energy Act 2013;

Whilst on site, I also undertook the following regulatory activities;

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

Licence Condition 12 – Duly authorised and other suitably qualified experienced persons.

I inspected the licensee’s process for training, assessment and appointment of Duly Authorised Persons (DAPs). I also sampled the training records for a number of DAPs, reviewed the licensee’s self-assessment process held discussions with unit desk engineers, control room supervisors and a shift manager. I judge that all of these areas where sampled were adequate and the staff interviewed understand their roles and responsibilities and are competent. I fed back a minor inconsistency in relation to the demonstration of recorded evidence of assimilation of the training records for some DAPs who were appointed prior to the implementation of systematic approach to training processes at Heysham 2. I judged that a Green inspection rating was appropriate against LC12.

Licence Condition 22 – Modification or experiment on existing plant.

I sampled the licensee’s process for devising, approving and implementing EC’s from within the design engineering group. I also reviewed the fleet Maintain Design Integrity (MDI) highlight report and the accountability tool as implemented at Heysham 2. Further, I sampled the governance arrangements for urgent and temporary EC’s and Defeat of Interlocks within the fuel route. I identified a minor inconsistency in the criteria for independent approval of category 2 defeat of interlock proposals in the fuel route. I asked the licensee to consider independent approval for all category 2 DOI’s in the fuel route. I am broadly satisfied that the licensee’s arrangements meet with ONR’s expectations. I judged that a Green inspection rating was appropriate against LC22.

Annual Review of Safety

Along with a Superintending Inspector and a nominated site inspector from another operating reactors’ site, I attended the annual review of safety at Heysham 2. As part of the ARoS, Inspectors observed a senior management meeting, undertook a plant walkdown and met with senior managers and team leaders. ONR is content that;

No significant areas of concern in relation to nuclear safety or security were raised by ONR.

Conclusion of Intervention

There are no findings from this inspection that could significantly undermine nuclear safety.  At present, no additional regulatory action is needed over and above the planned interventions at the Heysham 2 Power Station.