Office for Nuclear Regulation

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Heysham 2 Power Station - Licence Condition Compliance Inspection

Executive summary

Purpose of intervention

The purpose of this intervention was to undertake Licence Condition (LC) compliance inspections 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 2016-17).

Interventions Carried Out by ONR

I, the ONR nominated site inspector, undertook compliance inspections against LC10 (Training) and LC12 (Duly authorised and suitably qualified and experienced persons). I was supported by two operational inspectors for LC28 (Examination, inspection, maintenance and testing) compliance inspection which focussed on corrosion under insulation (CUI) as part of a fleet wide corporate inspection. The inspections were based on sampling the implementation of the arrangements in place at the station against each licence condition.

This intervention also included a quarterly review of the Heysham 2 ONR issues raised by the nominated site inspector.

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

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

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

For LC10 the inspection examined the licensee's arrangements with respect to how the Station undertakes its simulator training I observed/sampled:

From my inspection of the arrangements, I consider them to be robust. In particular I noted several areas where the licensee had undertaken further activities with regards to ensuring feedback from candidates were used to identify further improvements. This was not a requirement of the licensee own arrangements thus demonstrated the stations commitment to continually improve the quality of simulator training.

My inspection in relation to LC10 has rated this element of the inspection as Green. This is on the basis that relevant good practice is being met and the processes being applied are mature and meet relevant standards.

For the LC12 compliance inspection I examined the licensee's arrangements with respect to those individuals undergoing simulator training and the instructors who are designated Duly authorised and suitably qualified and experienced persons (DAP), My sampled inspection was in the following areas:

From my inspection of the updated arrangements for the management of DAPs, I am satisfied that it has been adequately implemented. The records associated with DAP requirements were in place for instructor and candidates including the relevant training requirements.

From my inspection, I judged that the implementation of the LC12 arrangements warrants this element of the inspection as Green.

For LC28, we sampled a selection of systems which represent the vulnerable 1 and 2 systems under the Heysham 2 corrosion management implementation plan. We concentrated on systems which link to nuclear safety significance and also those that contain insulated pipework. This inspection formed part of a fleet wide intervention on corrosion under insulation. From sampling of the inspection, maintenance and testing arrangements of the diesel generator cooling external pipework, we deemed the current situation to be acceptable, noting the station is in the middle of a large recovery programme and that current existing arrangements are likely to change.

A plant tour was undertaken involving visiting several areas of the Station including the diesel roof plant, the nitrogen secondary shut down plant and lagged auxiliary steam pipework. There were no significant findings associated with the CUI plant walk down; however some minor deficiencies were noted (and subsequently captured under NGL's defect management arrangements) as well as a shortfall in arrangements in relation with the operation of two mobile elevated work platforms. This again was captured under the licensee's arrangements.

We judged that the implementation of the LC28 arrangements is adequate and have rated this element of the inspection as Green.

During my routine engagements I undertook a quarterly review of the ONR issues database and followed up the stations progress of condition reports raised by the station following ONR compliance and system based inspections. I did not identify any significant shortfalls or areas of significant concern such that they required elevation in relation to categorisation or further regulatory attention. I consider that NGL continues to address the current open issues at Heysham 2 in a satisfactory manner.

I held a brief meeting with the Heysham 2 Strategic Outage Manager who provided me with a high level brief of the medium term plan for Heysham 2. I was shown presentational slides identifying the investment plan, future outages, investment changes and a summary of key investments for 2017-18.

Conclusion of Intervention

Overall I consider that the arrangements and their associated implementation for LC10, LC12 and LC28 met with the required standards, and therefore rated them as Green.

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.