Office for Nuclear Regulation

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Heysham 2 Power Station - Control and Supervision of Operations and Maintenance - Theme 1 Intervention

Executive summary

Purpose of Intervention

This was a planned inspection at EdF Energy Nuclear Generation Ltd's (NGL's) Heysham 2 Power Station, undertaken as part of the planned intervention strategy for the Operating Facilities Division (OFD) of the Office for Nuclear Regulation (ONR).

The work was carried out in-line with the inspection programme contained in the Heysham 2 Integrated Intervention Strategy (IIS).

As part of the inspection, a team of three Organisation for Economic Cooperation and Development (OECD) Working Group on Inspection Practices (WGIP) international observers observed the ONR inspection in order to determine any good practices, differences or improvements in inspection methods. This is a normal practice of observations of OECD member states in order to improve nuclear regulatory inspection practices. Their findings will be shared with regulators from member states across the world.

Interventions Carried Out by ONR

During this intervention, the following key activities were undertaken:

Explanation of Judgement if Safety System Not Judged to be Adequate

No system based inspection was undertaken, hence not applicable.

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

We evaluated compliance against the following site licence conditions during the themed inspection:

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

The themed inspection examined compliance against LC12, LC23, LC24, LC25, LC26, LC27, LC28 and MHSW Reg 5. Overall, based on the evidence sampled, inspectors judged that legal requirements were met. We observed a number of work activities, examined management arrangements and sampled key documentation covering plant status control, work planning and work execution. In all cases the level of control and supervision was commensurate with the safety significance of the associated task. Two minor non compliances were identified for which two regulatory issues have been raised. ONR has assigned a rating of Green against the each of the legal requirements inspected.

OECD WGIP Findings

The OECD WGIP observers, nuclear safety inspectors from the Czech Republic, Germany and Japan, found the new ONR themed inspection practice interesting and complemented ONR on their inspection guidance documentation. A formal report will be written in due course which will include any learning for ONR. The report will be shared with OECD member states across the world.