Office for Nuclear Regulation

This website uses non-intrusive cookies to improve your user experience. You can visit our cookie privacy page for more information.

Operational readiness Inspection for Reactor 2 Return to Service Under the Boiler Spine Safety Case

Executive summary

Purpose of intervention

This was an unplanned inspection against the EDF Nuclear Generation Limited’s (NGL’s) Heysham 1 Integrated Intervention Strategy (IIS) for 2014/15 as a result of the boiler spine emergent issue.

Interventions Carried Out by ONR

  I undertook an operational readiness inspection to determine if the station had implemented the requirements from the reduced temperature operation safety case following the boiler spine issue, to allow reactor 2 to return to service.

I also attended the routine Heysham Local Community Liaison Committee (LCLC).

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 targeted a number of areas as part of the operational readiness inspection relevant to the return to service safety case. These areas included reactor operations and operator training, safety documentation and procedures, maintenance and plant avai

lability. I judged that the operator training undertaken was suitable and sufficient but advised the station that all reactor operators should complete this training before undertaking reactor operational duty.  This was accepted by the station.

I confirmed that the key safety documentation and procedures were updated in light of the new safety case and formally issued.  I also reviewed the station maintenance and plant availability to confirm that the safety case requirements could be met.

The ONR quarterly report was presented to the LCLC and no questions were raised.

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

I judge that there are no significant operational issues outstanding that would prevent ONR granting Agreement for the return to service of Reactor 2 at Heysham 1.