Office for Nuclear Regulation

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Heysham 1- Planned intervention

Executive summary

Purpose of intervention

The purpose of this intervention was to undertake a Licence Condition (LC) compliance inspection at EDF Nuclear Generation Limited’s (NGL’s) Heysham 1 power station in line with the planned inspection programme contained in the Heysham 1 Integrated Intervention Strategy (IIS) for 2014/15. 

Interventions Carried Out by ONR

The key intervention undertaken was a licence compliance inspection of LC25, Operational records.

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

No significant issues were noted with the current electronic storage of the operational records, however, a number of improvements were identified with the historical records which are in a variety of forms; paper, computer discs, films, videos and radiographs.

Currently there is not a complete inventory of all the operational records required under LC25, their current condition and whether the current storage form will satisfy the storage period requirements under LC5 and LC6. NGL has been given action to address this shortfall.

NGL has recently identified one area unsuitable for the storage of the operational records being kept there. Whilst this has been rectified, ONR has requested that they carry out a review of all on site record storage areas, including those used by contractors, to ensure that they are fit for purpose and meet the requirements of the nuclear site licence for retention of such records.

Although condition monitoring of the operational records is being undertaken, this is not carried out in a routine, systematic way and in the absence of a formal method and procedure.  NGL has therefore been given an action to produce and implement formal procedures for condition monitoring taking cognisance of the company corporate procedures.  NGL are currently considering adopting the approach taken at Heysham 2 to address this shortfall.

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

Given the shortcomings identified above this intervention was rated as below standard and given an IIS rating of 4.  A number of formal actions have been raised on NGL, as discussed above, and placed on the ONR issues database.