Office for Nuclear Regulation

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Planned Intervention to Undertake a LC32 Inspection with a Focus on ILW Filters and the Solid Radioactive Waste Management Facilities

Executive summary

Purpose of intervention

This report describes an inspection of EDF Energy Nuclear Generation Limited (NGL)'s Heysham 1 Power Station licensed site.

Interventions Carried Out by ONR

The intervention included undertaking planned compliance inspections against the following Licence Condition (LCs):

Explanation of Judgement if Safety System Not Judged to be Adequate

A system inspection was not undertaken.

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

The facilities for the management of solid radioactive waste have been improved significantly in terms of material condition and reducing operator burdens due to manual handling. The improved facilities facilitate effective sorting and segregation of radioactive waste, and are therefore well aligned with the various disposal routes that are available for solid radioactive waste generated as a result of reactor operation. It is noteworthy that significant volumes of radioactive waste have been disposed off over the last year in order to prepare the facilities for refurbishment.

A plan has been developed for managing filters presently stored on the Heysham 1 site. Implementing the plan will result in the disposal of any filters that are suitable for disposal as Low Level Waste (LLW) and improved storage arrangements for any filters that are Intermediate Level Waste (ILW). ONR will monitor the Licensee's progress against the implementation plan via normal regulatory interactions.

I judge a rating of 3 (adequate) appropriate against LC32.

The facilities for the management of solid radioactive waste have been improved in terms of providing storage conditions for drummed radioactive waste that will facilitate prevention of leakage and escape. A mobile drum racking system is in place that facilitates inspection of individual drums, the storage area floors have been repaired and the impermeable coating restored, the severity of a long standing leak of ground water into the drummed waste store has been significantly reduced and the limited water that still enters the store is being channelled away from stored drums.

The plans for managing filters stored on the Heysham 1 site when implemented will improve compliance with LC34 because all filters will be stored in a purpose built decay store whose design represents an improvement over the existing storage arrangements. ONR will monitor the Licensee's progress against the implementation plan via normal regulatory interactions.

I judge a rating of 3 (adequate) appropriate against LC34.

Conclusion of Intervention

From the evidence gathered during this intervention, no matters have been identified that are likely significantly impact on nuclear safety on the Heysham 1 site at this time.