Office for Nuclear Regulation

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Planned interventions with LLWR relating to LLWR site operations undertaken as part of the planned ONR programme covered by ONR LLWR inspection plan for 2015/16

Executive summary

Purpose of intervention

This report covers a number of interventions with the Low Level Waste Repository (LLWR), relating to LLWR operations which were undertaken as part of the planned ONR LLWR inspection programme for 2015/16

Interventions Carried Out by ONR

During the visit a number of interventions/discussions were undertaken including :

Explanation of Judgement if Safety System Not Judged to be Adequate

Not applicable

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

Site Licence Condition 22 “Modification or experiment on existing Plant” Inspection – ONR considered that LLWR had adequately considered the issues raised during the January 2015 inspection and had embarked on a number of initiatives  to address them. The discussions provided a useful update on the work undertaken by LLWR following the inspection and the information will be utilised in the planning of a further inspection of the implementation of the arrangements which is included in the ONR 2015/16 LLWR Inspection plan.

PCM Decommissioning Project – LLWR outlined that the planned decommissioning work generally remained on programme. However, LLWR stated that the projected future funding restrictions would affect the forward project programme. ONR stated it was keen for the PCM decommissioning work to be progressed and stated that meetings had been arranged to discuss funding issues.  LLWR also stated that strip out work within the Magazine 4 waste export facility had now been completed and that final demolition was planned to commence imminently. The report on the inventory of the legacy drums was handed to ONR and the “discovery” that the majority of the drums may contain Hex reactor bed material has had a significant impact on the options/plans for the transport/export of the drums. It was agreed that a ONR/LLWR meeting would be arranged to discuss the issue further.

LLWR Safety Cases– ONR raised a number of issues and concerns relating to recently submitted Long Term Periodic Review (LTPR) of the LLWR Overarching Site Safety Case (OSSC) documentation. It was agreed that a further meeting will be arranged when LLWR had further considered the issues and concerns raised

Other interventions - It is considered that the various interventions undertaken did not raise any significant new issues or concerns. However a number of actions were placed on LLWR to progress and several topics will be followed up in future site visits/ discussions with LLWR staff.

Conclusion of Intervention

Other than the items outlined in the previous section no other matters were raised during the interventions covered by this report which were considered to require any immediate additional regulatory action.