Office for Nuclear Regulation

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Joint ONR/EA Land Quality Inspection of East Side Curtilage CNS Capenhurst

Executive summary

Purpose of intervention

This intervention was a joint Office for Nuclear Regulation and Environment Agency inspection of the land characterisation project at the East Side Curtilage area at the Capenhurst nuclear licensed. 

Interventions Carried Out by ONR

Capenhurst Nuclear Services Limited, a tenant organisation on the Urenco UK Limited nuclear licensed site at Capenhurst, presented detail of its characterisation plans for the East Side Curtilage area. A visit to the East Side Curtilage area followed to view the progress of the characterisation work and the extent of materials remaining accumulated in the area. Findings were considered against the requirements of Licence Condition 32 and 34 in addition to the relevant Safety Assessment Principals and the Joint Regulatory Expectations Paper for Successful Land Quality Management at Nuclear Licensed Sites.

Explanation of Judgement if Safety System Not Judged to be Adequate

N/A

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

It was evident that Capenhurst Nuclear Services Limited has made progress in decommissioning the East Side Curtilage area from that observed during an inspection in 2012, with much of the material stored there at that time now having been removed and disposed of.

Capenhurst Nuclear Services Limited intend to develop a remediation strategy dependent on the findings of characterisation. Regulators were informed that the remediation strategy for the East Side Curtilage Area will be based on the expected ‘end use’ with the intention for the Nuclear Decommissioning Authority to de-designate that area. The Office for Nuclear Regulation and the Environment Agency intend to review the remediation strategy to ensure that all credible options for remediation have been considered and risk to people and the environment is reduced to as low as is reasonably practicable.

Effective and efficient project management of this area by the Project Manager was observed, which has given us confidence that the area will not revert to its former state and that the planned project will continue to be delivered in a safe and timely manner.

It is considered that the land characterisation plan for the East Side Curtilage area and implementation to date is adequate.

From evidence presented and that observed during this visit, we judge that compliance with Licence Condition 32 and 34 is adequate in relation to arrangements in place to minimise accumulation of radioactive contaminated waste in the East Side Curtilage area of site, and control leak and escape out of the area.

Conclusion of Intervention

Capenhurst Nuclear Services Limited and the site licensee, Urenco UK Limited, agreed to include the East Side Curtilage area characterisation and remediation project on the site quarterly meetings to enable progress with the project to be reported to regulators.

Capenhurst Nuclear Services Limited will provide the remediation strategy to regulators for review prior to submission to the Nuclear Decommissioning Authority to ensure regulators are satisfied that all credible options for remediation have been considered and risk to people and the environment is reduced to as low as is reasonably practicable.