Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Development of a multi criteria decision analysis framework for the assessment of integrated waste management options for irradiated graphite

  • Received : 2020.03.31
  • Accepted : 2020.10.12
  • Published : 2021.04.25
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Abstract

An integrated waste management approach for irradiated graphite was developed during the European Commission project 'Treatment and Disposal of Irradiated Graphite and other Carbonaceous Waste'. This included the identification of potential options for the management of irradiated graphite, taking account of storage, retrieval, treatment and disposal methods. This paper describes how these options can be assessed using multi-criteria decision analysis (MCDA) for a case study relating to a generic power reactor. Criteria have been defined to account for safety, environmental, economic and socio-political factors, including radiological impact, resource usage, economic costs and risks. The impact of each option against each criterion has been assessed using data from the project and the wider literature. A linear additive approach has been used to convert the calculated impacts to scores. To account for the relative importance of the criteria, example weightings were allocated. This application has shown that MCDA approaches can be used to support complex decisions regarding irradiated graphite management, accounting for a wide range of criteria. Use of this approach by individual countries or organisations will need to account for the specific options, scores, weightings and constraints that apply, based on their national strategies, regulatory requirements and public acceptability.

Keywords

Acknowledgement

The authors would like to acknowledge the financial support of the European Commission (European Atomic Energy Community-EURATOM) for funding project 211333 in the Seventh Framework Programme for nuclear research and training, and their fellow partners in this research consortium. The authors would also like to acknowledge the support of the Nuclear Decommissioning Authority Radioactive Waste Management Directorate, now Radioactive Waste Management Ltd, and of the NNL "Waste Management, Decommissioning and Disposal" Signature Research Programme.

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