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Selection and Evaluation of Inner Material Canididates for Spanish Highlevel Radioactive Waste Canisters

[+] Author Affiliations
Francesc Puig, Javier Dies, Manuel Sevilla, Joan de Pablo

Universitat Politècnica de Catalunya, Barcelona, Spain

Juan José Pueyo, Lourdes Miralles

Universitat de Barcelona, Barcelona, Spain

Aurora Martínez-Esparza

Empresa Nacional de Residuos Radioactivos S.A., Madrid, Spain

Paper No. ICEM2007-7178, pp. 285-292; 8 pages
doi:10.1115/ICEM2007-7178
From:
  • The 11th International Conference on Environmental Remediation and Radioactive Waste Management
  • 11th International Conference on Environmental Remediation and Radioactive Waste Management, Parts A and B
  • Bruges, Belgium, September 2–6, 2007
  • Conference Sponsors: Nuclear Division and Environmental Engineering Division
  • ISBN: 978-0-7918-4339-0 | eISBN: 0-7918-3818-8
  • Copyright © 2007 by ASME

abstract

This paper summarizes the work carried out to analyse different alternatives related to the inner material selection of the Spanish high level waste canister for long term storage. The preliminary repository design considers granitic or clay formations, compacted bentonite sealing, corrosion allowing steel canisters and glass bead filling between the fuel assemblies and canister walls. This filling material will have the primary role of avoiding the possibility of a criticality event, which becomes an issue of major importance once the container is finally breached by corrosion and flooded by groundwater. In the first place, a complete set of requirements have been devised as evaluation criteria for candidate materials examination and selection; resulting in a compilation of demands significantly deeper and more exhaustive than any other similar work found in literature, including over 20 requirements and some other general aspects that could involve improvements in repository performance. Secondly, eight materials or material families (cast iron or steel, borosilicate glass, spinel, depleted uranium, dehydrated zeolites, hematite, phosphates and olivine) have been chosen and examined in detail, extracting some relevant conclusions. Either cast iron, borosilicate glass, spinel or depleted uranium are considered to look quite promising for the mentioned purpose.

Copyright © 2007 by ASME

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