Engineering properties of nuclear waste slurries

Biggs, Simon, Fairweather, Michael, Hunter, Timothy, Omokanye, Qanitalillahi and Peakall, Jeffrey (2009). Engineering properties of nuclear waste slurries. In: Proceedings of the 12Th International Conference On Environmental Remediation and Radioactive Waste Management 2009, Vol 1. 12th International Conference on Environmental Remediation and Radioactive Waste Management, Liverpool England, (353-360). Oct 11-15, 2009. doi:10.1115/ICEM2009-16378


Author Biggs, Simon
Fairweather, Michael
Hunter, Timothy
Omokanye, Qanitalillahi
Peakall, Jeffrey
Title of paper Engineering properties of nuclear waste slurries
Conference name 12th International Conference on Environmental Remediation and Radioactive Waste Management
Conference location Liverpool England
Conference dates Oct 11-15, 2009
Proceedings title Proceedings of the 12Th International Conference On Environmental Remediation and Radioactive Waste Management 2009, Vol 1
Publisher ASME
Publication Year 2009
Sub-type Fully published paper
DOI 10.1115/ICEM2009-16378
Open Access Status DOI
ISBN 978-0-7918-4407-6
978-0-7918-3865-X
Start page 353
End page 360
Total pages 8
Language eng
Abstract/Summary The type of particulate systems encountered in legacy nuclear waste slurries is highly complicated, with the aggregation and flow behaviour being at times very variable. However, deconstructing the complex overall slurry activity to singular particle-particle interactions can lead to a greater understanding of the mechanisms involved with particle aggregation, and so to predictions of their settling and flow in nuclear systems. Of particular importance to legacy waste is the role of salts in controlling the attraction of particles (and so in dictating the rheological properties of the system) as sludge may contain a variety of specific ions and generally have high ionic conductivity [1]. In this paper, particle-particle interactions are characterised using a number of complimentary methods, and their influence on resulting flow and bed compression is measured. The methods used to characterise the particle-particle interactions under various salt and pH conditions were electroacoustic analysis (zeta potential) and atomic force microscopy (AFM). Following on from the analysis of particle-particle properties, bulk sediment behaviour was investigated using shear and compressive yield stress measurements, vital parameters in dictating flow and dewatering performance, respectively. Together, these techniques enable the characterisation of a range of particulate systems that may be encountered in legacy wastes, and results point to a number of important factors that can help explain the observed variability in industrial slurry behaviour.
Keyword Suspension
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status Non-UQ

 
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