Characterising highly active nuclear waste simulants

Paul, Neepa, Biggs, Simon, Edmondson, Michael, Hunter, Timothy N. and Hammond, Robert B. (2013) Characterising highly active nuclear waste simulants. Chemical Engineering Research and Design, 91 4: 742-751. doi:10.1016/j.cherd.2013.02.017


Author Paul, Neepa
Biggs, Simon
Edmondson, Michael
Hunter, Timothy N.
Hammond, Robert B.
Title Characterising highly active nuclear waste simulants
Journal name Chemical Engineering Research and Design   Check publisher's open access policy
ISSN 0263-8762
1744-3563
Publication date 2013-04
Year available 2013
Sub-type Article (original research)
DOI 10.1016/j.cherd.2013.02.017
Open Access Status
Volume 91
Issue 4
Start page 742
End page 751
Total pages 10
Place of publication London, United Kingdom
Publisher Elsevier
Language eng
Formatted abstract
Reprocessing of spent nuclear fuel produces a highly active liquor (HAL) waste stream, which is typically stored over extended periods of many years in waste tanks equipped with extensive heat exchange capability. Over time, particulates are known to precipitate from the HAL within these tanks. Particle simulants provide a route for understanding the physical behaviour of these HAL solids under different agitation and transfer conditions. Particle and dispersion characterisation techniques are used here to understand the behaviour of two types of simulant HAL solids, viz. caesium phosphomolybdate (CPM) and zirconium molybdate (ZM), in dispersion. Distinct properties are established for CPM and ZM and compared to a common oxide particle material titanium dioxide (TiO2). The results of this study highlight the influence of key aspects of the HAL particulates, such as size and shape, on relevant solid-liquid properties such as sedimentation and rheology. The influence of bulk liquid properties such as electrolyte concentration and pH is also investigated. The results indicate various possible behaviours within the tanks which may impact the storage, remobilisation and pipeline transport of this class of nuclear waste.
Keyword Nuclear waste
Particle characterisation
Rheology
Sedimentation
Waste management
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Faculty of Engineering, Architecture and Information Technology Publications
 
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