Laboratory studies of the diffusive transport of 137Cs and 60Co through potential waste repository soils

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dc.contributor.authorItakura, Ten_AU
dc.contributor.authorAirey, DWen_AU
dc.contributor.authorLeo, CJen_AU
dc.contributor.authorPayne, TEen_AU
dc.contributor.authorMcOrist, GDen_AU
dc.date.accessioned2010-07-21T06:46:00Zen_AU
dc.date.available2010-07-21T06:46:00Zen_AU
dc.date.issued2010-09en_AU
dc.date.statistics2010-09en_AU
dc.description.abstractTests using reconstituted samples have been performed to assess the diffusive transport of 137Cs and 60Co through natural regolith materials from a region in South Australia being considered for a radioactive waste repository. A double diffusion cell apparatus made of polycarbonate resin was developed to estimate the effective diffusion (De) and sorption coefficients (Kd) that allowed large withdrawals from the source and collector cells and has enabled tests with low concentrations of radioactivity. An alternative to porous stainless steel filter plates has also been used to reduce uncertainty in test interpretation. Analysis of the transient data used a staged method of the Laplace transform to take into consideration the volume of the samples withdrawn from the apparatus during testing. At test completion samples were cut into slices and analysed for radionuclide concentration. Data obtained from the sliced samples confirmed that both numerical and experimental data produced acceptable mass balance. The De values obtained in this study were of the order of 10−6 cm2 s−1 for both species, higher than previously published data. The Kd values from the diffusion and batch sorption tests were in reasonable agreement for 137Cs, but an order of magnitude different for 60Co. The sorption of the latter radionuclide was strongly pH dependent, and this dependency during diffusion tests would benefit from further investigation. © 2010, Elsevier Ltd.en_AU
dc.identifier.citationItakura, T., Airey, D. W., Leo, C. J, Payne, T., & McOrist, G. D. (2010). Laboratory studies of the diffusive transport of 137Cs and 60Co through potential waste repository soils. Journal of Environmental Radioactivity, 101(9), 723-729. doi:10.1016/j.jenvrad.2010.04.015en_AU
dc.identifier.govdoc1941en_AU
dc.identifier.issn0265-931Xen_AU
dc.identifier.issue9en_AU
dc.identifier.journaltitleJournal of Environmental Radioactivityen_AU
dc.identifier.pagination723-729en_AU
dc.identifier.urihttp://dx.doi.org/10.1016/j.jenvrad.2010.04.015en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/1841en_AU
dc.identifier.volume101en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectSouth Australiaen_AU
dc.subjectWaste disposalen_AU
dc.subjectSoilsen_AU
dc.subjectDiffusionen_AU
dc.subjectCobalt 60en_AU
dc.subjectCesium 137en_AU
dc.titleLaboratory studies of the diffusive transport of 137Cs and 60Co through potential waste repository soilsen_AU
dc.typeJournal Articleen_AU
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