Alligator Rivers analogue project final report volume 14 radionuclide transport

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dc.contributor.authorGolian, Cen_AU
dc.contributor.authorLever, DAen_AU
dc.contributor.authorBaker, AJen_AU
dc.contributor.authorBennett, DGen_AU
dc.contributor.authorBrandberg, Fen_AU
dc.contributor.authorConnell, LDen_AU
dc.contributor.authorKimura, Hen_AU
dc.contributor.authorLindgren, Men_AU
dc.contributor.authorMurakami, Ten_AU
dc.contributor.authorOhnuki, Ten_AU
dc.contributor.authorPers, Ken_AU
dc.contributor.authorRead, Den_AU
dc.contributor.authorSkagius, Ken_AU
dc.contributor.authorSnelling, Aen_AU
dc.date.accessioned2025-03-21T05:41:55Zen_AU
dc.date.available2025-03-21T05:41:55Zen_AU
dc.date.issued1992en_AU
dc.date.statistics2024-11-26en_AU
dc.description.abstractThe Koongarra orebody and its associated dispersion fan are examined as a geological analogue for the transport of radionuclides from waste repositories. The aim is to build a consistent picture of the transport that has been taking place in the orebody and the important processes controlling the retardation of uranium series isotopes and to test models of radionuclide transport. A particularly distinctive feature of the Koongarra system is the strong seasonal dependence of the groundwater flow. However, the Koongarra system is similar to a radioactive waste disposal system in that mobilization of uranium is taking place as a result of the infiltration of groundwaters that are in gross chemical disequilibrium with the mineralogy of the primary ore body. There are considerable differences between the Koongarra uranium orebody and a radioactive waste repository, particularly a deep waste repository. The Koongarra system is shallow, affected by seasonal hydrogeological changes as well as climatic variations on a longer timescale and transport is taking place in a zone of active weathering. Some of these features make the Koongarra system harder to characterise than a deep repository. However, there are nevertheless many analogies between the processes occurring at Koongarra and those occurring around a deep or shallow waste repository. The difficulties encountered because of the heterogeneity of the Koongarra weathered zone mirror those to be addressed in assessing radionuclide transport in repository systems. The 234U/238U activity ratios in rock samples from the dispersion fan decrease in the direction of groundwater transport, whereas in many other systems it has been reported that 234U is preferentially mobile relative to 238U (Osmond and Cowart, 1982; Osmond et al., 1983). As most uranium resides in the rock rather than in the groundwater, the net recoil flux of uranium daughter radionuclides is usually from the rock to the groundwater, thus leading to (234U/238U)r less than one. Other models explain the observations by invoking the presence of a phase in which 234Th is irreversibly fixed.en_AU
dc.identifier.citationGolian, C., Lever, D. A., Baker, A. J., Bennett, D. G., Brandberg, F., Connell, L. D., Kimura, H., Lindgren, M., Murakami, T., Ohnuki, T., Pers, K., Read, D., Skagius, K., & Snelling, A. (1992). Alligator Rivers analogue project final report volume 14 radionuclide transport. Menai, Australia : Alligator Rivers analogue project final report volume 14 radionuclide transporten_AU
dc.identifier.govdoc9982en_AU
dc.identifier.isbn0642599408en_AU
dc.identifier.otherDOE/HMIP/RR/92/084en_AU
dc.identifier.otherSKI TR 92:20-14en_AU
dc.identifier.pagination1-272en_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/16090en_AU
dc.identifier.volume14en_AU
dc.language.isoenen_AU
dc.publisherAustralian Nuclear Science and Technology Organisationen_AU
dc.subjectActivity levelsen_AU
dc.subjectFlow modelsen_AU
dc.subjectGeologic modelsen_AU
dc.subjectGround wateren_AU
dc.subjectKoongarra depositen_AU
dc.subjectNatural analogueen_AU
dc.subjectNumerical solutionen_AU
dc.subjectOne-dimensional calculationsen_AU
dc.subjectRadioactive effluentsen_AU
dc.subjectRadioactive waste disposalen_AU
dc.subjectRadionuclide migrationen_AU
dc.subjectRock-fluid interactionsen_AU
dc.subjectSensitivity analysisen_AU
dc.subjectSimulationen_AU
dc.subjectTheoretical dataen_AU
dc.subjectThorium 232en_AU
dc.subjectTwo-dimensional calculationsen_AU
dc.subjectUranium 234en_AU
dc.subjectUranium 238en_AU
dc.subjectUranium oresen_AU
dc.subjectActinide nucleien_AU
dc.subjectAlpha decayen_AU
dc.subjectRadioisotopesen_AU
dc.subjectDataen_AU
dc.subjectEnvironmental transporten_AU
dc.titleAlligator Rivers analogue project final report volume 14 radionuclide transporten_AU
dc.typeBooken_AU
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