Pyrochlore glass-ceramics for the immobilization of molybdenum-99 production wastes: demonstrating scalability and flexibility to waste stream variance

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dc.contributor.authorFarzana, Ren_AU
dc.contributor.authorZhang, YJen_AU
dc.contributor.authorDayal, Pen_AU
dc.contributor.authorAly, Zen_AU
dc.contributor.authorHolmes, Ren_AU
dc.contributor.authorTriani, Gen_AU
dc.contributor.authorVance, ERen_AU
dc.contributor.authorGregg, DJen_AU
dc.date.accessioned2023-10-06T04:45:19Zen_AU
dc.date.available2023-10-06T04:45:19Zen_AU
dc.date.issued2021-11en_AU
dc.date.statistics2023-09-28en_AU
dc.description.abstractPyrochlore glass ceramics have been fabricated via in-situ crystallization under reducing conditions by both sintering and hot isostatic pressing (HIPing) as candidate wasteforms for the acidic waste biproduct of Mo-99 radiopharmaceutical production. The tailored wasteform demonstrates flexibility in the wasteform design to receive the required waste variability, it also suitably passes high-level waste performance requirement, and successfully scales to 1 kg scale with 45 wt.% waste loading. U-rich pyrochlore as the major phase was confirmed by X-ray diffraction, scanning electron microscopy and energy dispersive X-ray spectroscopy, with residual glass and minor secondary phases. The presence of both U4+ and U5+ valences in the wasteforms was revealed by diffuse reflectance spectroscopy. Addition of glass content had little influence on the pyrochlore composition but facilitated minor perovskite formation. The up-scaled dense, HIPed sample showed elemental releases of < 2 g/L for all elements in durability experiments. © 2021 Elsevier Ltden_AU
dc.identifier.citationFarzana, R., Zhang, Y., Dayal, P., Aly, Z., Holmes, R., Triani, G., Vance, E. R., & Gregg, D. J. (2021). Pyrochlore glass-ceramics for the immobilization of molybdenum-99 production wastes: demonstrating scalability and flexibility to waste stream variance. Journal of the European Ceramic Society, 41(14), 7269-7281. doi:10.1016/j.jeurceramsoc.2021.06.056en_AU
dc.identifier.issn0955-2219en_AU
dc.identifier.issue14en_AU
dc.identifier.journaltitleJournal of the European Ceramic Societyen_AU
dc.identifier.pagination7269-7281en_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/15144en_AU
dc.identifier.volume41en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.relation.urihttps://doi.org/10.1016/j.jeurceramsoc.2021.06.056en_AU
dc.subjectPyrochloreen_AU
dc.subjectGlassen_AU
dc.subjectCeramicsen_AU
dc.subjectWaste formsen_AU
dc.subjectMolybdenum 99en_AU
dc.subjectRadioactive wastesen_AU
dc.subjectHot pressingen_AU
dc.subjectSolidificationen_AU
dc.subjectCrystallizationen_AU
dc.titlePyrochlore glass-ceramics for the immobilization of molybdenum-99 production wastes: demonstrating scalability and flexibility to waste stream varianceen_AU
dc.typeJournal Articleen_AU
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