Characterisation of hot isostatically pressed (HIPed) hollandite wasteform-canister interaction zone

Simple item page
dc.contributor.authorMann, Jen_AU
dc.contributor.authorFarzana, Ren_AU
dc.contributor.authorAughterson, RDen_AU
dc.contributor.authorDayal, Pen_AU
dc.contributor.authorSorrell, CCen_AU
dc.contributor.authorKoshy, Pen_AU
dc.contributor.authorGregg, DJen_AU
dc.date.accessioned2025-01-12T23:43:14Zen_AU
dc.date.available2025-01-12T23:43:14Zen_AU
dc.date.issued2024-02en_AU
dc.date.statistics2024-10-23en_AU
dc.descriptionAll authors thank the Australian Institute of Nuclear Science and Engineering (AINSE) scholarship for financial support, Analytical Centre of the University of New South Wales (UNSW) and the Nuclear Materials Development and Characterisation (NMDC) for technical support. We also acknowledge help from Dr. Charlie Kong for assistance with focussed ion beam milling, Ian Watson and Iveta Kurlapski for assistance with sample preparation, Neil Webb for HIPing, and Nuclear Science and Technology (NST) at ANSTO for material characterisations.en_AU
dc.description.abstractA potential hollandite wasteform for immobilising waste containing Cs, Ba, Sr, and Rb, projected from a solvent extraction process that separates Cs/Sr from spent nuclear fuel, was fabricated via hot isostatic pressing (HIPing) within a stainless-steel (SS) canister at 1250 °C / 30 MPa / 2 h. Before HIPing, 2 wt.% Ti metal was added to the precursor, as a redox control additive. Detailed elemental profiling and microstructural analysis at the interaction zone between the wasteform and the SS HIP canister were thoroughly investigated with transmission electron microscopy (TEM) using a lamella extracted by focused ion beam (FIB) milling, scanning electron microscopy (SEM) and X-ray diffraction (XRD). The interaction zone towards the wasteform was ∼20–30 µm in distance and in this region, a hollandite composition with varying chemistry was observed relative to the bulk wasteform. Moreover, the regular Cr-oxide layer, often observed previously for HIPed Synroc-type materials, was not present due to the achievement of reducing condition by adding Ti-metal as redox additive and simultaneous diffusion of canister material towards the ceramic. Predominant Cr-diffusion was observed with incorporation in the hollandite phase along with minor Fe, Mn and Co from the SS canister. This study provides a detailed understanding of the HIP canister – wasteform interaction zone for a hollandite-rich wasteform design for the first time. Importantly, no deleterious phases were formed that may otherwise reduce the performance of the wasteform. This study further demonstrates the flexibility of HIPing as a consolidation process for the treatment of radioactive wastes. © 2023 Elsevier B.V.en_AU
dc.identifier.articlenumber154863en_AU
dc.identifier.citationMann, J., Farzana, R., Aughterson, R. D., Dayal, P., Sorrell, C. C., Koshy, P., & Gregg, D. J. (2024). Characterisation of hot isostatically pressed (HIPed) hollandite wasteform-canister interaction zone. Journal of Nuclear Materials, 589, 154863. doi:10.1016/j.jnucmat.2023.154863en_AU
dc.identifier.issn0022-3115en_AU
dc.identifier.journaltitleJournal of Nuclear Materialsen_AU
dc.identifier.urihttps://doi.org/10.1016/j.jnucmat.2023.154863en_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/15915en_AU
dc.identifier.volume589en_AU
dc.languageEnglishen_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectHollanditeen_AU
dc.subjectChemistryen_AU
dc.subjectCesiumen_AU
dc.subjectBromineen_AU
dc.subjectStrontiumen_AU
dc.subjectRubidiumen_AU
dc.subjectNuclear fuelsen_AU
dc.subjectStainless steelsen_AU
dc.subjectElectron microscopyen_AU
dc.subjectOxidesen_AU
dc.subjectSynroc processen_AU
dc.subjectX-ray diffractionen_AU
dc.subjectSolvent extractionen_AU
dc.subjectWaste formsen_AU
dc.titleCharacterisation of hot isostatically pressed (HIPed) hollandite wasteform-canister interaction zoneen_AU
dc.typeJournal Articleen_AU
Files
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
1.66 KB
Format:
Plain Text
Description:
Download
Collections
Journal Articles