Show simple item record

dc.contributor.authorLowe, Tristanen
dc.contributor.authorYue, Shengen
dc.contributor.authorBari, Klaudioen
dc.contributor.authorGelb, Jeffen
dc.contributor.authorRohbeck, Nadiaen
dc.contributor.authorTurner, Joelen
dc.contributor.authorWithers, Philipen
dc.date.accessioned2016-12-02T09:31:51Z
dc.date.available2016-12-02T09:31:51Z
dc.date.issued2015-06
dc.identifier.citationLowe, T. et al (2015) 'Microstructural analysis of TRISO particles using multi-scale X-ray computed tomography' Journal of Nuclear Materials, 461:29en
dc.identifier.issn0022-3115
dc.identifier.doi10.1016/j.jnucmat.2015.02.034
dc.identifier.urihttp://hdl.handle.net/10545/621093
dc.description.abstractTRISO particles, a composite nuclear fuel built up by ceramic and graphitic layers, have outstanding high temperature resistance. TRISO fuel is the key technology for High Temperature Reactors (HTRs) and the Generation IV Very High Temperature Reactor (VHTR) variant. TRISO offers unparalleled containment of fission products and is extremely robust during accident conditions. An understanding of the thermal performance and mechanical properties of TRISO fuel requires a detailed knowledge of pore sizes, their distribution and interconnectivity. Here 50 nm, nano-, and 1 μm resolution, micro-computed tomography (CT), have been used to quantify non-destructively porosity of a surrogate TRISO particle at the 0.3–10 μm and 3–100 μm scales respectively. This indicates that pore distributions can reliably be measured down to a size approximately 3 times the pixel size which is consistent with the segmentation process. Direct comparison with Scanning Electron Microscopy (SEM) sections indicates that destructive sectioning can introduce significant levels of coarse damage, especially in the pyrolytic carbon layers. Further comparative work is required to identify means of minimizing such damage for SEM studies. Finally since it is non-destructive, multi-scale time-lapse X-ray CT opens the possibility of intermittently tracking the degradation of TRISO structure under thermal cycles or radiation conditions in order to validate models of degradation such as kernel movement. X-ray CT in-situ experimentation of TRISO particles under load and temperature could also be used to understand the internal changes that occur in the particles under accident conditions.
dc.description.sponsorshipScanning and analysis was performed at the Henry Moseley X-ray Imaging Facility which has been funded through support from EPSRC under Grants EP/F007906, EP/F028431 and EP/I02249X. Imaging on the UltraXRM-L200 system was carried out at Zeiss Xradia Inc., Pleasanton, CA, USA.en
dc.language.isoenen
dc.publisherElsevieren
dc.relation.urlhttp://linkinghub.elsevier.com/retrieve/pii/S0022311515001294en
dc.rightsArchived with thanks to Journal of Nuclear Materialsen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subjectX-ray tomographyen
dc.subjectTriso particlesen
dc.titleMicrostructural analysis of TRISO particles using multi-scale X-ray computed tomographyen
dc.typeArticleen
dc.contributor.departmentUniversity of Derbyen
dc.identifier.journalJournal of Nuclear Materialsen
refterms.dateFOA2019-02-28T15:08:42Z
html.description.abstractTRISO particles, a composite nuclear fuel built up by ceramic and graphitic layers, have outstanding high temperature resistance. TRISO fuel is the key technology for High Temperature Reactors (HTRs) and the Generation IV Very High Temperature Reactor (VHTR) variant. TRISO offers unparalleled containment of fission products and is extremely robust during accident conditions. An understanding of the thermal performance and mechanical properties of TRISO fuel requires a detailed knowledge of pore sizes, their distribution and interconnectivity. Here 50 nm, nano-, and 1 μm resolution, micro-computed tomography (CT), have been used to quantify non-destructively porosity of a surrogate TRISO particle at the 0.3–10 μm and 3–100 μm scales respectively. This indicates that pore distributions can reliably be measured down to a size approximately 3 times the pixel size which is consistent with the segmentation process. Direct comparison with Scanning Electron Microscopy (SEM) sections indicates that destructive sectioning can introduce significant levels of coarse damage, especially in the pyrolytic carbon layers. Further comparative work is required to identify means of minimizing such damage for SEM studies. Finally since it is non-destructive, multi-scale time-lapse X-ray CT opens the possibility of intermittently tracking the degradation of TRISO structure under thermal cycles or radiation conditions in order to validate models of degradation such as kernel movement. X-ray CT in-situ experimentation of TRISO particles under load and temperature could also be used to understand the internal changes that occur in the particles under accident conditions.


Files in this item

Thumbnail
Name:
Publisher version
Thumbnail
Name:
1-s2.0-S0022311515001294-main.pdf
Size:
2.869Mb
Format:
PDF
Description:
Published version

This item appears in the following Collection(s)

Show simple item record

Archived with thanks to Journal of Nuclear Materials
Except where otherwise noted, this item's license is described as Archived with thanks to Journal of Nuclear Materials