Effects of aluminum distearate addition on UO2 sintering and microstructure

dc.creatorFREITAS, ARTUR C. de
dc.creatorCOSTA, DIOGO R.
dc.creatorJARDIM, PAULA M.
dc.creatorLEAL NETO, RICARDO M.
dc.creatorCARVALHO, ELITA F.U. de
dc.creatorDURAZZO, MICHELANGELO
dc.date2022
dc.date2022-12-16T12:29:39Z
dc.date2022-12-16T12:29:39Z
dc.date.accessioned2023-09-28T14:23:50Z
dc.date.available2023-09-28T14:23:50Z
dc.identifier0149-1970
dc.identifierhttp://repositorio.ipen.br/handle/123456789/33460
dc.identifier153
dc.identifier10.1016/j.pnucene.2022.104440
dc.identifier0000-0002-2147-8295
dc.identifier0000-0001-5104-7392
dc.identifier86.8
dc.identifier63.75
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/9003679
dc.descriptionUranium dioxide (UO2) is widely used as a fuel in commercial nuclear light-water reactors (LWRs). Rigorous control of density, pore, and grain size of UO2 pellets are important prerequisites for fuel performance. Solid lubricants, frequently used in pellets manufacturing, minimize structural defects on compaction such as cracks and end-capping, promoting grain growth during sintering. This work presents and discusses the effects of the aluminum distearate (ADS) addition on the sintering behavior and microstructure of UO2 fuel pellets. UO2 and UO2-0.2wt% ADS pellets were sintered at 1760 ??C for 5.7 h for comparison purposes. The results show that the densification rate increases using the solid lubricant, but the shrinkage is lowered by 0.7% due to low homogenization. The average grain size was increased by about 35% during sintering. Based on our results and a literature review, a mechanism for grain growth by aluminum addition is proposed.
dc.format1-12
dc.relationProgress in Nuclear Energy
dc.rightsopenAccess
dc.subjectURANIUM DIOXIDE??
dc.subjectNUCLEAR FUELS
dc.subjectNUCLEAR FUELS
dc.subjectREACTORS
dc.subjectFUEL PELLETS
dc.subjectALUMINIUM
dc.subjectSINTERING
dc.subjectGRAIN GROWTH
dc.titleEffects of aluminum distearate addition on UO2 sintering and microstructure
dc.typeArtigo de peri??dico
dc.coverageI


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