Impact of fine particles on the rheological properties of uranium dioxide powders

Madian A.; Leturia M.; Ablitzer C.; Matheron P.; Bernard-Granger G.; Saleh K.

doi:10.1016/j.net.2020.01.012

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자료유형: 학술저널

저자정보: Madian A. (Centre de Recherche Royallieu) Leturia M. (Centre de Recherche Royallieu) Ablitzer C. (CEA) Matheron P. (CEA) Bernard-Granger G. (CEA) Saleh K. (Centre de Recherche Royallieu)

저널정보: 한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제52권 제8호

발행연도: 2020.8

수록면: 1,714 - 1,723 (10page)

DOI: 10.1016/j.net.2020.01.012

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This study aims at characterizing the rheological properties of uranium oxide powders for nuclear fuel pellets manufacturing. The flowability of these powders must be compatible with a reproducible filling of press molds. The particle size distribution is known to have an impact on the rheological properties and fine particles (<100 mm) are suspected to have a detrimental effect. In this study, the impact of the particle size distribution on the rheological properties of UO2 powders was quantified, focusing on the influence of fine particles. Two complementary approaches were used. The first approach involved characterizing the powder in a static state: density, compressibility and shear test measurements were used to understand the behavior of the powder when it is transitioned from a static to a dynamic state (i.e., incipient flow conditions). The second approach involved characterizing the behavior of the powder in a dynamic state. Two zones, corresponding to two characteristic behaviors, were demonstrated for both types of measurements. The obtained results showed the amount of fines should be kept below 10 % wt to ensure a robust mold filling operation (i.e., constant mass and production rate).

#Uranium dioxide #Cohesive powders #Powder rheology #Flowability #Die filling

참고문헌 (24)

참고문헌 신청

Commissariat aenergie atomique et aux energies alternatives / 2016 / Sodiumcooled nuclear reactors / Editions Le Moniteur

X. Fu / 2012 / Effect of particle shape and size on flow properties of lactose powders / Particuology 10:203~208

Q. Li / 2004 / Interparticle van der Waals force in powder flowability and compactibility / Int. J. Pharm 280:77~93

E. C. Abdullah / 1999 / The use of bulk density measurements as flowability indicators / Powder Technol 102:151~165

D. Geldart / 2009 / Characterisation of dry powders / Powder Technol 190:70~74

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