Cameco UO3 Materials Analysis

Hill, Mary Ann¹  Nolen, Blake Penfield¹  Wermer, Joseph R.¹  Wilkerson, Marianne P.¹  Fredenburg, David A.¹  Wagner, Gregory L.¹  Papin, Pallas A.¹  Scott, Brian L.¹  Guidry, Dennis Ray¹ 

[1]Los Alamos National Laboratory

关键词: DISTRIBUTION;    ELECTRON MICROSCOPES;    GRAVIMETRIC ANALYSIS;    MORPHOLOGY;    PARTICLE SIZE;    PHYSICAL PROPERTIES;    STOICHIOMETRY;    URANIUM TRIOXIDE;    X-RAY DIFFRACTION;   

DOI  :  10.2172/1046495
RP-ID  :  LA-UR-12-22920
PID  :  OSTI ID: 1046495
Others  :  TRN: US1203819

学科分类：核能源与工程

美国|英语

来源: SciTech Connect

【 摘 要 】

Uranium trioxide (UO{sub 3}) was characterized using a variety of techniques to better understand its physical properties. Scanning electron microscope (SEM) images were collected to examine particle morphology, which consisted of semi-spherical particles that tended to agglomerate before sonication. Particle size analysis revealed a singular mode distribution with a mean particle size of 43.0 {micro}m. After sonication a bimodal distribution was produced with peak particle sizes at 0.226 {micro}m and 9.43 {micro}m. The O/U ratio was measured to be 3.09 by Cameco in 2009, by gravimetric analysis. X-ray diffraction (XRD) showed that the sample was mostly {gamma}-UO{sub 3} (87.1%) with a small amount of UO{sub 3} {center_dot} 0.80 H{sub 2}O (12.9%). Bulk and tap densities were determined to be 3.678 {+-} 0.2 and 4.81 {+-} 0.2 g/cm{sup 3}, respectively (crystalline density is 7.3 g/cm{sup 3}). The stoichiometry was measured to be 2.99 in 2012.