Chalk River Laboratories

About: Chalk River Laboratories is a based out in . It is known for research contribution in the topics: Neutron diffraction & Neutron scattering. The organization has 2297 authors who have published 2700 publications receiving 73287 citations.

Hydrodynamic behaviour of a horizontal pulsed solvent extraction column. part 1: Flow characterization, throughput capacity and holdup

Abstract: A horizontal pulsed solvent extraction column (HPC) has great potential in replacing vertical pulsed columns (VPC) in the separation of heavy elements in the nuclear industry. Published work examining the performance of the HPC suggests that the mass transfer efficiency for this column is comparable to the VPC, but information on the hydrodynamic characteristics of the HPC is sparse. This paper describes the flow characteristics of the HPC and presents experimental results and correlations for flooding conditions and holdup of the dispersed phase. Correlations obtained for the HPC for these hydrodynamic parameters are compared to published results for the VPC. La colonne pulsee horizontale (HPC) servant a l'extraction de solvants montre un fort potentiel pour remplacer les colonnes pulsees verticales (VPC) dans la separation des elements lourds dans l'industrie nucleaire. Les travaux publies examinant la performance de la colonne horizontale suggerent que l'efficacite du transfert du matiere pour cette colonne est comparable a celle de la colonne verticale, mais les donnees sur les caracteristiques de la HPC sont rares. On decrit dans cet article les caracteristiques d'ecoulement de la HPC et on presente des resultats experimentaux et des correlations pour des conditions d'engorgement et la retention de la phase dispersee. Les corre'lations obtenues pour la colonne horizontale pour ces parametres hydrodynamiques sont comparees aux resultats publies pour la colonne verticale.

The magnetic structures of Nd5Si4 and Nd5Ge4

Abstract: We have determined the magnetic structures of Nd5Si4 and Nd5Ge4 by means of high-resolution neutron powder diffraction. The crystal space groups of these compounds are tetragonal P41212 and orthorhombic Pnma, respectively. Their magnetic ordering temperatures are 66(2) and 51(2) K, respectively, and both magnetic structures can be described as canted structures, with net antiferromagnetism in one plane with ferromagnetism perpendicular to that plane. The magnetic space groups are P4121'2' and Pnm'a' and their ferromagnetic ordering directions are [001] and [100], respectively.

A Model to Predict the Moisture Content of Reindeer Lichen

Abstract: Un modele de dessication de Cladina rangiferina a ete etabli d'apres le code d'humidite du petit combustible (fine fuel moisture code) du service forestier canadien. Les taux d'humidite calcules sont compares aux valeurs mesurees sur le terrain. Des instructions sont donnees pour etablir le code d'humidite de Cladina rangiferina dans le combustible de surface domine par ce lichen