Filters
Results 1 - 1 of 1
Results 1 - 1 of 1.
Search took: 0.024 seconds
Plurien, P.; Charpin, J.; Mommejac, S.
CEA Saclay, 91 - Gif-sur-Yvette (France)1958
CEA Saclay, 91 - Gif-sur-Yvette (France)1958
AbstractAbstract
[en] Barriers foreseen for the separation of uranium isotopes by gaseous diffusion must posses pores of about 100 Angstrom radius and as high an output as possible. They should thus be of small but uniform thickness. In view of these conditions it is necessary to adapt the normal methods available for studying porous materials in order to check the characteristics of the prototypes examined. It has been found that only by cross-comparison of data from various methods can progress in the development of different prototypes be followed. The following account consists of two parts: 1) A review of the main experimental methods we have used: a) various absorption methods, b) electron microscopy, c) X-ray studies, d) mercury porosimetry, e) liquid permeability, f) gas permeability, g) measurement of separation efficiency. 2) Comparison of the results obtained using these various methods and their application with a view to acquiring as complete a knowledge as possible of the structure of the barrier. (author)
[fr]
Les barrieres susceptibles d'etre utilisees pour la separation des isotopes de l'uranium, par diffusion gazeuse, doivent presenter des pores de rayon de l'ordre de 100 Angstrom et un debit aussi grand que possible. Elles doivent donc avoir une epaisseur faible et constante. Ces conditions necessitent une adaptation des methodes usuelles d'etude des corps poreux pour controler les caracteristiques des prototypes etudies. Il est apparu que seul le recoupement entre diverses methodes permet de suivre les progres dans la realisation de differents prototypes. L'expose qui va suivre comprend deux parties: 1) Une revue des principales methodes experimentales que nous utilisons: a) differentes methodes d'absorption, b) microscopie electronique, c) rayons X, d) porosimetrie a mercure, e) permeabilite aux liquides, f) permeabilite aux gaz, g) mesure de l'efficacite de separation. 2) Comparaison des differents resultats obtenus par ces diverses methodes et leur application a la connaissance la plus complete possible de la structure de la barriere. (auteur)Original Title
Application des methodes generales d'etudes des corps poreux a la determination des caracteristiques des barrieres
Primary Subject
Secondary Subject
Source
1958; 24 p; 15 refs.
Record Type
Report
Report Number
Country of publication
ALUMINIUM OXIDES, COMPARATIVE EVALUATIONS, DIFFUSION BARRIERS, EFFICIENCY, ELECTRON MICROSCOPY, GASEOUS DIFFUSION PROCESS, LEAKS, NICKEL, PERMEABILITY, PORE STRUCTURE, POROSIMETERS, POROSITY, POROUS MATERIALS, SINTERED MATERIALS, SPECIFIC SURFACE AREA, STRUCTURAL CHEMICAL ANALYSIS, TEFLON, THICKNESS, URANIUM 235, URANIUM 238, X-RAY DIFFRACTION
ACTINIDE NUCLEI, ALPHA DECAY RADIOISOTOPES, ALUMINIUM COMPOUNDS, CHALCOGENIDES, COHERENT SCATTERING, DIFFRACTION, DIMENSIONS, ELEMENTS, EVALUATION, EVEN-EVEN NUCLEI, EVEN-ODD NUCLEI, FLUORINATED ALIPHATIC HYDROCARBONS, HALOGENATED ALIPHATIC HYDROCARBONS, HEAVY NUCLEI, INTERNAL CONVERSION RADIOISOTOPES, ISOMERIC TRANSITION ISOTOPES, ISOTOPE SEPARATION, ISOTOPES, MATERIALS, MEASURING INSTRUMENTS, METALS, MICROSCOPY, MICROSTRUCTURE, MINUTES LIVING RADIOISOTOPES, NUCLEI, ORGANIC COMPOUNDS, ORGANIC FLUORINE COMPOUNDS, ORGANIC HALOGEN COMPOUNDS, ORGANIC POLYMERS, OXIDES, OXYGEN COMPOUNDS, PETROCHEMICALS, PETROLEUM PRODUCTS, PHYSICAL PROPERTIES, PLASTICS, POLYETHYLENES, POLYMERS, POLYOLEFINS, POLYTETRAFLUOROETHYLENE, RADIOISOTOPES, SCATTERING, SEPARATION PROCESSES, SPONTANEOUS FISSION RADIOISOTOPES, SYNTHETIC MATERIALS, TRANSITION ELEMENTS, URANIUM ISOTOPES, YEARS LIVING RADIOISOTOPES
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue