Liquid-phase compositions from vapor-phase analyses
- Oak Ridge Gaseous Diffusion Plant, TN (USA)
- Oak Ridge National Lab., TN (USA)
Arsenic normally is not considered to be a contaminant. However, because arsenic was found in many cylinders of UF{sub 6}, including in corrosion products, a study was performed of the distribution of the two arsenic fluorides, AsF{sub 3} and AsF{sub 5}, between liquid and vapor phases. The results of the study pertain to condensation or vaporization of liquid UF{sub 6}. This study includes use of various experimental data plus many extrapolations necessitated by the meagerness of the experimental data. The results of this study provide additional support for the vapor-liquid equilibrium model of J.M. Prausnitz and his coworkers as a means of describing the distribution of various impurities between vapor and liquid phases of UF{sub 6}. Thus, it is concluded that AsF{sub 3} will tend to concentrate in the liquid phase but that the concentration of AsF{sub 5} in the vapor phase will exceed its liquid-phase concentration by a factor of about 7.5, which is in agreement with experimental data. Because the weight of the liquid phase in a condensation operation may be in the range of thousands of times that of the vapor phase, most of any AsF{sub 5} will be in the liquid phase in spite of this separation factor of 7.5. It may also be concluded that any arsenic fluorides fed into a uranium isotope separation plant will either travel with other low-molecular-weight gases or react with materials present in the plant. 25 refs., 3 figs., 6 tabs.
- Research Organization:
- Martin Marietta Energy Systems, Inc., Oak Ridge, TN (USA)
- Sponsoring Organization:
- DOE/NE
- DOE Contract Number:
- AC05-84OT21400
- OSTI ID:
- 7260379
- Report Number(s):
- K/ITP-270; ON: DE90008463
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
LIQUIDS
CHEMICAL COMPOSITION
URANIUM HEXAFLUORIDE
PHASE STUDIES
VAPORS
ARSENIC FLUORIDES
EQUILIBRIUM
IMPURITIES
THERMODYNAMIC PROPERTIES
VAPOR PRESSURE
ACTINIDE COMPOUNDS
ARSENIC COMPOUNDS
FLUIDS
FLUORIDES
FLUORINE COMPOUNDS
GASES
HALIDES
HALOGEN COMPOUNDS
PHYSICAL PROPERTIES
URANIUM COMPOUNDS
URANIUM FLUORIDES
050700* - Nuclear Fuels- Fuels Production & Properties