Cover-gas and air buoyancy correction for the gravimetric analysis of uranium in uranium hexafluoride

Technical Report · Sun Mar 01 04:00:00 EST 1981

DOI:https://doi.org/10.2172/6591960· OSTI ID:6591960

Hedge, W D

The gravimetric analysis of uranium (U) in uranium hexafluoride (UF/sub 6/) necessitates subsampling UF/sub 6/ by transferring an aliquot of liquid UF/sub 6/ through a vacuum manifold to a fluorothene sample vial. The aliquot of UF/sub 6/ is frozen into the vial by cooling with liquid air. Once frozen, a cover-gas is admitted to the vacuum manifold and the vial. The vial is then removed in the cover-gas atmosphere and sealed with a nut-plug-gasket assembly. The cover-gas is admitted to prevent exposure of the frozen UF/sub 6/ to moisture in the atmosphere, and the weight of the cover-gas must be considered as part of the gross weight, but not as part of the net weight of the UF/sub 6/ within the vial. An air buoyancy correction is also applied to correct for the air displacement of the brass weight equivalents used in obtaining the UF/sub 6/ net weight.

• Research Organization: Oak Ridge Gaseous Diffusion Plant, TN (USA)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA), Nuclear Criticality Safety Program (NCSP)
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 6591960
• Report Number(s): K/TL/AT-40
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102* -- Chemical & Spectral Procedures
ACTINIDE COMPOUNDS
ACTINIDES
CHEMICAL ANALYSIS
CORRECTIONS
COVER GAS
ELEMENTS
FLUIDS
FLUORIDES
FLUORINE COMPOUNDS
FREEZING
GASES
GRAVIMETRIC ANALYSIS
HALIDES
HALOGEN COMPOUNDS
INERT ATMOSPHERE
METALS
Nuclear Criticality Safety Program (NCSP)
QUANTITATIVE CHEMICAL ANALYSIS
URANIUM
URANIUM COMPOUNDS
URANIUM FLUORIDES
URANIUM HEXAFLUORIDE