Desublimation of krypton from a noncondensable carrier gas

Technical Report · Fri Sep 01 04:00:00 EDT 1978

DOI:https://doi.org/10.2172/6824669· OSTI ID:6824669

Eby, R S

A study was conducted to obtain column concentration profiles and point buildup rates for a cold trap freezing out krypton from a nitrogen carrier gas stream and to compare those experimentally obtained profiles with profiles generated from a theoretical model. Profiles were obtained over a range of flow conditions from 0.14 to 1.06 standard cubic feet per minute, krypton feed gas concentrations varied from 5.2 to 13.5%, and cold trap operating temperatures from -281 to -312/sup 0/F. Gamma scintillation techniques using tracer amounts of krypton-85 provided the major analytical tool employed in the investigation. Data obtained from the experiments indicate that if values for the density and thermal conductivity of the krypton frost are known, the model can accurately predict krypton loading profiles in the cold trap. The frost density and frost conductivity appear to be functions of the freeze-out temperature and condensable krypton concentration. A discussion of cold trapping theory, a description of the experimental apparatus and tests performed, and an explanation of the usefulness of the model as a design tool for engineering use are included.

• Research Organization: Oak Ridge Gaseous Diffusion Plant, TN (USA)
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 6824669
• Report Number(s): K-1896
• Country of Publication: United States
• Language: English

Related Subjects

050800 -- Nuclear Fuels-- Spent Fuels Reprocessing
052001* -- Nuclear Fuels-- Waste Processing
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
COLD TRAPS
CONDENSERS
COUNTING TECHNIQUES
CRYOGENIC FLUIDS
DENSITY
EFFICIENCY
ELEMENTS
EVEN-ODD NUCLEI
FLUIDS
FUEL REPROCESSING PLANTS
GASEOUS WASTES
HOURS LIVING RADIOISOTOPES
INTERMEDIATE MASS NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
KRYPTON
KRYPTON 85
KRYPTON ISOTOPES
LOW TEMPERATURE
MANAGEMENT
MATHEMATICAL MODELS
NITROGEN
NONMETALS
NUCLEAR FACILITIES
NUCLEI
OFF-GAS SYSTEMS
PHYSICAL PROPERTIES
PROCESSING
RADIOACTIVE WASTE PROCESSING
RADIOISOTOPES
RARE GASES
REMOVAL
SCINTILLATION COUNTING
THERMAL CONDUCTIVITY
THERMODYNAMIC PROPERTIES
TRAPS
VAPOR CONDENSERS
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
YEARS LIVING RADIOISOTOPES