Silver transport in H-451 graphite
Conference
·
OSTI ID:5691068
Diffusion profiles have been measured for silver in hollow and solid cylinders in the temperature range 490 to 800/sup 0/C. The profiles show two components of diffusion. There is a high concentration, relatively immobile zone near the surface and a low concentration, rapidly moving component deeper into the sample. The rapid component is well fitted by the diffusion equation when irreversible trapping is assumed. The diffusion coefficients determined by least-square analysis of the profiles can be represented by D (m/sup 2//sec) = 17.4 exp (-22,100/T). Excessive scatter was seen in the trapping coefficients determined from the profiles. This is believed to be due to varying amounts of impurities in the different samples. A limited number of desorption measurements were performed for silver from H-451 graphite. Evidence of Elovich-type behavior was noted.
- Research Organization:
- Oak Ridge National Lab., TN (USA); Virginia Univ., Charlottesville (USA)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 5691068
- Report Number(s):
- CONF-811141-3; ON: DE82004050
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
210300 -- Power Reactors
Nonbreeding
Graphite Moderated
36 MATERIALS SCIENCE
360603* -- Materials-- Properties
CARBON
DIFFUSION
ELEMENTS
GAS COOLED REACTORS
GRAPHITE
GRAPHITE MODERATED REACTORS
HTGR TYPE REACTORS
MASS TRANSFER
MATERIALS
METALS
NONMETALS
REACTOR MATERIALS
REACTORS
SILVER
SORPTIVE PROPERTIES
SURFACE PROPERTIES
TEMPERATURE DEPENDENCE
TRANSITION ELEMENTS
210300 -- Power Reactors
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Graphite Moderated
36 MATERIALS SCIENCE
360603* -- Materials-- Properties
CARBON
DIFFUSION
ELEMENTS
GAS COOLED REACTORS
GRAPHITE
GRAPHITE MODERATED REACTORS
HTGR TYPE REACTORS
MASS TRANSFER
MATERIALS
METALS
NONMETALS
REACTOR MATERIALS
REACTORS
SILVER
SORPTIVE PROPERTIES
SURFACE PROPERTIES
TEMPERATURE DEPENDENCE
TRANSITION ELEMENTS