Interaction of silver and palladium with silicon carbide in HTGR fuel particles. Preliminary report
Fuel particles for the High-Temperature Gas-Cooled Reactor contained a layer of pyrolytic silicon carbide, which acts as a pressure vessel and provides containment for metallic fission products. The SiC layer is deposited by the thermal decomposition of methyltrichlorosilane (CH/sub 3/SiCl/sub 3/ or MTS) in an excess of hydrogen. Certain fission products, notably silver and palladium, can cause degradation of the SiC during irradiation. The purpose of this study is to develop a quantitative data base to better understand noble-metal attack as well as to evaluate the relationship between SiC deposition conditions and noble-metal release. The interaction between SiC and noble-metal fission product elements was investigated in the temperature range 1200 to 1500/sup 0/C.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 5137293
- Report Number(s):
- ORNL/TM-7393
- 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
360205 -- Ceramics
Cermets
& Refractories-- Corrosion & Erosion
CARBIDES
CARBON COMPOUNDS
CHEMICAL REACTIONS
COATED FUEL PARTICLES
DECOMPOSITION
FISSION PRODUCTS
FUEL PARTICLES
GAS COOLED REACTORS
GRAPHITE MODERATED REACTORS
HTGR TYPE REACTORS
ISOTOPES
MATERIALS
MICROSPHERES
PALLADIUM ISOTOPES
RADIOACTIVE MATERIALS
REACTOR MATERIALS
REACTORS
SILICON CARBIDES
SILICON COMPOUNDS
SILVER ISOTOPES
TEMPERATURE DEPENDENCE
210300* -- Power Reactors
Nonbreeding
Graphite Moderated
36 MATERIALS SCIENCE
360205 -- Ceramics
Cermets
& Refractories-- Corrosion & Erosion
CARBIDES
CARBON COMPOUNDS
CHEMICAL REACTIONS
COATED FUEL PARTICLES
DECOMPOSITION
FISSION PRODUCTS
FUEL PARTICLES
GAS COOLED REACTORS
GRAPHITE MODERATED REACTORS
HTGR TYPE REACTORS
ISOTOPES
MATERIALS
MICROSPHERES
PALLADIUM ISOTOPES
RADIOACTIVE MATERIALS
REACTOR MATERIALS
REACTORS
SILICON CARBIDES
SILICON COMPOUNDS
SILVER ISOTOPES
TEMPERATURE DEPENDENCE