Published October 1973 | Version v1
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The Permeability of Silicon Carbide Coatings to Fission Products

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Description

The migration of fission products through the polycrystalline silicon carbide coatings of HTR fuel particles has been studied in laboratory experiments and the release coefficients related to the silicon carbide formation conditions. The ''optimum'' material is entirely satisfactory as the principal fission product barrier for first-generation power HTRs. In reactor service at very high temperature, on the other hand, the release of an unexpected isotope, Ag-110m, often predominates, and possible reasons for this are considered. (author)

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Publishing Information

Imprint Pagination
30 p.
Report number
DP-R--856

INIS

Country of Publication
United Kingdom
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
54039615
Subject category
S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
Descriptors DEI
COATINGS; DIFFUSION BARRIERS; FEDERAL REPUBLIC OF GERMANY; FISSION PRODUCTS; FORSCHUNGSZENTRUM JUELICH; FUEL PARTICLES; HTGR TYPE REACTORS; PERMEABILITY; POLYCRYSTALS; SILICON CARBIDES; SILVER 110; TEMPERATURE RANGE 1000-4000 K
Descriptors DEC
BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; CARBIDES; CARBON COMPOUNDS; CRYSTALS; DAYS LIVING RADIOISOTOPES; DEVELOPED COUNTRIES; ELECTRON CAPTURE RADIOISOTOPES; EUROPE; GAS COOLED REACTORS; GERMAN FR ORGANIZATIONS; GRAPHITE MODERATED REACTORS; INTERMEDIATE MASS NUCLEI; ISOMERIC TRANSITION ISOTOPES; ISOTOPES; MATERIALS; NATIONAL ORGANIZATIONS; NUCLEI; ODD-ODD NUCLEI; PHYSICAL PROPERTIES; RADIOACTIVE MATERIALS; RADIOISOTOPES; REACTORS; SECONDS LIVING RADIOISOTOPES; SILICON COMPOUNDS; SILVER ISOTOPES; TEMPERATURE RANGE; WESTERN EUROPE

Optional Information

Notes
Document from Juelich Preservation Project; 8 refs., 15 figs., 2 tabs.