27 September 2010 to 1 October 2010
CSIR Convention Centre
Africa/Johannesburg timezone

THE EFFECT OF SILICON CARBIDE CRYSTAL STRUCTURE TRANSFORMATION ON GASEOUS FISSION PRODUCT RELEASE FROM THE TRISO COATED PARTICLE OF THE PEBBLE BED MODULAR REACTOR’S FUEL PEBBLE

Not scheduled
CSIR Convention Centre

CSIR Convention Centre

CSIR, Pretoria
Poster Track F - Applied and Industrial Physics

Speaker

Mr Mosebetsi Leotlela (University of Witwatersrand)

Description

The effectiveness of silicon carbide (SiC) to act as a barrier to migration of gaseous fission products (FP) through the (Tri-Isotropic) TRISO coated particle out of the fuel pebble depends on its ability to maintain its crystal structure. However, analyses of irradiated fuel pebbles indicate that the crystal structure of the SiC is greatly affected by the duration of irradiation, irradiation temperature and the neutron flux of the reactor causing the crystal structure to undergo structural changes (amorphisation), changing from α-SiC to β-SiC. The diffusion of fission products through the SiC layer of the TRISO coated has been found to follo

Primary author

Mr Mosebetsi Leotlela (University of Witwatersrand)

Presentation Materials

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