Design and Preparation of SiC-ZrC Composite Coating Layers by FB-CVD Used in TRISO Coated Fuel Particles - 18417

Conference · Tue Nov 15 00:00:00 EST 2016

OSTI ID:23032632

Liu, Rongzheng; Liu, Malin; Chang, Jiaxing; Shao, Youlin; Liu, Bing ^[1]

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1. Institute of Nuclear and New Energy Technology, Collaborative Innovation Center of Advanced Nuclear Energy Technology, Tsinghua University, Beijing, 100084, China (China)

Tri-structural-isotropic (TRISO) particle has been successful in high temperature gas cooled reactor (HTGR), but an improved design is required for future development. In this paper, two alternative designs of TRISO particle are proposed by introducing ZrC to the coating layers. One design is to add an individual ZrC layer between the inner PyC layer and the SiC layer. Another design is to construct a periodic coating layer with the repeated sequence of SiC/SiC-ZrC by doping pulsed ZrCl{sub 4} at proper time intervals during the SiC preparation process. The designed coating layers were successfully prepared on the ZrO{sub 2}/buffer/IPyC particles by the fluidized bed chemical vapor deposition (FB-CVD) method. Microstructures and characterizations of the composite coating layers were given based on XRD, SEM, EDX and Raman scattering analysis. By controlling the pulse parameter, the grain size of SiC is significantly decreased which means doping ZrCl{sub 4} can interrupt normal growth of SiC crystals. (authors)

• Research Organization: American Nuclear Society - ANS, 555 North Kensington Avenue, La Grange Park, IL 60526 (United States)
• OSTI ID: 23032632
• Resource Relation: Conference: HTR 2016: International Topical Meeting on High Temperature Reactor Technology, Las Vegas, NV (United States), 6-10 Nov 2016; Other Information: Country of input: France; 10 refs.; available from American Nuclear Society - ANS, 555 North Kensington Avenue, La Grange Park, IL 60526 (US)
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
36 MATERIALS SCIENCE
CHEMICAL VAPOR DEPOSITION
COATED FUEL PARTICLES
COATINGS
CRYSTALS
FLUIDIZED BEDS
GRAIN SIZE
HTGR TYPE REACTORS
PERIODICITY
PULSES
RAMAN EFFECT
REACTOR DESIGN
SCANNING ELECTRON MICROSCOPY
SILICON CARBIDES
X-RAY DIFFRACTION
ZIRCONIUM CARBIDES
ZIRCONIUM CHLORIDES
ZIRCONIUM OXIDES