TY - GEN
T1 - Optimization of fracture strength tests for the SIC layer of coated fuel particles by finite element analysis
AU - Kim, Jin Weon
AU - Byun, Thak Sang
AU - Katoh, Yutai
PY - 2010
Y1 - 2010
N2 - Extended finite element (FE) analysis has been performed to optimize the fracture strength tests for SiC coating layer of tri-isotropic (TRISO) fuel particles. Since the SiC layer is a thin spherical shell that sustains most of the internal pressure from fission gas release and other internal expansions, obtaining accurate mechanical property data has been required for design optimization and performance assessment of the fuel. A crush testing technique for hemispherical shell SiC specimens has been newly developed, in which a metallic foil is inserted between the SiC specimen and the loading plunger to produce adequate stress distribution in the specimen. The present FE analysis aimed at finding proper material and thickness for the metallic insert, and detailed parametric studies were performed for insert material and thickness. The results could suggest optimum loading configurations that can provide sufficient uniformly stressed area, on which the reliability of fracture strength data is dependent. Fracture tests were conducted for model specimens, following the suggested details of loading configuration. The results demonstrated that the suggested loading configuration produced reliable fracture strength data for the SiC coating layer of TRISO fuel particles.
AB - Extended finite element (FE) analysis has been performed to optimize the fracture strength tests for SiC coating layer of tri-isotropic (TRISO) fuel particles. Since the SiC layer is a thin spherical shell that sustains most of the internal pressure from fission gas release and other internal expansions, obtaining accurate mechanical property data has been required for design optimization and performance assessment of the fuel. A crush testing technique for hemispherical shell SiC specimens has been newly developed, in which a metallic foil is inserted between the SiC specimen and the loading plunger to produce adequate stress distribution in the specimen. The present FE analysis aimed at finding proper material and thickness for the metallic insert, and detailed parametric studies were performed for insert material and thickness. The results could suggest optimum loading configurations that can provide sufficient uniformly stressed area, on which the reliability of fracture strength data is dependent. Fracture tests were conducted for model specimens, following the suggested details of loading configuration. The results demonstrated that the suggested loading configuration produced reliable fracture strength data for the SiC coating layer of TRISO fuel particles.
UR - http://www.scopus.com/inward/record.url?scp=77951998938&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:77951998938
SN - 9780470457603
T3 - Ceramic Engineering and Science Proceedings
SP - 149
EP - 159
BT - Ceramics in Nuclear Applications - A Collection of Papers Presented at the 33rd International Conference on Advanced Ceramics and Composites
T2 - Ceramics in Nuclear Applications - 33rd International Conference on Advanced Ceramics and Composites
Y2 - 18 January 2009 through 23 January 2009
ER -