Peridynamic modelling of cracking in TRISO particles for high temperature reactors
نویسندگان
چکیده
A linear-elastic computer simulation (model) for a single particle of TRISO fuel has been built using bond-based peridynamic technique implemented in the finite element code ‘Abaqus’. The model is able to consider elastic and thermal strains each layer simulate potential fracture both within between layers. 2D cylindrical makes use plane stress approximation perpendicular modelled. choice was made by comparison 3D models. During an idealised ramp normal operating power kernel 0.267 W bulk temperature 1305 K, cracks initiate buffer near kernel-buffer interface propagate towards buffer-iPyC coating interface, but do not penetrate iPyC containment fission products maintained. In extreme accident conditions, at around 600% (1.60 W) during 100% (0.267 per second, were predicted form on side opposite existing buffer. These then only grow further with increases power. SiC subsequently fail 940% (2.51 W), formed rapidly iPyC-SiC propagating directions. would overcome gas release offered ‘pressure vessel’. extremely high which failure indicates safety benefits proposed reactor design based fuel.
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ژورنال
عنوان ژورنال: Journal of Nuclear Materials
سال: 2023
ISSN: ['1873-4820', '0022-3115']
DOI: https://doi.org/10.1016/j.jnucmat.2023.154283