Imperial College London
Alternate

DrMarkWenman

Faculty of Engineering, Department of Materials

Reader in Nuclear Materials
 
 
 
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Contact

 

+44 (0)20 7594 6763m.wenman

 
 
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Location

 

B301aRoyal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Haynes:2023:10.1016/j.jnucmat.2023.154283,
author = {Haynes, TA and Battistini, A and Leide, AJ and Liu, D and Jones, L and Shepherd, D and Wenman, MR},
doi = {10.1016/j.jnucmat.2023.154283},
journal = {Journal of Nuclear Materials},
pages = {1--12},
title = {Peridynamic modelling of cracking in TRISO particles for high temperature reactors},
url = {http://dx.doi.org/10.1016/j.jnucmat.2023.154283},
volume = {576},
year = {2023}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - A linear-elastic computer simulation (model) for a single particle of TRISO fuel has been built using a bond-based peridynamic technique implemented in the finite element code ‘Abaqus’. The model is able to consider the elastic and thermal strains in each layer of the particle and to simulate potential fracture both within and between layers. The 2D cylindrical model makes use of a plane stress approximation perpendicular to the plane modelled. The choice of plane stress was made by comparison of 2D and 3D finite element models. During an idealised ramp to normal operating power for a kernel of 0.267 W and a bulk fuel temperature of 1305 K, cracks initiate in the buffer near to the kernel-buffer interface and propagate towards the buffer-iPyC coating interface, but do not penetrate the iPyC and containment of the fission products is maintained. In extreme accident conditions, at around 600% (1.60 W) power during a power ramp at 100% power (0.267 W) per second, cracks were predicted to form on the kernel side of the kernel-buffer interface, opposite existing cracks in the buffer. These were predicted to then only grow further with further increases in power. The SiC coating was predicted to subsequently fail at a power of 940% (2.51 W), with cracks formed rapidly at the iPyC-SiC interface and propagating in both directions. These would overcome the containment to fission gas release offered by the SiC ‘pressure vessel’. The extremely high power at which failure was predicted indicates the potential safety benefits of the proposed high temperature reactor design based on TRISO fuel.
AU  - Haynes,TA
AU  - Battistini,A
AU  - Leide,AJ
AU  - Liu,D
AU  - Jones,L
AU  - Shepherd,D
AU  - Wenman,MR
DO  - 10.1016/j.jnucmat.2023.154283
EP  - 12
PY  - 2023///
SN  - 0022-3115
SP  - 1
TI  - Peridynamic modelling of cracking in TRISO particles for high temperature reactors
T2  - Journal of Nuclear Materials
UR  - http://dx.doi.org/10.1016/j.jnucmat.2023.154283
UR  - https://www.sciencedirect.com/science/article/pii/S0022311523000533?via%3Dihub
UR  - http://hdl.handle.net/10044/1/101973
VL  - 576
ER  -
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