About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Accelerated Qualification of Nuclear Materials Integrating Experiments, Modeling, and Theories
|
Presentation Title |
Effects of Heterogeneous Porosity on Buffer Layer Fracture Mode |
Author(s) |
Abdullah M. Masri, Yongfeng Zhang, Aashique Rezwan, Claire Griesbach, Ramathasan Thevamaran, Tyler J Gerczak, Wen Jiang |
On-Site Speaker (Planned) |
Abdullah M. Masri |
Abstract Scope |
The buffer layer in TRISO fuel particles can fail stochastically by two modes: radial fracture and delamination, selection of which affects fission products release. Radial fracture is characterized by a through crack across the buffer. It is undesired as it facilitates fission product release. Delamination is characterized by debonding of the buffer and IPyC layers, and it is preferred as it retains an in-tact buffer layer to contain fission products. Informed by the experimentally characterized porosity, this work studies the effect of heterogeneous porosity on the fracture mode in buffer by coupling BISON fuel performance modeling with smeared cracking. The heterogeneous distribution of buffer porosity is represented by its average porosity, radial gradient, and random fluctuation. It was found that random fluctuation promotes nucleation of radial cracks, while an increase in average porosity and radial gradient promotes delamination. Such results can be used to help design more robust TRISO particles. |
Proceedings Inclusion? |
Planned: |
Keywords |
Nuclear Materials, Mechanical Properties, Modeling and Simulation |