| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Behavior and Degradation of Advanced Nuclear Fuel and Structural Materials
|
| Presentation Title |
Mesoscale Modeling of the Relationships between Microstructure and Mechanical Properties in the Porous Pyrocarbon Buffer Layer for TRISO Particle Fuel |
| Author(s) |
Mohammed Gomaa Abdoelatef, Claire Griesbach , Kumar Sridharan , Ramathasan Thevamaran, Gerczak Tyler, Wen Jiang, karim Ahmed |
| On-Site Speaker (Planned) |
Mohammed Gomaa Abdoelatef |
| Abstract Scope |
TRISO particle fuel is a leading nuclear fuel for several advanced reactors. TRISO exhibit high performance but occasionally fail because of the fracture and degradation of the porous pyrocarbon buffer layer. A combined phase-field and finite-element mesoscale modeling approach has been developed to correlate microstructure and mechanical properties of this buffer layer. 3D experimental characterization and atomistic scale modeling were utilized to both inform and validate the mesoscale model. The model accounts for the change of the layer’s elastic and fracture properties with microstructure, temperature, and irradiation conditions. The modeling results demonstrate a strong dependence of the mechanical properties on the fraction, size, and morphology of pores in the buffer layer. Parametric studies and sensitivity analysis were employed to assess uncertainty. This work is a part of our combined experimental and computational multiscale effort for quantifying and correlating buffer microstructure with mechanical properties towards a more robust TRISO fuel particle. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Computational Materials Science & Engineering, Nuclear Materials, |