About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Computational Materials Science and Engineering of Materials in Nuclear Reactors
|
Presentation Title |
Zirconium Alloy Cladding Burst Mechanisms under LOCA with Burnup Extension |
Author(s) |
Jianguo Yu, Cole Blakely, Hongbin Zhang |
On-Site Speaker (Planned) |
Hongbin Zhang |
Abstract Scope |
Extending the authorized fuel burnup level to the proposed new limit of 75 GWD/MT can provide significant economic benefits to enhance the commercial competitiveness of the current fleet of operating light water reactors (LWRs). However, to ensure the integrity of fuel rods with high burnup fuel, there are still a number of technological challenges posed by higher burnups that need to be remedied. One of the main obstacles associated with burnup extension is the fuel rod behavior such as burst during design basis accident (DBA) condition analyses, especially for large-break loss-of-coolant (LBLOCA) and reactivity insertion accident (RIA). In this work, fuel rod burst mechanisms with the proposed new burnup limit under the LBLOCA conditions are investigated using the advanced fuel performance code Bison. Results for four fuel rod burst criteria will be presented in this comparative study: overstrain, plasticity instability (PI), overstress (OS), and combination of OS/PI. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |