About this Abstract |
Meeting |
MS&T24: Materials Science & Technology
|
Symposium
|
Ceramic Materials for Nuclear Energy Systems
|
Presentation Title |
Advanced FCCI Barrier Coatings: Enhancing Fuel Cladding Performance Against Metallic Fuels at
High Temperatures |
Author(s) |
Sumit Bhattacharya, Shipeng Shu, Abdellatif M. Yacout |
On-Site Speaker (Planned) |
Sumit Bhattacharya |
Abstract Scope |
Fuel Cladding Chemical Interaction (FCCI) is an important phenomenon in metallic fuel based fast reactors, particularly at high temperatures and during off-normal conditions. Triggered by metal fuel expansion leading to contact with cladding, FCCI enables lanthanide fission product transport
into the cladding, reducing its load-bearing capacity and potentially compromising its integrity, especially at high temperatures (>650°C). This degradation can be exacerbated during operational transients above 700°C, where low-temperature uranium-iron eutectic phases can form. To mitigate FCCI effects, we've developed a Y2O3-based ceramic/metal multilayer coating
architecture, stable against high-temperature exposure to solid fission products and uranium, with a layer thickness of <10 μm. Our heavy ion irradiation studies confirmed the radiation resistance of these design. We present results from these FCCI barrier performance studies and demonstrate the uniform deposition of this coating barrier inside small diameter steel tubes typical of fast reactor cladding. |