| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Ceramics and Ceramic-based Composites for Nuclear Fission Applications
|
| Presentation Title |
Using In Situ Neutron Powder Diffraction to Study the Thermal Expansion of Fission Product Doped UN |
| Author(s) |
Melody Ranger, Jennifer H Stansby, Faris B Sweidan, James R Hester, Patrick A Burr, Denise Adorno Lopes, Vanessa K Peterson, Pär Olsson, Edward G Obbard |
| On-Site Speaker (Planned) |
Melody Ranger |
| Abstract Scope |
UN fuel is being qualified for use in advanced reactors, such as Sweden's SUNRISE lead-cooled reactor. UN doped with Zr, Nb, Mo and Ru at 1, 1.5 and 2 at% each were used to research the effect of fission product solutes and second phases on the thermal expansion of UN at high temperature. Doping with a single solute at 10 at% was also explored to isolate separate effects of each fission product on the thermal expansion. Samples were heated to 1000°C with in situ neutron powder diffraction to determine real time physical and chemical evolution. 10 at% Zr is fully soluble, while Mo, Nb and Ru second phases are observed in UN. Adding 10 at% Mo in UN decreases lattice expansion over the 950°C temperature range by 0.003363 ± 0.001606 Å. The thermal expansion coefficients, phase fractions, and UN occupancies are reported for each sample over the studied temperature range. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Nuclear Materials, |