|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Materials and Fuels for the Current and Advanced Nuclear Reactors V
||Microstructural Development and Phase Transformations in Hot Isostatic Pressed Monolithic U-Mo Fuel Plates in AA6061 Cladding with Zr Diffusion Barrier
||Youngjoo Park, Nicholas Eriksson, Dennis D. Keiser, Yongho Sohn
|On-Site Speaker (Planned)
Monolithic U-10 wt.% Mo (U10Mo) fuel is being developed for low-enriched fuel for the US Material Management and Minimization Program. A hot isostatic pressing (HIP) process was employed to fabricate monolithic fuel plates encased in AA6061 cladding with a Zr diffusion barrier as functions of HIP temperature, time, ramping and cooling rate. The U10Mo/Zr interaction layer after hot-rolling prior to HIP consisted of α-U, Mo2Zr and UZr2, however their growth was negligible by the HIP process. During HIP, the growth of (Al,Si)3Zr layer at the AA6061/Zr interface was observed with an activation energy of 457 kJ/mole. The decomposition of γ-U10Mo fuel alloy into α-U and γ’-U2Mo occurred as predicted by the time-temperature-transformation diagram of U10Mo. UC and UO2 inclusions formed during the casting of U-Mo were associated with the limited interdiffusion and reaction with Zr barrier. The chemical bands of oxygen- and nitrogen-rich phases were observed within AA6061 particle boundaries.
||Planned: A print-only volume