|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Advanced Characterization and Modeling of Nuclear Fuels: Microstructure, Thermo-physical Properties
||The Effect of the Proton Irradiation Dose Rate on the Evolution of Microstructure in Zr Alloys: A Synchrotron Micro-beam X-ray and TEM Study
||Ömer Koç, Rhys Thomas, Tamas Ungár, Zoltan Hegedues, Robert Harrison, Michael Preuss, Philipp Frankel
|On-Site Speaker (Planned)
Protons are used as surrogate to neutrons for studying the radiation damage on the zirconium utilised for fuel assemblies. One benefit of using protons is the possibility of significantly shorter irradiation times needed to achieve comparable neutron irradiation fluences. However, the accelerated damage rate needs to be compensated by using an increased irradiation temperature to enhance diffusion processes. In order to investigate the effect of these differences, we have proton irradiated recrystallised Low-Sn ZIRLO and Zircaloy-2 specimens to 0.1dpa at 320oC applying three different dose rates. Synchrotron-based x-ray microbeam depth profiling in 30µm deep irradiated regions was carried out for line profile analysis leading to dislcation density determination. The results are compared to dislocation analysis carried out by (S)TEM. The combined analysis of the two techniques has enabled to draw a better picture of the damage evolution for different damage accumulation rates during the early stages of irradiation.
||Characterization, Nuclear Materials, Other