TY - JOUR
T1 - Thermal recovery of radiation defects and microstructural change in irradiated UO2fuels
AU - Nogita, Kazuhiro
AU - Une, Katsumi
N1 - Copyright:
Copyright 2016 Elsevier B.V., All rights reserved.
PY - 1993/9
Y1 - 1993/9
N2 - Thermal recovery of radiation defects and microstructural change in UO2fuels irradiated under LWR conditions (burnup: 25 and 44 GWd/t) have been studied after annealing at temperature range of 450-1,800°C by X-ray diffractometry and transmission electron microscopy (ТЕМ). The lattice parameter of as-irradiated fuels increase with higher burnup, which was mainly due to the accumulation of fission induced point defects. The lattice parameter for both fuels began to recover around 450-650°C with one stage and was almost completely recovered by annealing at 850°C for 5 h. Based on the recovery of broadening of X-ray reflections and ТЕМ observations, defect clusters of dislocations and small intragranular bubbles began to recover around 1,150-1,450°C. Complete recovery of the defect clusters, however, was not found even after annealing at 1,800°C for 5h. The effect of irradiation temperature on microstructural change of sub-grain structure in high burnup fuels was assessed from the experimental results.
AB - Thermal recovery of radiation defects and microstructural change in UO2fuels irradiated under LWR conditions (burnup: 25 and 44 GWd/t) have been studied after annealing at temperature range of 450-1,800°C by X-ray diffractometry and transmission electron microscopy (ТЕМ). The lattice parameter of as-irradiated fuels increase with higher burnup, which was mainly due to the accumulation of fission induced point defects. The lattice parameter for both fuels began to recover around 450-650°C with one stage and was almost completely recovered by annealing at 850°C for 5 h. Based on the recovery of broadening of X-ray reflections and ТЕМ observations, defect clusters of dislocations and small intragranular bubbles began to recover around 1,150-1,450°C. Complete recovery of the defect clusters, however, was not found even after annealing at 1,800°C for 5h. The effect of irradiation temperature on microstructural change of sub-grain structure in high burnup fuels was assessed from the experimental results.
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U2 - 10.1080/18811248.1993.9734564
DO - 10.1080/18811248.1993.9734564
M3 - Article
AN - SCOPUS:0027668158
VL - 30
SP - 900
EP - 910
JO - Journal of Nuclear Science and Technology
JF - Journal of Nuclear Science and Technology
SN - 0022-3131
IS - 9
ER -