Fission product release and microstructure changes during laboratory annealing of a very high burn-up fuel specimen
Fission product release and microstructure changes during laboratory annealing of a very high burn-up fuel specimen
复制标题
极高燃耗燃料样品实验室退火过程中裂变产物的释放和微观结构的变化
DOI：
10.1016/j.jnucmat.2008.03.006
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发表时间：
2008
影响因子：
3.1
通讯作者：
R. Konings
中科院分区：
文献类型：
--
作者：
J. Hiernaut;T. Wiss;J. Colle;H. Thiele;C. Walker;W. Goll;R. Konings
局部燃耗约为240 MWd/kgHM的商用压水堆燃料样品在努森电池质谱仪系统中以10 K/min的加热速率进行退火，直至2750 K，在该温度下样品完全蒸发。裂变气体和裂变产物的释放作为温度的函数进行了研究。在其中一次试验中，在900、1500和1860 K下连续中断加热，并且在每一步中，通过SEM检查样品的小碎片，并通过能量色散电子探针显微分析进行分析。介绍了易挥发的、气态的和其他挥发性较小的裂变产物的释放行为，并用CNOUS程序进行了分析，并与燃料的结构变化有关。
A commercial PWR fuel sample with a local burn-up of about 240MWd/kgHM was annealed in a Knudsen cell mass spectrometer system with a heating rate of 10K/min up to 2750K at which temperature the sample was completely vaporized. The release of fission gases and fission products was studied as a function of temperature. In one of the runs the heating was interrupted successively at 900, 1500 and 1860K and at each step a small fragment of the sample was examined by SEM and analysed by energy dispersive electron probe microanalysis. The release behaviour of volatile, gaseous and other less volatile fission products is presented and analysed with the EFFUS program and related to the structural changes of the fuel.