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首页> 外文期刊>Annals of nuclear energy >Some peculiar features for kinetics of fission gas release from nuclear fuel on fast heating up
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Some peculiar features for kinetics of fission gas release from nuclear fuel on fast heating up

机译：快速加热时核燃料释放裂变气体动力学的一些独特特征

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摘要

This paper presents studies of some anomalies observed in kinetics of fission products based on the model of porous fuel. A nonmonotone two-peak structure of a fission product flux is shown to be determined by the effect of the system of open pores. It has been established that on heating, an explosive growth of a flux in the region of relatively high temperatures is associated with a high nonlinearity of the time dependence of phenomenological parameters describing a fission gas release from a solid phase. The analysis has been performed, of the processes accompanying a decay of a fission product solid solution. The possibility of a fuel material dispersion has been noted under the conditions of a fast reactivity accident due to a sharp rise of the gas phase pressure in the system of closed pores.
机译：本文介绍了基于多孔燃料模型对裂变产物动力学观察到的一些异常的研究。裂变产物通量的非单调两峰结构表明是由开孔系统的作用决定的。已经确定，在加热时，通量在相对高温的区域中的爆炸性增长与描述从固相释放裂变气体的现象学参数的时间依赖性的高度非线性有关。已经对伴随裂变产物固溶体衰减的过程进行了分析。由于密闭孔系统中气相压力的急剧上升，在快速反应事故的条件下已经注意到燃料材料可能扩散。

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