Key scientific issues related to the evolution of spent nuclear fuel in long term dry storage and geological disposal

被引：0
|
作者：
Poinssot, C [1 ]
Ferry, C [1 ]
Gras, JM [1 ]
机构：
[1] CEA Saclay, Nucl Energy Div, Dept Phys & Chem, Serv Study Radionuclide Behav, F-91191 Gif Sur Yvette, France
来源：
SCIENTIFIC BASIS FOR NUCLEAR WASTE MANAGEMENT XXVII | 2004年 / 807卷
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D O I：
暂无
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The anticipated long term evolution of spent nuclear fuel as well as the remaining scientific key issues are presented for the various boundary conditions that can be encountered in long term dry storage and geological disposal. Spent fuel is expected to evolve significantly in closed system conditions which are representative of long term dry storage and the first stages of geological disposal. The mechanical evolution of the grain boundaries, the fate of helium and the evolution of the RN location within the pellet are the three major questions to be addressed which could significantly modify the physical and chemical state of the fuel. In addition, mechanisms and kinetics of fuel alteration by water in deep geological repository are still to be more deeply understood, in particular the inventory of the instant release and the radiolytic dissolution processes, to get a robust and reliable source term.
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页码：29 / 34
页数：6
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