Model of the formation and growth of a gas-filled cavity in boron carbide under irradiation

被引：0
|
作者：
Evdokimov, IA
Likhanskii, VV
Sorokin, AA
Khoruzhii, OV
机构：
[1] State Sci. Ctr. of the Russ. Fed., TRINITI
来源：
ATOMIC ENERGY | 2002年 / 93卷 / 03期
基金：
俄罗斯基础研究基金会;
关键词：
Oxide; Porosity; Carbide; Boron; Helium;
D O I：
10.1023/A:1021724201310
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
A model of the formation and growth of gas-filled pores in the cores of absorbing elements under neutron irradiation is described. The model is based on a definite similarity between the mechanisms of radiation damage in boron carbide and oxide fuel. For boron carbide, the key mechanism is radiation-stimulated coalescence of helium bubbles, which gives rise to the much larger swelling of boron carbide as compared with nuclear fuel. Regimes of the coalescence of helium bubbles as a function of the irradiation intensity, neutron spectrum, and radial position are investigated It is shown that the model describes qualitatively well the basic development of gas-filled porosity under irradiation in fast and thermal reactors.
引用
收藏
页码：749 / 758
页数：10
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