Modeling and parametric studies of the effect of inhomogeneity on fission gas release in LWR MOX fuel

被引：10

作者：

Koo, YH ^{[1
]}

Lee, BL ^{[1
]}

Cheon, JS ^{[1
]}

Sohn, DS ^{[1
]}

机构：

[1] Korea Atom Energy Res Inst, Taejon 305600, South Korea

来源：

ANNALS OF NUCLEAR ENERGY | 2002年 / 29卷 / 03期

关键词：

D O I：

10.1016/S0306-4549(01)00035-4

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：

To analyze the effect of an inhomogeneous mixture of an PuO2 powder on fission gas release in MOX fuel, a model has been developed using the assumption that gas release mechanism in Pu-rich particles is identical with that in. UO2 fuel. A parametric study was performed to see the respective effect of the number density, size and fraction of Pu retained in the Pu-rich particles on gas release in MOX fuel. The model shows that, for the condition of all the other remaining parameters being fixed, more gas is released in a MOX fuel for lower number density of, smaller size of, and larger fraction of Pu retained in, the Pu-rich particles. However, there exists some condition or combination of parameters for which the effect of inhomogeneity on gas release is negligible depending on the characteristics of MOX fuel. Comparison with measured data for OCOM MOX fuel shows that the present model can predict the level of gas release in MOX fuel once the release mechanism in the Pu-rich particles is known. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：271 / 286

页数：16

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