STOICHIOMETRIC EFFECTS ON PERFORMANCE OF HIGH-TEMPERATURE GAS-COOLED REACTOR-FUELS FROM U-C-O SYSTEM

被引：50

作者：

HOMAN, FJ ^{[1
]}

LINDEMER, TB ^{[1
]}

LONG, EL ^{[1
]}

TIEGS, TN ^{[1
]}

BEATTY, RL ^{[1
]}

机构：

[1] OAK RIDGE NATL LAB,OAK RIDGE,TN 37830

来源：

NUCLEAR TECHNOLOGY | 1977年 / 35卷 / 02期

关键词：

D O I：

10.13182/NT35-428

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：

Two fuel failure mechanisms are identified for coated particle fuels that are directly related to fuel kernel stoichiometry. These mechanisms are thermal migration of the kernel through the coating layers and chemical interaction between rare-earth fission products and the silicon carbide (SiC) layer (the primary barrier to diffusion of metal fission products out of the particle) leading to failure of the SiC layer. Thermal migration appears to be most severe for oxide fuels, while chemical interaction is most severe with carbide systems. Thermodynamic calculations indicate that oxide-carbide fuel kernels may permit a stoichiometry that reduces both problems to manageable levels for currently planned high-temperature gas-cooled reactors.

引用

页码：428 / 441

页数：14