原子能科学技术2012，Vol.46Issue(z2)：819-825,7.
弥散型燃料板的辐照起泡机理分析
Analysis of Blistering Mechanism for Dispersion-Type Fuel Plates During Irradiation
高利军 1陈炳德 2姜胜耀 3肖忠 1俞冀阳 4张林 1李垣明2
作者信息
- 1. 清华大学工程物理系,北京 100084
- 2. 核反应堆系统设计技术重点实验室,四川成都610041
- 3. 中国核动力研究设计院,四川成都610041
- 4. 国家能源先进核燃料元件研发(实验)中心,四川成都610041
- 折叠
摘要
Abstract
Dispersion fuels are widely used in research reactors and power reactors. Blistering is a special failure mode for dispersion fuels, which can reduce the efficiency of thermal removal in the core and threaten the nuclear reactor safety. Based on the results of blistering of dispersion-type fuel plates during post-irradiation annealing experiments worldwide, the mechanism of blistering was studied both at the microscopic scale and at the macroscopic scale and the important blistering mode known as void interconnection, which consisted of three separate processes, was emphasized and elaborated. Using the proposed mechanism and assuming the estimation of the pressure caused by fission gas, the dimension of the round region which could induce blistering was calculated using mechanics method and the value of 1. 8 mm was gained, showing good consistency with the experimental observation. This work shows that the proposed void interconnection mechanism of blistering is closely related to the high burnup structure, swelling and cracking of fuel phase, fission fragment damage and stress corrosion cracking, which necessitates elasto-plastic and fracture mechanics calculation when establishing the blistering model.关键词
研究堆/弥散型燃料板/起泡/反应堆安全Key words
research reactor/ dispersion-type fuel plate/ blistering/ reactor safety分类
能源科技引用本文复制引用
高利军,陈炳德,姜胜耀,肖忠,俞冀阳,张林,李垣明..弥散型燃料板的辐照起泡机理分析[J].原子能科学技术,2012,46(z2):819-825,7.
