摘要
对辐照后燃料板进行退火试验,用显微镜观察了UO2颗粒的微观形貌随着温度的升高的变化情况。在高温下裂变气体膨胀,在UO2颗粒内气孔贯通形成裂纹穿破涂层,引起UO2颗粒局部破碎脱落,UO2涂层外的反应层由于高温加剧的扩散反应还形成了明显的孔洞。
The blister annealing has been performed on UO2 dispersed fuel plate under various tempera-ture conditions.The microstructure of UO2 particles changing with the rise of temperature is studied by using the microscope.Fission gas releases at high temperature and the bubbles burst the coat to generate cracks and result in the local fracture and fall off of UO2 particles.A lot of holes occur in the reaction layer outside of UO2 coat because of the diffusion reaction intensified by the high temperature.
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2012年第1期74-77,共4页
Nuclear Power Engineering
基金
四川省青年基金(08ZQ026-024)
关键词
弥散燃料
辐照
高温失效
显微形貌
Dispersed fuel
Irradiation
High temperature failure
Microstructure
