摘要
核电站反应堆内的保温材料由于长时间受到高温、中子辐照等因素的作用,性能会明显劣化,为了保证反应堆安全运行,研究其辐照性能十分必要。本文对秦山核电站提供的国产纤维布材料进行不同剂量水平的加速辐照,设计加工了一套带精确控温系统的辐照装置,保证辐照期间样品的温度为设定温度。通过研究不同温度对未辐照保温纤维布拉伸性能的影响,得出高温环境下其断裂强力有一定程度的下降。利用扫描电镜(SEM)等微观分析手段,分析了辐照剂量及温度对该纤维布结构和成分的作用。显微分析结果表明,经受过高温辐照考验后材料的成分含量、晶体结构均未发生明显变化,不同的试验温度会令样品断口产生一定差异。
Due to high temperature and neutron irradiation,the performance of insulation material in nuclear reactor is significantly degraded.It must be replaced after a period of time.In order to extend the life of insulation material under normal operation of the nuclear reactor,it is necessary to study the irradiation performance.In the work,the fiber cloths from Qinshan Nuclear Power Plant were irradiated with different doses.The irradiation equipment with temperature control was designed and completed in order to ensure irradiation temperature as set temperature.The effect of temperature on tensile property of un-irradiated insulation material was studied.The mechanical property has different degrees of decline under high temperature.By using of SEM,the effects of irradiation on structure and composition were also studied.The results show that thecomposition and microstructure of insulation material have no significant change,but microstructures are different among samples under different conditions.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2014年第S1期523-527,共5页
Atomic Energy Science and Technology
基金
国家重点基础研究发展计划资助项目(2011CB610503)
大型先进压水堆核电站重大专项资助项目(2012ZX06004-005
2011ZX06004-002)
关键词
保温材料
辐照考验
拉伸性能
SEM
insulation material
irradiation test
tensile property
SEM
