放射性裂变产物由燃料芯块释放到一回路的影响因素研究  

Analysis of Effects on Radioactive Fission Product Release from Fuel Pellet to Coolant

作　　者：景福庭[1] 陈炳德[1] 杨洪润[1] 吕焕文[1] 

机构地区：[1]中国核动力研究设计院核反应堆系统设计技术重点实验室,成都610041

出　　处：《核动力工程》2013年第2期79-82,共4页Nuclear Power Engineering

摘　　要：采用PROFIP5程序分析燃料棒线功率密度、衰变常数和破口尺寸等对放射性裂变产物释放的影响。结果表明:当燃料棒中心温度低于1000℃时,裂变产物的释放份额与燃料棒温度无关;当燃料棒中心温度高于1000℃时,燃料棒温度越高,裂变产物的释放份额越大;燃料棒线功率密度越高,衰变常数对释放份额的影响越明显。PROFIP5 was used to analyze the effects of linear heat rate, decay constant and defect size on fission product fraction release. Conclusions about fission product release were drawn： at temperature below 1000℃, the release fractions are independent of temperature; at temperature above 1000℃, the release fractions increase with the temperature; For the same chemical species, the release fractions decrease as the decay constants increase, and this phenomenon is more obvious as the linear heat rate increases.

关 键 词：放射性裂变产物 燃料芯块 释放 影响因素 

分 类 号：TL352.27[核科学技术—核技术及应用]