电加热元件的结构和热物性对瞬态热工水力实验的影响  

Effect of structure and thermal properties of the electrically heated rod on transient thermal-hydraulic experiment

作　　者：吴小航[1] 傅霄华[1] 

机构地区：[1]中国核动力研究设计院空泡物理和自然循环重点实验室,四川成都610041

出　　处：《核科学与工程》2004年第3期235-241,共7页Nuclear Science and Engineering

摘　　要：在热工水力实验中普遍使用电加热元件替代核燃料元件。然而 ,由于两者在结构以及材料热物性等方面存在差异 ,在稳态时核燃料元件与电加热元件的温度分布和储能不同 ,而在瞬态过程中两者热工水力响应不同。针对这一情况 ,首先分析了电加热元件与核燃料元件结构和热物性不同对实验的影响 ,然后介绍了减少这种差别的一种可行方法———功率控制法 。The electrically heated rod is usually used as a s ubstitute for fuel rod in thermal-hydraulic experiment. However, the different structure and thermal properties between nuclear fuel rod and electrically heate d rod result in different steady-state distribution of temperature and stored e nergy and different response to thermal-hydraulic in simulation transient exper iment. This paper analyses the effect of structure and thermal properties differ ences between nuclear fuel rod and electrically heated rod on experiment, and th en introduce a feasible method, i.e. electric power is controlled by a program, to reduce the differences between the transient responses of nuclear fuel rod an d electrically heated rod. At the same time, this paper points out the limi ts of the method.

关 键 词：热工水力 核燃料 瞬态 响应 电加热元件 热物性 用电 情况 差别 储能 

分 类 号：TL33[核科学技术—核技术及应用] TU522.05[建筑科学—建筑技术科学]