摘要
下管座作为燃料组件的重要构件,主要作用是支撑、定位燃料组件。同时也是燃料组件的冷却剂入口,对于闭式流道结构的燃料组件,若入口未能经过充分整流,冷却剂将无法均匀分配至燃料组件各子通道,当各子通道之间的流量差异达到一定程度时,燃料元件两侧将出现压力波动,造成燃料元件长期受力不均或流致振动,可能会对燃料组件的结构完整性和运行安全构成威胁,因此下管座流量分配均匀性,是下管座设计的一个重要指标。
As an important component,supporting and orienting the fuel assembly, the bottom nozzle is also the coolant inlet. For the closed-flow-channel fuel assembly,the coolant will not be distributed into the sub-channels uniformly if the coolant is not adjusted sufficiently by the bottom nozzle.The pressure fluctuation will be observed when the flux difference between the subchannels reaches at some extent. This phenomenon will cause the uneven force distribution and the flow-vibrate,which may have an influence on the structure integrality and the operation security.Therefore,the uniformly flux distribution,is a key parameter of the design of the bottom nozzle.
出处
《科技创新导报》
2015年第21期123-125,共3页
Science and Technology Innovation Herald
关键词
反应堆
燃料组件
下管座
闭式流道
Reactor
Fuel assembly
Bottom nozzle
Closed-Flow-Channel
