摘要
从磁流体动力学MHD压降的物理原理出发,对TCB(Tokamak Commercial Breeder)商用混合堆Li自冷包层的MHD流动方式进行了改进,提出了第一壁环向流动(平行环向磁场流动)、核燃料增殖区径向流动的MHD流动设计,以解决混合堆为改善堆的经济性而采取提高包层核燃料富集度的途径所带来的热工、MHD压降和安全问题。分析和数值计算结果表明,第一壁环向流动设计可以满足包层核燃料富集度从0.5%增加到1%、相应的热功率从4500MW增加到7900MW时来自MHD压降和热工设计要求,并且MHD压降和第一壁最高温度、第一壁结构材料与Li界面的最高温度都有裕量。该流动模型用于TETB(Tokamak Engineering Test Breeder)工程试验混合堆Li冷包层设计,可望堆系统在Li压力约为1.5MPa的工况下运行。
From magnetohydrodynamic (MHD) pressure drop principle, we have improved the MHD folw regime in Li self-cooled blanket of Tokamak Commercial Breeder (TCB). The MHD flow of the toroidal flow, i. e. the flow parallel to toroidal magnetic field direction, in the first wall and radial flow in the breeding zones have been designed so as to solve thermal hydraulics, MHD pressure drop and safety problems, Caused by increasing nuclear fuel concentration in blanket in order to improve breeder economics. Analyses and calculations indicate that the toroidal flow in the first wall and the radial flow in the breeding zones can satisfy the requirements of thermal hydraulic and MHD pressure drop when the nuclear fuel concentration in blanket increases from 0.5% to 1.0%, corresponding to thermal power range of 4500 to 7900 MW. The maximum MHD pressure drop, the maximum temperature of the first wall and the maximum temperature between first wall structural materials and liquid lithium allow a large of margin. if this flow model is applied to Tokamak Engineering Test Breeder (TETB) lithium self-cooled blanket design, TETB reactor can operate under pressure condition of 1.5 MPa.
出处
《核动力工程》
EI
CAS
CSCD
北大核心
1993年第6期523-527,共5页
Nuclear Power Engineering
关键词
混合堆
色层
MHD压降
TCB (Tokamak Commercial Breeder) Transition Reynolds number MHD pressure drop
