高功率密度包层的热结构力学分析与优化  

THERMOMECHANICS ANALYSES AND OPTIMIZATION FOR THE HIGH POWER DENSITY BLANKET BFEB

作　　者：朱毓坤[1] 黄锦华[1] 胡刚[1] 霍铁军[1] 王晓宇[1] 

机构地区：[1]核工业西南物理研究院,成都610041

出　　处：《核聚变与等离子体物理》2003年第4期203-209,共7页Nuclear Fusion and Plasma Physics

基　　金：国家自然科学基金资助项目(19885001)

摘　　要：高功率密度包层BFEB是以混合堆FEB的堆芯参数和真空室尺寸为依据,设计用于嬗变核废物的。在工程设计阶段的构件结构力学分析时,首先进行了热结构力学的分析与优化。对包层模件,采用Pro ENGI NEER2000i2设计制图编码建立模型后,用Pro MECHANICA2000i2功能编码进行热结构力学分析,即稳态热分析和稳态热应力分析。在机械构件材料和气氦冷却状态确定的情况下,通过优化分析,减小了作用于包层构件的表面热负载的分布起伏,即减小裂变功率密度沿包层各区的分布起伏。通过增大氦冷却管板屏的拱弧曲率与圆角以及对其与氦汇流腔的焊接采用优化的深度电子束焊接工艺等优化措施后,计算结果表明:采用HT9铁素体钢制作的包层构件的最高温度为350℃,最大剪应力 80MPa。包层机械构件将具有良好的热结构力学安全裕度。Thermomechanics analyses, i.e., steady thermal analysis and static stress analysis, have been carried out for the structure of a high power density blanket, BFEB,with the Fusion Experimental Breeder, FEB, adopted as the reference reactor. The first wall heat loading is 0.5MW·m^-2 and the expectant average power density of the tritium breeder/transmutation medium is 50MW·m^-3. The blanket is cooled by 9 helium cooling tube panels. The ferritic steel HT9 is adopted as the structure material. We created structural models for the blanket BFEB in Pro/ENGINEER code, then carried out thermomechanics analyses in Pro/MECHANICA code. During the analyses, the distribution of power density in the blanket was optimized to be flatter by adopting the arched curvature and rounds of cooling tube panels less stiffness and the boundary condition at the interface of helium cooling tube panel and manifold chamber optimized using advanced welding processes with electron beam in a single pass. Consequently, a maximum temperature 350℃ and a maximum shear stress 79.4MPa for the helium cooling tube model have been obtained in the calculations.

关 键 词：热结构力学分析 功率密度 包层 聚变工程技术 氦冷却 

分 类 号：TL621[核科学技术—核技术及应用]