径向步进倒料行波堆的渐近态特性研究  

Research on the Asymptotic States of a Radial Step-shuffling Traveling Wave Reactor

作　　者：张大林[1] 安洪振[2] 田文喜[1] 秋穗正[1] 苏光辉[1] 

机构地区：[1]西安交通大学核科学与技术学院,西安710049 [2]环境保护部核与辐射安全中心,北京100082

出　　处：《科学技术与工程》2014年第6期9-12,共4页Science Technology and Engineering

基　　金：国家自然科学基金(11105103)资助

摘　　要：基于行波堆的原理提出了径向步进倒料行波堆的概念,并将其与典型钠冷快堆的设计相结合,采用数值方法对由外向内的径向步进行波堆渐近稳态特性进行了研究。计算结果表明:渐近keff随倒料周期近似呈抛物线型分布,而渐近燃耗呈线性增长,满足临界条件的倒料周期中最大燃耗可达到53 at%;堆芯功率峰随着倒料周期的增长,从燃料卸出区(堆芯中心)向燃料导入区(堆芯外围)移动,功率峰因子随倒料周期先快速降低,后缓慢降低达到稳定。Based on the mechanism of traveling wave reactor,a concept of radial step-shuffling traveling wave reactor is proposed.It is combined with the typical design of sodium-cooled fast reactors,the asymptotic characteristics of the inwards step-shuffling of which was studied numerically.The calculated results show that the asymptotic keff parabolically varies with the shuffling period,while the burn-up increases linearly.The highest burn-up achieved and satisfied the reactor critical condition is 53 at％.The power peak shifts from the fuel outlet side （core centre） to the fuel inlet side （core periphery）,and correspondingly the peaking factor firstly decreases along with the shuffling period dramatically,then slowly to a constant.

关 键 词：行波堆 径向步进倒料 渐近态 数值计算 

分 类 号：TL329[核科学技术—核技术及应用]