研究试验堆用于同位素生产的物理分析  

Physical Analysis of Radioisotope Production in Research and Test Reactor

作　　者：彭钢[1] 

机构地区：[1]中国核动力研究设计院核反应堆系统设计技术重点实验室,四川成都610041

出　　处：《原子能科学技术》2014年第11期2063-2071,共9页Atomic Energy Science and Technology

摘　　要：本文对研究试验堆开展同位素生产进行了物理分析。分析了控制棒提棒顺序对同位素产量的影响,提出了提棒因子的概念。依据点堆模型和反应性-燃耗线性公式,得到了同位素的转换比和产量公式。最后根据这些公式,分析了高通量工程试验堆(HFETR)在高浓铀和低浓铀堆芯装载下,堆芯炉的运行寿期、燃料元件装载数量、燃料元件初始平均燃耗和堆芯功率对同位素转换比和产量的影响。结果显示,从小到大提棒、增加堆芯燃料组件盒数和功率水平均会增加堆芯同位素产量,而全年运行段数(运行段间检修时间不变)和堆芯平均初始燃耗增加则起到相反的作用。这些结果已经用于指导反应堆的堆芯装载设计。The physical analyses of radioisotope production in research and test reactor were carried out .Firstly ,the influence of control rod withdrawing sequence on isotope production was analyzed ,and the rod withdrawing factor was obtained .Then according to the point reactor model and the reactivity‐burnup linearity equation ,the equations of radioisotope conversion ratio and production were acquired .Finally ,several parameters including cycle length ,fuel assembly （FA） numbers ,initial average burnup of FAs and power in HEU and LEU core of HFETR were analyzed with these equations .It is con‐cluded from the results that the radioisotope production increases with the control rod withdrawing sequence from the smallest to the largest value rod ,and with the increase of the fuel assembly number and power ,while the cycle numbers （the inspection time betw een adjacent cycles is unchanged） and initial average burnup have opposite effects . The results are applied in the design of reactor loading patterns .

关 键 词：研究试验堆 同位素生产 转换比 堆芯装载 高浓铀 低浓铀 

分 类 号：TL329.2[核科学技术—核技术及应用]