中国实验快堆核反应率分布测量试验研究

Experimental Rersearch of Nuclear Reaction Rate in China Experimental Fast Reactor

摘要: 核反应率相对分布是中国实验快堆(CEFR)的重要参数，也是获取运行许可证的必要试验数据之一。利用专用试验组件，在CEFR首炉堆芯内特定的径向或轴向位置装入同种材料的探测箔片，经辐照后测量各箔片的感生放射性活度，计算其单核反应率,经归一化计算后得到CEFR堆芯的反应率相对分布曲线，此分布曲线与理论计算值比较，结果符合较好。

Abstract: This research was advocated in order to measure the nuclear reaction rate distribution in China Experimental Fast Reactor (CEFR). An experiment to get this parameter is necessary to obtain the license. A series of same foil detectors were placed in specific radial positions (or axial positions) of the initial loading of CEFR by using specialized subassembles based on the measured induced radioactive activities of these detector foils after irradiation. And nuclear reaction rates were determined. Furthermore, the distribution of nuclear reaction rate was obtained by using normalization method. The experimental results are in good agreement with theoretical calculations.