滞留量测量校正技术研究

Study on correction technology of holdup measurement

测定核设施工艺设备内的滞留量是核材料衡算过程中的技术难题,直接影响核设施的核材料闭合衡算,为了更加准确地测量滞留量,提出一种校正方法,该方法在滞留量测量的点、线模型基础上,对探测器的探测效率进行更加精细的校正,当核材料残留呈线状分布但存在一定宽度或呈点状分布但存在一定面积时,提出的校正方法能对滞留量的测量结果起到较好的修正效果,为滞留量测量准确度的提高起到一定的作用。

Holdup measurement is a technical problem in nuclear material accounting and directly affects the results of nuclear material accounting in nuclear facilities closure.In order to measure the holdup more accurately,a correction method was proposed in this paper.Based on the point and line model of the holdup measurement,this method can correct the detector’s detection efficiency more precisely.When the nuclear material remains are linear with certain width or point-like distribution but with certain area,the proposed correction method can be used to correct the measurement result and improve the accuracy of holdup measurement.