一种确定活性碳取样滤盒中131I活度的新方法

摘要

Instead of the traditional methord for measuring '"1 activation by calibrating the detecting efficiency, MCNPS caculation and ill - posed equation solution were used in a new methord for analysing 131I activation and depth distribution in sample box. Because of no necessary to prepare for standard sample and calibrate the efficiency, it makes the survey of 131I more quickly and accurately and is able to take into account the physics processes of 131 I in the sample box.%代替传统的通过效率刻度测量131I活度的方法,借助于MCNP5模拟和求解病态矩阵方程得出131I在取样滤盒中的深度分布和总活度.该方法稳定性良好,无需制备标准样品和效率刻度,有利于快速准确地监测131I的排放；可以给出深度分布,有助于了解131I在取样盒中的物理进程.