【摘要】 航空放射性测量是突发核事故后对广大区域的辐射状况进行快速测量的关键技术手段之一。论文分析了国内外航测技术现状,以及适用于核应急监测的航测系统的特点。以此为基础,通过小面源累加刻度实验估算了国内的GRS-16航测系统对地表沉积的137Cs和131I的探测限。另外,通过文献调研和蒙卡模拟计算,估算了国外先进航测系统对上述核素的探测限。并分析了二者的差距。更多还原

【Abstract】 Airborne radiation survey is the only effective technology when nuclear accident has happened,and rapid survey of the contaminated areas is needed.In this article,available instruments used in China and all over the world,and the instrument best suit for this task were analyzed.Based on the analysis,minimum detectable activities(MDAs) of 137Cs and 131I measured by GRS-16 in China were calculated according to the results obtained by accumulative calibration of small sources.Furthermore,MDAs of more advanced airborne radiation survey instrument were calculated according to the relative article and Monte Carlo simulation.At last,differences between various instruments were analyzed.更多还原