在线分析管道中γ放射性核素活度变化
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摘要
用HPGeγ能谱分析系统连续采集管道液体的能谱,分析这些不同时间段的能谱,得到各个特定核素浓度在各个时刻浓度变化趋势。实验在中国核动力研究设计院HFETR(高通量工程试验堆)一回路取样管道进行。系统应用软件为标准Windows应用程序,采用C++语言开发,主要功能包括监测核素的选取、谱数据的实时采集控制、分析及数据曲线绘制等。利用Gamma Vision软件提供的谱分析功能分析核素特征峰净面积计数,利用其提供的循环控制谱采集的功能控制数据的获取、循环及存储,一组循环内可以存储分析1 000个不同谱文件。软件系统设计为相对独立,可针对已有的硬件系统进行扩展。系统可同时在线监测多组核素的活度比值变化关系。分析得到了~(137)Cs、~(60)Co、~(135)Xe、~(88)Kr和~(131)I等核素活度随时间的变化关系图。
Continuously acquiring y spectrum of liquid in pipe by HPGe detector,activity varying trends of several radio-nuclides at different time intervals are got by analyzing these spectrum.Experiments are on HFETR coolant sampling pipe of Nuclear Power Institute of China.The software is standard Windows software,developed by C++ language.The main functions include radionuclides selecting,real-time controlling of spectrum acquiring,analyzing and curve plotting.Peak area calculating,acquiring looping and storing are controlled by using Gamma Vision functions.1 000 spectrum can be acquired in one loop.The software is standalone and can be updated according to different hardwares.The system can monitor activity ratios of several radionuclides at the same time.~(137)Cs,~(60)Co,~(135)Xe,~(88)Kr and ~(131)I activity varying curves are acquired and plotted.
引文
[1]王世联,王军,樊元庆,等.2006年度CTBT大气颗粒物滤材样品的国际比对[J].原子能科学技术,2008:310-315.
    [2]IAEA,Update of X Ray and Gamma Ray Decay Data Standards for Detector Calibration and Other Applications,2007.

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