【作者】 龚随军； 李星垣； 刘吉珍； 漆明森；

【Author】 GONG Sui-Jun,LI Xing-yuan,LIU Ji-zhen,QI Ming-sen (South-West Radioactive Metrology Department of Nuclear Industry,Chengdu of Sichuan Prov.610005,China)

【机构】 中国核动力研究设计院一所；

【摘要】 在进行辐射加工和辐照试验时,最关键的参数是辐照剂量率和剂量;这些参数目前主要通过化学剂量计或电离室手工布点测量的方式确定,这需要较高的测量频度和较多的测量点才能保证辐照场空间剂量率分布的准确性,大大影响了工作效率。为此,文章提出了通过计算的方法来分析辐射场空间剂率的分布与辐照元件排布的关系,从而指导辐照元件的装载,达到简化辐射场剂量保证工作的目地。文章首先分析了HFETR辐照装置空间各点剂量率的计算理论和方法,其次通过实验测定,归纳了钴靶与乏元件活度轴向分布的典型曲线、衰变规律等,并建立了γ源资源数据库,最后依据反平方原理给出了辐射场空间剂量率计算程序的设计方案。更多还原

【Abstract】 In all radiation processing and radiation tests,the radiation dose-rate and dose are their most important parameters, which are mainly through the measurement of chemical dosimeters or ionization chambers currently.In this way,a high measurement frequency and more measurement points are required to ensure the accuracy of the spatial dose-rate distribution, it greatly affected the efficiency.So the report presents a calculation method to analyze the relationship between the spatial dose-rate distribution in radiation field and the layout of components,thus to guide the loading of components,and to simplify the working of assurance of radiation dose.In the report,it firstly analyzes the calculation theory and method of spatial dose-rate in the HFETR irradiation facility.Then a typical activity curve and its activity decay law of the cobalt targets is determined by experiments,and a database ofγsource is established,etc.Finally,the calculation program is designed based on inverse square law of spatial dose-rate calculation.更多还原