SGS技术在核设施退役中的简化应用  

Pre-digestion and Application of SGS Technology in Decommissioning of Nuclear Facility

作　　者：苏容波[1,2] 李涛文[2] 夏文友[2] 胡碧涛[1] 

机构地区：[1]兰州大学核科学与技术学院,兰州730000 [2]中国工程物理研究院核物理与化学研究所,绵阳621900

出　　处：《核电子学与探测技术》2015年第12期1197-1200,共4页Nuclear Electronics & Detection Technology

摘　　要：为解决核设施退役中高密度桶装废物的测量问题,对SGS技术进行了适当地简化。采用探测效率与介质对外源吸收一一对应的方法刻度系统,利用MC程序评估串扰影响,针对主要影响因素利用介质对外源的吸收来校正串扰影响。实验结果显示:在放射源随机分布、介质密度低于1.8 g/cm^3的情况下,对^(137)Cs计算结果误差在±20%内。实验表明:根据实际需求,对SGS技术进行适当地简化应用是可行的。An appropriately simplified SGS technology is developed to solve the measurement problem of the drummed waste from decommissioned nuclear facilities. The method of system calibration is based on a eorre- sponding relationship between detection efficiency and the media absorption of out - source. Monte Carlo proce- dure is used to assess the impact of crosstalk, and for the main factors, the crosstalk is redressed by the media absorption of out -source. The experiment showed that the deviation of activity of 137Cs is smaller than 20%, on the condition that the radioactive sources are random distribution and the medium density is smaller than 1.8 g/cm-3, which indicates that the simplifying of SGS technology according to the actual requirements is feasible.

关 键 词：SGS技术 串扰影响 随机分布 

分 类 号：TL822.6[核科学技术—核技术及应用]