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.
出处
《核电子学与探测技术》
CAS
北大核心
2015年第12期1197-1200,共4页
Nuclear Electronics & Detection Technology
关键词
SGS技术
串扰影响
随机分布
SGS technology
the influence of crosstalk
random distribution
