高电压技术2018，Vol.44Issue(5)：1699-1705,7.DOI:10.13336/j.1003-6520.hve.20180430040
GIS设备X射线检测辐射场测量及安全区域研究
Measurement of Radiation Field and Safe Area in X-Ray Detection for GIS
摘要
Abstract
X-ray detection has become an effective testing method for defects in gas insulated switchgear (GIS). However, the X-ray energy should be higher for detecting GIS with a higher voltage level and thicker wall and conductor. The safety of operator should be taken into account more carefully. Consequently,we studied the radiation field of ERESCO 65 MF4 portable X-ray machine from General Electric Company, and studied the relationship between radiation dose rate and the distance. Besides, we studied the impacts of tube voltage, tube current, distance to the X-ray outlet and angle to radiation dose rate. The results show that X-ray dose equivalent rate decreases rapidly as the distance increases, and the propagation law of X-ray is the combined effect of the inverse square law and attenuation law. X-ray dose equivalent rate at the outlet rises in the square relationship as tube voltage increases, and in linear relationship as tube current increases. Attenuation coefficient decreases as the tube voltage rises, and has no relationship with the tube current. Finally, the controlled and supervised areas are respectively delimited by 15 μSv/h and 2.5 μSv/h according to Chinese national standard, which provides the basis of security for on-site X-ray detection for GIS.关键词
SF6气体绝缘全封闭组合电器/X射线检测/辐射场测量/控制区/监督区Key words
gas insulated switchgear/X-ray detection/measurement of radiation field/controlled area/supervised area引用本文复制引用
周艺环,王嘉琛,夏健,任想,闫家启,丁卫东..GIS设备X射线检测辐射场测量及安全区域研究[J].高电压技术,2018,44(5):1699-1705,7.基金项目
国家电网公司科技项目(特高压GIS 内部缺陷检测技术深化研究)(SGSNKY00KJJS1501562).Project supported by Science and Technology Project of SGCC(Further Studies on Ultra High Voltage GIS Internal Defects Detection Technology) (SGSNKY00KJJS1501562). （特高压GIS 内部缺陷检测技术深化研究）
