第58卷第2期2024年2月原子能科学技术AtomicEnergyScienceandTechnologyVol.58,No.2Feb.2024放射性氙高灵敏度现场快速自动化监测系统研制龙斌，周国庆，田言杰，雷卫国，陈伟，苏川英，王雪梅，冯淑娟（西北核技术研究所，陕西西安710024）摘要：放射性氙监测是禁核试核查现场视察和核设施安全监测的重要项目之一，能够快速准确地甄别违约核活动和预警识别核设施的泄漏。本文综合运用超低温动态吸附、中空纤维膜除杂和现场低本底测量等技术，研制了一套放射性氙高灵敏度现场快速自动化监测系统，用于放射性氙现场取样、分离和测量。测试结果表明，该系统在氢浓度为20Bq/m²采样体积为2m²、分析周期不大于120min时，氙回收率为79.9%，对133Xe的最小可探测活度浓度（MDC）小于0.26Bg/m²，测量结果的不确定度小于土12%。该系统具有灵敏度高、分析周期短、全流程自动化的特点，能够应用于核设施安全监测、现场视察放射性氙监测、核应急放射性气体监测等场合。关键词：放射性氙；高灵敏度；快速；现场；自动化监测中图分类号：TL81doi:10.7538/yzk.2023.youxian.0227DevelopmentofRapidandHighlySensitiveOn-siteAutomaticMonitoringSystemforRadioxenonIsotopesLONGBin,ZHOUGuoqing,TIANYanjie,LEIWeiguo,CHENWei,SUChuanying,WANGXuemei,FENGShujuan(NorthwestInstituteofNuclearTechnology,Xi'an710024,China)Abstract:Forthepurposeofthepeaceful,safeandreliableapplicationofnucleartech-nology,themonitoringofradioactivegasisoneofthemostimportantitemsforon-siteinspectionofCTBTOandsafetymonitoringofnuclearinstallations,whichcouldrapidlyandcorrectlydiscriminatenuclearactivityofviolationtreatyofCTBT(ComprehensiveNuclear-Test-BanTreaty)andidentifytheleakageofnuclearinstallations.Sinceradio-xenonisotopes(mainly131m.13.3m.13e)havedistinguishedfeaturesincludinghighfis-sionyields,leakingeasilyandspreadingworldwide,notabledecaypropertiesandlowambientconcentrations,whichareseenasimportantmonitoringobjects.Basedontheproposedprinciplecombinedwiththesetechniquesincludingdynamicadsorptionat-11oCultralowtemperature,impurityremovalwithhollowfibermembranes,andgammaspectrummonitoringwithlowbackground,arapidandhighlysensitiveon-siteautomaticmonitoringsystemforradioxenonwasdeveloped,whichco...
