本标准规定了国土安全应用中使用的主动询问系统的最低操作和性能要求。这些系统采用穿透电离辐射（例如中子、高能x射线、伽马射线），通过检测受激二次辐射或核共振对比来检测和识别隐藏的特殊核材料、爆炸物和化学战剂，对相关物质的成分进行元素和/或同位素识别。这些检查系统可设计用于各种尺寸的开放式检查区或各种尺寸的集装箱，如小包装、公文包、行李箱、航空货运集装箱、乘用车、双轴卡车、多式联运集装箱、半挂车/牵引钻机或轨道车。该系统可设计用于室内、室外或移动设施。 本标准不适用于小型便携式系统。

This standard specifies the minimum operational and performance requirements of active interrogation systems for use in homeland security applications. These systems employ penetrating ionizing radiation (e.g., neutrons, high-energy x-rays, gamma-rays) to detect and identify hidden special nuclear material, explosives, and chemical warfare agents by the detection of stimulated secondary radiations or by nuclear resonance contrast, giving elemental and/or isotopic identification of the composition of the substances-of-interest. These inspection systems may be designed for open inspection zones of various sizes or for various sizes of containers such as small packages, briefcases, suitcases, air cargo containers, passenger vehicles, two-axle trucks, intermodal cargo containers, semi-trailers/tractor rigs, or rail cars. The systems may be designed for operation in indoor, outdoor, or mobile facilities. This standard does not apply to small portable systems.