目的在核与辐射事故情况下快速获取现场辐射场信息并加强属地化应急响应支持。方法采用GM计数管和Na I(Tl)闪烁体相结合的方式,拓展探测单元的γ剂量率测量量程并实时获取现场核素信息,监测数据通过内置冗余的无线传输方式(3G和RF)传至数据处理系统,系统具备气象和地理信息接口,能够实现现场污染趋势的可视化,并可对核事故释放的烟羽源项进行“反演”计算。结果探测单元结构轻便、可靠,能灵活地“散布”在事故现场周围,及时地为应急指挥中心提供决策支持。结论测试表明,本系统能够在核与辐射事故情况下为应急决策提供“一站式”服务。 OBJECTIVE To rapidly obtain field radiation field information and strengthen localized emergency response support in the case of nuclear and radiation accidents. Methods The combination of GM counting tube and Na I (Tl) scintillator was used to expand the measuring range of the γ-ray dose rate of the detection unit and acquire the nuclide information on site in real time. The monitoring data was transmitted through built-in redundant wireless transmission methods (3G and RF) To the data processing system, the system has the meteorological and geographic information interface to visualize the trend of on-site pollution and calculate the “inversion” of the smoke source items released by the nuclear accident. As a result, the structure of the detection unit is light and reliable, and can flexibly “distribute ” around the scene of the accident, so as to provide timely decision support for the emergency command center. Conclusion The tests show that the system can provide “one-stop” services for emergency decision-making under nuclear and radiation accidents.