Which is the best Shanghai column type nuclear radiation dose detection system

Column type nuclear radiation dose detection systemIt can perform online real-time monitoring of pedestrians passing through the detection channel, detect trace radioactive source substances carried in the human body and personal belongings, identify the type of radioactive nuclide (NaI (Tl) detector and nuclide identification module need to be selected), issue alarm messages, and complete the storage of detection data.

Column type nuclear radiation dose detection systemTechnical Specifications:

◎ Nal (TI) detector:

Detector size: standard size is 50mm × 100mm (with a single crystal volume of 0.20L),A single NaI crystal with a volume of 0.45L and an energy resolution of 137Cs (662KeV) not exceeding 8%, with a diameter of 75mm × 100mm; Use 3-5mm lead shielding on non detection surfaces to ensure effective shielding of the background;

◎ Plastic flash detector:

Detector size: standard 50mm × 100 × 1000mm (single crystal volume 5L), non detection surface uses 3-5mm lead shielding to ensure effective shielding of the background;

◎ Neutron detector (optional): He-3 proportional counting tube neutron detector, plus polyethylene moderator;

◎ Detector energy influence range: Gamma detector: 25keV~3MeV; Neutron detector: thermal neutron~14MeV; Gamma detection sensitivity: At a background level of 0.2 μ Sv/h, an increase of 0.1 μ Sv/h will trigger an alarm within 1 second; Detection probability: ≥ 99.9%;

◎ False alarm rate: ≤ 0.1%;

◎ Monitoring area height double-sided detector: 0.1 m to 2 m; Width: 1.5m;

◎ Nuclide identification function: 1024 spectral analysis channels, with real-time spectral analysis and gamma nuclide identification functions, can identify industrial, natural radioactive properties, special nuclear materials and other radioactive nuclides, with custom nuclide library function;

◎ Identification sensitivity: It can correctly identify the following standard test sources and ensure that at least 8 out of 10 passes of each radioactive source are correctly identified: 241Am (740KBq); 137Cs（360kBq）； 60Co（350kBq）； (Test conditions: Gamma reference background is not greater than 20 μ R/h; The distance between the radioactive source and the detection surface is 0.5 meters; Gamma source without shielding; Source movement speed: not greater than 1.2m/s; Accuracy of source activity:+20%);

◎ Alarm method: Local sound and light alarm. When the gamma (neutron) count rate exceeds the alarm threshold, an audible and visual alarm will be triggered, and the alarm threshold can be adjusted;

◎ Data storage: It can instantly store the monitoring and alarm data of the local radioactive material monitoring system, and query historical alarm records based on time. The alarm information that can be queried includes: device information, alarm threshold information, alarm level information, alarm type, travel time, captured images, etc; The nuclide identification mode also includes the identified nuclide information.