1) The radiation source device should be designed with a shielding case, including a lead shielding collimator and lead screen with uniform gaps and good shielding
Light blocking valve (shutter).
2) The inspection system should be equipped with beam output time protection measures: when the continuous beam output time of the inspection system reaches the predetermined value (such as 10s, 20s)
It should automatically stop the beam output and enter standby mode. The system needs to be restarted to continue working.
3) Setting up emergency stop switches: Multiple emergency stop switches should be installed on the control room control panel, cabinet, and distribution box, which can be used in
Cut off the output beam of the radiation device in emergency situations.
4) Set up voice broadcasting equipment: The toll room (control room) should be equipped with voice broadcasting equipment. Used to prevent and remind people on site
Evacuate personnel from radiation workplaces.
5) Radiation warning signs and warning signs: ① At the entrance of the inspection system's inspection lane, the surface of the radiation source box should be prominently displayed
Ionizing radiation warning sign, warning surrounding personnel not to approach. ② Install video surveillance and sound and light alarm systems on the door frame or column
Install red, yellow, and blue working status warning lights, sound and light alarms, and video monitoring systems in appropriate locations. Implement real-time monitoring
Work (beam out) status warning, preventing unrelated personnel from entering the radiation control area. ③ "Speed limit signs" and "prohibition" should be set up at the entrance of vehicles
Signs such as "No one inside the vehicle" and "No unrelated personnel allowed to pass through or enter the inspection channel with the vehicle".
6) Regularly clean the sound, light, and various warning signs to maintain clarity and visibility.
7) The inspection system using radioactive isotope sources should not only meet the above provisions, but also strengthen the safety management of the sources;
8) Regularly measure the perimeter of the storage container, and the specific release energy rate at a distance of 1m from the perimeter of the storage container should be ≤ 2.5 μ Gy/h;
9) At the end of each day's inspection work, use a dose rate meter to check if the source is in a safe shutdown state.