The Secret of Radioactive Sources
In the industrial field, there is a magical technique called gamma ray inspection, also known as “industrial photography”. Imagine taking an X-ray of a large casting or pipeline weld, but this time using gamma rays. Gamma rays have strong penetrating power and can easily penetrate thick metals, helping us inspect cracks and scars that are difficult to detect with the naked eye.
The protagonists of gamma ray testing are two types of radiation sources, 192Ir and 60Co. The gamma rays they emit are partially absorbed when they penetrate matter. If cracks or scars are encountered, more radiation will penetrate through, causing differences in imaging and revealing the location of the wound. The strength of this technology lies in its ability to penetrate steel with a thickness of up to 200mm, and the equipment is lightweight and does not require an external power source. It is particularly suitable for outdoor operations and detecting irregularly shaped objects, such as circular or spherical components.
Considerations for safety and protection
However, gamma ray testing also has its “temper”. The radioactive activity of a radioactive source naturally decays over time, and regardless of whether the machine is turned on or not, the source silently releases radiation, so it needs to be replaced regularly. Safety has become the top priority of this technology. Before working in the field, it is necessary to divide the control area and supervision area, hang prominent warning signs, and ensure that the public stays away from the radiation area. After all, if a powerful radioactive source directly irradiates the human body, the consequences would be unimaginable.
Convenience and safety coexist
If gamma ray inspection is the “see through eye” of the industry, then X-ray inspection is another capable assistant. It uses X-rays emitted by X-ray machines for non-destructive testing. When a high voltage power supply is applied to the two poles of the X-ray tube, a strong electric field is formed. Electrons accelerate in this electric field and shoot towards the target like arrows, producing X-rays upon impact. The energy of these rays is directly proportional to the tube voltage, which can typically reach several hundred kilovolts.
One major advantage of X-ray inspection is that it does not require a radiation source, and there is no problem of radiation after shutdown, making the operation more convenient and safe. However, during on-site inspection, it is still necessary to pay attention to X-ray protection. During the flaw detection process, careful consideration should be given to the distance, irradiation direction, time, and shielding conditions between the controller, X-ray tube, and the object being inspected. Similarly, control and supervision areas should be established, and corresponding warning signs should be hung to remind unrelated personnel to stay away.
The light of technology illuminates the path of safety
Both gamma ray inspection and X-ray inspection are indispensable tools in modern industrial quality testing. They are like the “perspective mirror” of industrial doctors, helping us to timely detect and repair potential safety hazards, ensuring that every product can withstand the test of time. However, despite the power of technology, safe use is the ultimate principle. Only by strictly following the operating procedures, strengthening radiation protection and radiation source management, can we let this beam of technology illuminate every step of safe production. On the road of industrial inspection, we are both explorers and guardians, jointly guarding the safety and health of every life.
Post time: Jun-04-2025