In the work of exposure to ionizing radiation, such as improper protective measures, violation of operating procedures, the human body irradiated by the dose exceeds a certain limit, the harmful effects can occur. Under the action of electric radiation, the body's reaction depends on the type of ionizing radiation, dose, exposure conditions and sensitivity of the body. Ionizing radiation can cause radiation sickness, it is the body's systemic reaction, almost all organs and systems are pathological changes, but which to the nervous system, hematopoietic organs and digestive system of the most obvious changes.
Ionizing radiation damage to the body can be divided into acute radiation damage and chronic radiation damage. A short period of time to receive a certain dose of irradiation, can cause acute damage to the body, usually seen in nuclear accidents and radiation therapy patients. While a longer period of time scattered to receive a certain dose of irradiation, can cause chronic radioactive damage, such as skin damage, hematopoietic disorders, leukopenia, impaired fertility and so on. In addition, excessive radiation can also cause cancer and cause fetal death and malformation.
Artificial radiation
Radiation is widely used in medicine, industry and other fields. Artificial radiation is mainly used in: medical equipment (e.g., medical and imaging equipment); research and teaching institutions; nuclear reactors and their auxiliary facilities, such as uranium mines and nuclear fuel plants. Facilities such as these are bound to produce radioactive waste, some of which leaks doses of radiation into the environment. Radioactive materials are also widely used for everyday consumption, such as glow-in-the-dark watches, glazed ceramics, artificial dentures, and smoke detectors.
Related occupations also have boiler and pressure vessel nondestructive testing, commonly used command source to γ source for as a signal source, radiographic film machine to emit X-rays, the above two are commonly used in the nondestructive testing industry.