Lead can

       Lead can is a kind of thick shielding container made of lead, which is used for transporting or storing radioisotopes or other radioactive materials.
       Radioactive substances in the decay reaction can release a variety of rays, they often have adverse effects on the human body. Therefore, it is necessary to find a substance that can "block" these rays as a container. The lead tank is the most commonly used source storage container. The main types of lead cans include storage lead cans, medical lead cans and leaching lead cans produced by Zhengzhou double radiation protection equipment Co., Ltd.
       In practical work, due to the limited conditions, it is often impossible to achieve the purpose of safe operation only by shortening the contact time and increasing the distance.
       For example, if a large 60Co radiation source is installed indoors, the maximum distance from the staff is only a few meters. The dose equivalent at the worker's place may be more than 1 Higgs, and even staying there for one second is very dangerous. Therefore, the above two methods are not applicable, but must use shielding protection. Shielding protection is based on the principle that radiation is weakened when passing through the material, adding a thick enough shielding material (weakening material) between the person and the radiation source to reduce the external radiation dose below the control standard, so as to protect human safety. The material used for shielding is determined according to different properties, types and output of rays, and its thickness is determined according to the control level. In external radiation protection, the above basic measures should be reasonably applied according to the actual situation. When solving specific protection problems, these measures are often combined. In addition to the above-mentioned basic measures, the protection training for the staff, the monitoring of the working environment and personal dose, and the timely shielding or removal of temporarily useless or redundant radioactive substances should also be done. In addition, any interaction between ionizing radiation and air will produce some harmful gases, such as ozone and nitrogen oxides. At the same time, substances (including air and dust) irradiated by high-energy charged particle beam, neutron beam or high-energy photon beam may also be induced to induce radioactivity. Therefore, in the application of external ionizing radiation source, in addition to paying attention to the radiation protection of external irradiation, other corresponding measures (such as ventilation) must be taken to prevent the damage of internal irradiation, harmful gases and other harmful factors to human body.