Tungsten Alloy Shielding And Radiation Protection

With the extensive application of radiation technology in our life, the word "radiation protection" also gradually attracted people's attention. Radiation protection is a comprehensive edge discipline that is defined as "the protection of people from harmful effects of exposure to ionizing radiation, and the means for achieving this". Its main research contents include radiation protection technique, radiation protection standards, radiation dosimetry, radiation protection evaluation and management. Protecting the environment and the health and safety of personnels engaged in radiation related work, public and their future generations, and to promote the development of atomic energy are the basic tasks of radiation protection. The three essential elements of radiation protection are distance, time and shielding, in other words, the main methods of radiation protection are distance protection, time protection and shielding protection. Wherein the shielding protection means setting a radiation shielding material which can effectively absorb the radiation between the radiation source and the human body, in order to decrease the strength of the radiation, and thus to protect the body from radiation damage. Tungsten alloy shielding can effectively shield the radiation, so it is widely used as a shielding material for radiation protection.

The radiation can be divided into ionizing radiation and non-ionizing radiation depending upon its energy level and ability to ionize substances. The term of radiation generally refers to ionizing radiation. Ionizing radiation is widely used in industry and medicine, and can present a significant health hazard. When it is irradiated to the human body, it can cause radiation sickness, and lead to the lesions occur in almost all the body organs and systems, of which the most obvious is the nervous system, digestive system and blood-forming organs. Long-term irradiation by the radiation can also make the body discomfort, resulting in a variety of diseases, such as leukemia, cancer, premature aging, retinopathy, reproductive system diseases. The injury caused by ionizing radiation on the human body can be divided into acute radiation injury and chronic radiation injury. Acute radiation injury means the injury arise from receiving a certain dose of radiation in a short time, which is commonly seen in nuclear accidents and patients undergoing radiation therapy; while chronic radiation injury refers to the injury arise from dispersedly receiving the radiation for a long time, including neutropenia, hematopoietic disorders, skin damage, impaired fertility and so on.

According to the research, the radiation shielding performance of a metal material increases with its density. Due to tungsten alloy shielding has a high density, it has great radiation shielding performance. Placing a tungsten alloy shielding between the radiation source and the body can effectively absorb radiation, reducing the intensity of the radiation, and thus protecting human body from radiation damage. In addition, compared with other traditional materials (such as lead), tungsten alloy shielding is non-toxic, will not endanger human health or pollute the environment, is extremely environmentally friendly shielding material.

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