PPE

Protective clothing at the scene of radiation source accident in Nanjing

Event review: a whole week has passed since the loss of 1ridium-192 in Nanjing. Although recovered, the accident did not cause personal injury, but the Ministry of environmental protection still identified the incident as a major radiation accident, the harm of radiation, the scope of influence is self-evident< After the accident, the relevant units and leaders attached great importance to it. Zhou Qifu, deputy chief engineer of the nuclear and radiation safety center of the Ministry of environmental protection, said that after the loss of radioactive sources, the safety of radioactive sources should be guaranteed first, and the relevant areas should be measured by instruments to narrow the scope and finally determine the location of radioactive sources, 1t is about 2 square meters of grass, the grass is very deep, and the radiation source is very small, 8 mm in diameter, 15 cm in length, like a necklace. Because the radioactive source is exposed, people can not be close to it for a long time, so a variety of protective measures are taken Fang Guiping, deputy director of Nanjing Municipal Environmental Protection Bureau, said that on the afternoon of the 10th, the on-site headquarters used “sea of people tactics”, each staff member wore protective clothing to dig for 2-3 minutes, and then another person took over to avoid long-term radiation. After four rounds of several batches of professional personnel entering the site to lock the area, when the 10th staff member was working, the lost radioactive source was finally found out and successfully put into the lead tank for recovery< How dangerous is iridium-192 at present, according to international standards, radioactive sources in China are divided into five categories: extremely high risk source, high risk source, medium risk source, low risk source and extremely low risk source according to nuclide type, energy size and radioactivity Zhou Qifu said that the iridium-192 lost in Nanjing was newly purchased five months ago for industrial flaw detection. According to the current activity of the lost iridium-192, the environmental protection department determined it as a class 11 high-risk source “the lost radioactive source is exposed, so the risk is relatively high.” He said Guo Qiuju, associate professor of Technical Physics Department of Physics College of Peking University, said that iridium-192 needs to be stored in lead cans and other shielding containers” 1f you use it at ordinary times and operate in strict accordance with the requirements, there should be no problem. “ according to experts, if people pick up or put them on their bodies, such close contact may lead to high radiation dose. There have been cases of skin burns or amputation due to putting radioactive sources in trouser pockets. 1f the exposure time is longer, there is also a fatal risk what is protective clothing in daily life, the radiation produced by electrical appliances will not cause harm and influence to most people, but it will cause adverse reactions to some special groups of people. The elderly, children, pregnant women and patients are more sensitive to electromagnetic radiation. For example, if pregnant women work in front of the computer for a long time, it will affect the health of the fetus. Therefore, many pregnant women will specially buy vest, belly pocket and cover with electromagnetic protection fabric to protect themselves from electromagnetic radiation protective clothing is used to protect human body from physical, chemical, biological and other external factors. The types of protective clothing include fire protective clothing, industrial protective clothing, medical protective clothing, military protective clothing and protective clothing for special groups copyright notice: This is the original article of the website reporter. 1f you need to reprint it, please indicate the source

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