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              Illegal installation of Shenzhen subway security inspection machine can cause radiation leakage

              2011/10/11 11:26:11 (Views: 2011/10/11 11:26:11)

              Shenzhen Metro Luohu Station subway security checkpoint, a large number of passengers enter the station through the security checkpoint every day. X-ray baggage security inspection machines can cause radiation leakage and increase the ozone concentration in the air. Although the values of the two are not high, they still cause some citizens to be dissatisfied. Citizens reported that more than 280 X-ray security inspection machines installed in Shenzhen subway stations have not been approved by the Habitat and Environment Committee, have not been subjected to environmental impact assessments, have no permits, and violated national laws and regulations. The Shenzhen Habitat and Environment Commission confirmed that the machines were indeed illegal.

              Question 1

              Security check machine without license

              According to the Shenzhen Orbit Office, in order to host the World University Games in Shenzhen, starting from June 28 this year, 286 sets of X-line baggage security machines have been set up at five subway stations. They come from 3 manufacturers, and the cheapest is 30. Ten thousand yuan, the total value of 286 machines is about 120 million yuan.

              However, Mr. Li, who is engaged in medical radiation work, noticed that none of these security inspection machines had a "radiation safety permit" issued by the environmental protection department. This permit was approved by the environmental protection department of the people's government of the province, autonomous region, or municipality directly under the Central Government. In accordance with Article 28 of the Law of the People's Republic of China on the Prevention and Control of Radioactive Pollution and Article 5 of the Regulations on the Safety and Protection of Radioisotopes and Radiation Devices, units that produce, sell, and use radioisotopes and radiation devices shall apply for a permit. Not only that, in accordance with Article 11 of the “Administrative Measures on the Safety Licensing of Radioisotopes and Radiation Devices” promulgated by the former State Environmental Protection Administration in 2006, those who produce, sell, or use Class III radiation devices should apply for a certificate of environmental impact assessment. . The X-ray baggage security machine used in subway stations is a type III radiation device.

              Mr. Li passed by the Laojie Subway Station in July this year. When he saw that there were several college students standing there doing passenger baggage security, he asked them if there were any permits from the environmental protection department for these security machines? The college students are at a loss. Li found the subway staff. The staff said that these machines were placed at the subway station by the Public Security Bureau ’s Public Transport Bureau, and they were verbally notified to set up the machines, and they executed according to the order.

              The reporter consulted the Shenzhen Human Settlement and Environment Commission late last month. None of the X-ray baggage security checkers set up at the Shenzhen Metro Station had the "radiation safety permit" issued by the Guangdong Environmental Protection Bureau, nor had the X-ray baggage security checkers affected the environment Assessment, which should be carried out by the Habitat Environment Committee.

              Question 2

              Use is not standardized

              The use of X-ray security screening machines at subway stations was not standardized due to failure to pass the approval. The reporter learned on the 9th at the Science Museum subway station that the mobile ray leak measuring device provided by Shenzhen Security Company was not used because there was no battery. In fact, at the beginning, after the security company issued a battery, it was never issued again. As for the training and assessment of personnel, there are also irregularities. According to security inspectors from Wuhan Police Officer Vocational College on duty here, although they have received theoretical and practical training, they have not undergone any assessment.

              Why do I need a permit to use the X-ray baggage security machine? X-rays are a form of electromagnetic radiation and are harmful to the human body. However, the baggage security check machine is made of thick lead up, down, left, and right. Lead can effectively block the penetration of X-rays. The baggage security inspection channel is also covered by a lead curtain, but there is still the possibility of leakage.

              According to the "Basic Standards for the Protection of Ionizing Radiation and the Safety of Radiation Sources" (GB18871-2002) issued by the state, the public cannot receive artificial radiation doses of more than 1 millisievert per year, and those who have been exposed due to occupation must not exceed 20 Millisieverts. One millisievert is equivalent to the radiation dose received for ten chest radiographs. If you receive too much radiation, the probability of disease will increase, and cancer, chromosomal aberrations, and affected embryos will be more likely. The radiation leakage of the X-ray baggage security inspection machine at the subway station is relatively low, but it is still within the scope of national control.

              Question 3

              Security screening machine exempted

              What about radiation leaks from subway X-ray baggage security checkers? What impact will it have on the environment? The reporter learned that not only the X-ray baggage security inspection machine must apply for a "radiation safety permit", but the environmental protection department must also evaluate the impact of the X-ray machine on the environment and form a written document.

              However, from the time the X-ray machine was installed at the subway station to the end of the Universiade, the Nuclear and Radiation Management Center under the Shenzhen Municipal Human Settlement Environment Committee did not evaluate the safety of the X-ray machine and its impact on the environment, although they had You know the existence of X-ray machines. On the 24th of last month, they said in an interview that they, like ordinary citizens, were discovering the existence of X-ray machines while sitting on the subway, and no one had notified them in advance of the security screening of the subway. However, after finding that the X-ray machine had no permit, they did not conduct an environmental impact assessment on the setting of the security screening machine. Until the reporter sent an interview letter on September 21, they only went to Shangmeilin Metro Station for a test. The test result was "the radiation level of the X-ray luggage security inspection machine has reached the exempt level".

              ■ Field inspection

              Radiation levels are not covered by the exemption

              In order to understand the safety of the subway X-ray baggage security inspection machine and its impact on the environment, on September 24, the reporter and the staff of Shenzhen Nuclear and Radiation Management Center came to Meilin Metro Station on Line 4 and Line 2 Tian subway station to conduct field inspections.

              Located at Shangmeilin Subway Station is a security inspection machine. After testing, there is basically no radiation leakage on the side, but the value at about 10 cm at the baggage entrance and exit is slightly higher than the level of exemption mentioned by the staff of the Nuclear and Radiation Management Center. Subsequently, the staff of the Nuclear and Radiation Management Center came to a machine at Jingtian Station of Metro Line 2. The radiation leakage of this machine was significantly higher than that measured by Shangmeilin Metro Station. From the test results, the Nuclear and Radiation Management Center acknowledged that the radiation leakage at the entrance and exit of the two security inspection machines exceeded 1 μSv / n, and they both needed to obtain a Radiation Safety Permit, which was not within the scope of exemption.

              In addition, X-ray baggage inspection machines will not only produce radiation leakage, but also produce ozone, nitric oxide and other gases, which will affect air quality. However, the impact of X-ray baggage security inspection machines on air quality has not been included in the monitoring project of the environmental protection department.

              Why should the security check machine not apply?

              Why didn't Shenzhen Metro's baggage security inspection machine apply for a radiation safety permit? Section Chief Han of Shenzhen Habitat and Environment Commission Nuclear and Radiation Management Center explained 5 reasons:

              Mr. Li, the citizen, disputed the Habitat's explanation:

              Department statement 1: The radiation level of the X-ray baggage security inspection machine is close to the radiation safety permission level of the environmental protection department.

              Citizen objection: The radiation level is close to the radiation safety permit level of the environmental protection department? X-ray baggage security inspection machines have always been listed as Class III ray devices. National laws clearly require a permit. If it is safe, why do we need an environmental impact assessment and why do we need a permit? Isn't it redundant?

              Department statement: The application for radiation permit requires environmental monitoring and evaluation, a large workload, a large amount of resources from the government and enterprises, and a certain period of time.

              Citizen dissent: Applying for a permit adds workload to the environmental protection department? This argument is obviously not valid, and it is not possible to fail to perform the duties of supervision for this reason.

              Department statement: X-ray baggage security inspection machines are temporary security management measures. According to their understanding, the baggage security inspection machines used by the Beijing Olympics and Guangzhou Asian Games have not been issued radiation safety permits.

              Citizen objection: Even if Beijing and Guangzhou did not apply for a permit, it would not be legal to act on behalf of the relevant Shenzhen authorities.

              Department statement: The data collected by the Municipal Human Settlement Commission on the monitoring and inspection of Shenzhen-based enterprises' production and sales and the use of X-ray baggage security check machines show that the radiation level of X-ray baggage security check machines has reached an exempted level and will not affect the environment and public health The specific procedures for permits and exemptions shall be chosen by the enterprise.

              Citizen objection: The radiation level of X-ray baggage security inspection machine has reached the exemption level? Since the X-ray security machines were placed in subway stations, environmental protection departments have not inspected them. Just looking for one or two subway stations to test, can we prove that the machines have reached the exemption level?

              Department statement: The Municipal Habitat Committee attaches great importance to the radiation safety permission of the X-ray baggage security inspection machine for the subway, and has investigated the situation with relevant units such as the Public Security Branch of the Municipal Public Security Bureau, Shenzhen Metro Company and MTR Rail Transit Shenzhen Co., Ltd. At present, the owner of the X-ray baggage security inspection machine used by Shenzhen Metro belongs to the Municipal Public Security Bureau. The user is responsible for the winning security company. After the Universiade, its ownership and user will be changed. If it continues to be used, the radiation safety responsible unit will be ordered according to law. Go through the radiation permit or exemption procedures according to law.

              Citizen objection: The ownership and user have changed. This only means that the new owner and user must report to the environmental protection department again. It does not mean that the environmental protection department can let the security inspection machine be used illegally now.

              According to the Southern Metropolis Daily

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