This standard specifies the radiation health protection technical requirements and detection and inspection requirements for X-ray baggage inspection systems (hereinafter referred to as systems) and their use. This standard applies to cabinet-type X-ray systems for baggage inspection. This standard does not apply to portable small X-ray machines for baggage inspection and X-ray systems for large container security inspection. GBZ 127-2002 X-ray baggage inspection system health protection standard GBZ127-2002 standard download decompression password: www.bzxz.net

Ics13.100
National occupational
health standard of the People's Republic of China
GBZ 127-2002
Radiological protection standardfor X-ray luggage inspection system2002-04-08Promulgated
Ministry of Health of the People's Republic of China
Implementation on 2002-06-01
1Scope
2Terms and definitions
3Technical requirements for radiological protection of X-ray luggage inspection system4Requirements for radiological protection in the use of X-ray luggage inspection system5Requirements for testing and inspection of X-ray luggage inspection systemAppendix A (Normative Appendix)Schematic diagram of radiation measurement points on the outer surface of X-ray luggage inspection system
This standard is formulated in accordance with the Law of the People's Republic of China on the Prevention and Control of Occupational Diseases. In case of any inconsistency between the original standard GB17060-1997 and this standard, this standard shall prevail.
Chapters 3 to 5 and Appendix A of this standard are mandatory contents, and the rest are recommended contents. X-ray baggage inspection system is a device that uses ionizing radiation to conduct security inspections on baggage at airports, stations, customs and other places. Due to the possible harm of ionizing radiation to the public, when compiling this standard, the relevant contents of the US Federal Administrative Regulations 21CFR1020.40 were adopted based on the equipment and its use in my country. Appendix A of this standard is a normative appendix.
This standard is proposed and managed by the Ministry of Health.
The drafting unit of this standard: Institute of Radiation Medicine, Shandong Academy of Medical Sciences. The main drafters of this standard: Hou Jinpeng, Deng Daping, Zhu Jianguo, Qiu Yuhui, etc. This standard is interpreted by the Ministry of Health.
Sanitary protection standard for X-ray baggage inspection system 1 Scope
GBZ127-2002
This standard specifies the technical requirements and inspection and testing requirements for radiological health protection of X-ray baggage inspection system (hereinafter referred to as system) and its use. This standard applies to cabinet X-ray systems for baggage inspection. This standard does not apply to portable small X-ray machines for baggage inspection and X-ray systems for large container security inspection.
2 Terms and definitions
The following terms and definitions apply to this standard. 2.1
Cabinet X-ray system cabinet X-ray system A system with X-ray tubes installed in the cabinet, which is used to perform X-ray irradiation inspection on baggage entering the cabinet. When X-rays are generated, the system can not only shield radiation, but also prevent personnel from entering the cabinet.
X-ray equipment (except for modified ones) that is temporarily or accidentally equipped with a portable protective baffle is not considered a cabinet X-ray system.
External surfaceexternalsurface
The external surface of a cabinet X-ray system, including the high voltage generator, doors, covers, control knobs and other permanently mounted rigid devices, as well as the plane across any windows and access ports. 2.3
Access port
An opening on the external surface of the system that remains open during X-ray emission, designed to transfer luggage bags into and out of the cabinet X-ray system for irradiation or for partial irradiation due to the size of the luggage bags that are difficult to enter the cabinet as a whole.
Door
Any barrier designed to be removable or openable for normal operation, which can generally be opened without tools and allows access to the interior of the cabinet. Rigid devices mounted on the door are also part of the door. 2.5
Access panel
Any barrier or panel designed to be removable or openable for repair or maintenance purposes, which can only be opened with the help of tools to enter the cabinet. 2.6
Ground fault
Accidental short circuit of conductor to ground.
Aperture
Any opening on the outer surface of the system, excluding the passage openings that remain open during X-ray emission. 3 Technical requirements for radiation protection of X-ray baggage inspection system 3.1 When the system generates radiation, the air kerma rate at any point 5cm away from its outer surface shall not exceed 5uGy·h.
3.2 The single-piece protective thickness of the lead-rubber curtain at the passage opening of the system shall not be less than 0.35mm lead equivalent. 3.3 Safety interlocks of the system
3.3.1 Each door of the system requires at least two safety interlocks. When the door is opened, any one of the interlocks can cause the high-voltage generator power supply line to be automatically disconnected. Except for the door, the movement of other parts will not cut off the current.
3.3.2 Each cover has at least one safety interlock. When the cover is removed and the safety interlock switch is activated, the system will not be able to generate X-rays.
3.3.3 After any safety interlock causes the X-ray to be interrupted, the controller must be used again to generate X-rays.
3.3.4 The failure of any independent component of the system should not cause more than one safety interlock to fail. 3.4 The ground fault will not cause the system to generate X-rays. 3.5 The power-on indicator light and X-ray emission indicator light should be permanently installed on the top plate of the system. 3.6 The system key-opening controller should ensure that the system does not generate X-rays after the key is removed. 3.7 It should be ensured that the original design of the system safety is not modified or changed. 4 Radiation protection requirements in the use of X-ray baggage inspection system 4.1 When the system is working, no part of the body is allowed to enter the radiation beam through the channel opening and window. 4.2 In case of emergency during the use of the system, the emergency stop button should be pressed to stop the system from running. 4.3 If the power-on indicator light and X-ray emission indicator light of the system are found to be unable to work properly during the use of the system, the system should be shut down and repaired immediately.
4.4 The safety interlock and electrical performance of the system should be regularly maintained and inspected to prevent accidents. 4.5 The lead-rubber curtain at the entrance of the system should be kept intact, and the damaged lead curtain should be replaced in time. 4.6 When the system is repaired, the power supply should be cut off first. After the safety interlock is restored, the debugging is carried out through the forced button.
5 Inspection and testing requirements for X-ray baggage inspection system 5.1 The detection of the radiation control value of the system outer surface specified in 3.1 of this standard should be carried out when the door and cover are fully closed and fixed in place, and the voltage, current, beam direction and scattering conditions of the X-ray tube ensure that the X-ray radiation of the outer surface of the system in the operating state reaches the maximum. The average measurement is carried out on the receiving area with a straight-line distance of no more than 5cm and a cross-section of no less than 10cm. The plane diagram of the radiation measurement points on the outer surface of the system is shown in Appendix A (Normative Appendix). The maximum value of the measurement results of each point is required to comply with the provisions of 3.1 of this standard. 5.2 When the system is subjected to radiation detection, the ionization chamber or cumulative dose meter method with known energy response calibration should be used for measurement.
5.3 The cut-off inspection of any safety interlock device of the system should comply with the provisions of 3.3 of this standard. 5.4 Test the power switch of the system. The system should not generate X-rays when the power switch is turned off. 5.5 Newly designed and installed X-ray baggage inspection systems must undergo acceptance testing for protection performance. For unqualified equipment, retest it after modification. 5.6 Routine testing of system radiation safety is performed once a year Baggage bag exit
Appendix A
(Normative Appendix)
Schematic diagram of radiation measurement points on the outer surface of the X-ray baggage inspection system Position of baggage when X-rays occur
Luggage bag population
1, 2, 3—Reference position of measurement points
Side plan diagram of passenger passagebzxZ.net
Lead rubber curtain at the passage entrance
1, 2—Reference position of measurement points
Figure A2 Side plan diagram of baggage bag entrance
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