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GBZ143-2015: Radiation protection requirements for cargo/vehicle radiographic inspection system
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Radiation protection requirements for cargo/vehicle radiographic inspection system
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GBZ 143-2015
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Radiological protection standard for container inspection system
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PDF similar to GBZ143-2015
Basic data | Standard ID | GBZ 143-2015 (GBZ143-2015) | | Description (Translated English) | Radiation protection requirements for cargo/vehicle radiographic inspection system | | Sector / Industry | National Standard | | Classification of Chinese Standard | C57 | | Classification of International Standard | 13.1 | | Word Count Estimation | 16,137 | | Date of Issue | 2015-01-13 | | Date of Implementation | 2015-06-01 | | Older Standard (superseded by this standard) | GBZ 143-2002 | | Quoted Standard | GB 4075; GB 7465; GB 11806; GB 18871-2002; GBZ 114 | | Regulation (derived from) | State-Health-Communication [2015] 1 | | Issuing agency(ies) | National Health and Family Planning Commission | | Summary | This Standard specifies the goods/vehicle radiation inspection system (hereinafter referred to as the inspection system) radiation level control, safety, operation, monitoring and inspection of radiation protection requirements. This Standard applies to the use of the following types of radiation on goods, transport vehicles, freight trains scan imaging inspection system: Accelerator (maximum electron energy is less than IOMeV) generated by X-rays; ��-ray release of sealed radioactive sources; (D, D) and (D, T) generated by fast neutron reactor. This Standard does not apply to the use of X-ray inspection system machine, backscattered type of inspection systems and computed tomography scan system. | GBZ143-2015: Radiation protection requirements for cargo/vehicle radiographic inspection system
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Radiation protection requirements for cargo/vehicle radiographic inspection system
ICS 13.100
C57
People's Republic of China National Occupational Health Standards
Replacing GBZ 143-2002
Radiation protection requirements for cargo/vehicle radiation inspection systems
2015-01-13 released
2015-06-01 implementation
People's Republic of China
National Health and Family Planning Commission released
Directory
Preface III
1 Scope 1
2 normative reference document 1
3 Terms and definitions 1
4 Check system classification 2
5 Radiation workplaces and safety signs 3
6 Radiation level control requirements 3
7 Radiation safety facilities requirements 4
8 Operational requirements 6
Monitoring and inspection of radiation protection
Appendix A (normative) Contents and cycles of radiation protection monitoring and inspection
Appendix B (Normative Appendix) Inspection System Radiation Protection Monitoring Method 9
Reference 12
Foreword
According to the "People's Republic of China Occupational Disease Prevention Law" to develop this standard.
Chapter 4 of this standard is a recommendation clause and the rest is a mandatory clause.
This standard is drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GBZ 143-2002 "Container Inspection System Radiation Health Protection Standard". This standard is in line with GBZ 143-2002
The main technical changes are as follows.
--- Standard name changed to "Radiation protection requirements for cargo/vehicle radiation inspection system";
- the scope of application of Chapter 1 increases the use of (D, D) and (D, T) response neutron inspection system, not applicable to the increase in the use of
X-ray machine inspection system, back scattered type of inspection system;
--- Added terms and definitions;
- modified inspection system classification, radiation workplace partition, radiation level control requirements, radiation safety facility requirements, operational requirements,
Radiation protection monitoring and inspection related content;
--- Radiation level control requirements removed Accelerator Modulator Leakage Radiation level and radioactive source Storage container Leakage level of radiation
Off content
- an additional requirement for a personal dose limit, a driver's vehicle inspection system, a driver's freight train
The additional requirements of the inspection system, the additional requirements of the neutron inspection system and other related requirements;
--- Amend the relevant contents of Appendix A and Appendix B.
The drafting of the standard units. Tsinghua University, Beijing Center for Disease Control and Prevention, Shandong Academy of Medical Sciences Institute of Radiation Medicine.
The main drafters of this standard. Li Junli, Deng Daping, Wan Ling, Deng Yanli, Hou Lina, Zhang Hui, Ming Shenjin, Zhu Guoping, Huang Ming, Guili Ming
This standard replaced the previous version of the standard release.
--- GBZ 143-2002.
Radiation protection requirements for cargo/vehicle radiation inspection systems
1 Scope
This standard specifies the radiation level control, safety facilities, operation and monitoring of the cargo/vehicle radiation inspection system (hereinafter referred to as the inspection system)
With inspection and other radio protection requirements.
This standard applies to the use of the following types of radiation on the goods, transport vehicles, freight trains scan imaging inspection system.
--- X-ray produced by accelerator (maximum electron energy less than 10MeV)
--- sealed radioactive source release of γ-ray;
(D, D) and (D, T) to produce fast neutrons.
This standard does not apply to the use of X-ray machine inspection system, back scattered type of inspection system and computer tomography inspection system.
2 normative reference documents
The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this article
Pieces. For undated references, the latest edition (including all modifications) applies to this document.
GB 4075 sealed radioactive sources - general requirements and classification
GB 7465 High activity cobalt 60 sealed radioactive source
Directive transport of radioactive material
Basic safety standards for ionizing radiation protection and radiation source GB 18871-2002
GB 11 114 Radiation health protection standards for sealed radioactive sources and sealed gamma radioactive sources
3 terms and definitions
The following terms and definitions apply to this document.
3.1
Cargo/vehicle radiation inspection system cargo/vehicleleradiographicinspectionsystem
With photon or neutron radiation source, radiation detectors and other devices and facilities, the use of radiation imaging principles to obtain goods and vehicles and other objects
Visual inspection system.
3.2
X-ray inspection system X-rayinspectionsystem
An accelerator that produces an X-ray is used as an inspection system for the radiation source.
3.3
gamma ray inspection system gamma-rayinspectionsystem
The use of the release of γ-ray sealed radioactive source as a radiation source inspection system.
3.4
Neutron check system neutroninspectionsystem
A neutron generator that produces a fast neutron device [for example, (D, D) and (D, T)) is used as an inspection system for the radiation source.
3.5
Radiation source box radiationsourcebox
Including a radiation source, a radiation source shield, a primary collimator, a shutter assembly, and the like.
3.6
Radiation source room radiationsourceroom
The space in which the radiation source box is enclosed by a radiation shield.
3.7
Control area controledarea
In areas where the radiation workplace is divided, special protection and safety measures are required or may be required in such areas,
so that.
a) Under normal operating conditions to control the normal exposure or to prevent the spread of pollution;
b) to prevent potential exposure or to limit its extent.
3.8
Supervise the district supervisedarea
Has not been identified as a control area, usually do not need to take special protective measures and safety measures but to constantly check the conditions of their occupational exposure
What area.
3.9
Radiation workplace radiationworkplace
Control area and supervision area collectively.
3.10
Useful harness area usefulbeamarea
A region covered by a useful (primary) wire harness for radiation imaging, issued by the radiation source and defined by the collimating device.
3.11
Leaky leaks
Through the protective shield through the radiation source or by the radiation source shield shield to escape the radiation.
3.12
Accelerator Leakage Rate acceleratorleakageratio
In the area other than the useful harness, the leakage current at the target of 1m from the accelerator target is less than the average air ratio on any 100 cm2 area
The ratio of the ratio of the ratio (rate) to the ratio of the air to the kinetic energy (rate) at the target axis at the target axis of 1 m.
4 Check system classification
4.1 Classification by type of radiation source.
a) X-ray inspection system;
b) gamma ray inspection system;
c) Neutron check system.
4.2 Classification by structure.
a) Fixed inspection system. the radiation source and the detector system are fixed, moving the object through the useful harness area to achieve radiation imaging
Check the system. Check the system of radiation shielding is usually used building shield or fence and other methods;
b) mobile inspection system. the subject is fixed, the radiation source and the detector system around the subject movement to achieve radiation imaging inspection
system. The radiation shielding of the inspection system may be carried out by means of self-shielding, fencing or building shielding, and may be carried out at different inspection sites
Use.
4.3 Classification by inspection object.
a) inspection system for cargo vehicles or goods without driver's driving;
b) the driver's vehicle inspection system, equipped with the driver to avoid automatic protection and other measures can be achieved without scanning the driver only sweep
Box;
c) There are drivers to drive the freight train inspection system, equipped with automatic protection of the train head to avoid such measures can be achieved without scanning the driver
Where the train head only scans the cargo compartment.
5 Radiation workplace partitions and safety signs
5.1 Radiation workplace partition
The radiation workplace of the inspection system is partitioned as follows.
a) For inspection systems for cargo vehicles or cargoes without driver driving, the radiation source chamber and the surrounding dose equivalent rate should be greater than 40 μSv/h
Of the area designated as the control area. The area around the control area with an equivalent dose rate greater than 2.5 μSv/h is designated as the supervisory area;
b) For inspection systems for freight vehicles driven by drivers, the radiation source and useful harness zones shall be not less than 1 m from the central axis
Of the area designated as the control area. The area around the control area with an equivalent dose rate greater than 2.5 μSv/h is designated as the supervisory area;
c) for the driver of the freight train inspection system, the radiation source room and the useful harness area on both sides from the central axis of not less than 10m
Of the area designated as the control area. The area around the control area with an equivalent dose rate greater than 2.5 μSv/h is designated as the supervisory area;
d) with the radiation source installed in the same car system control room designated as the supervision area.
5.2 Radiation safety signs
In the radiation source enclosure, the radiation workplace boundary shall be provided with an ionizing radiation warning sign. The ionizing radiation warning sign should be met
GB 18871-2002 Appendix F related requirements.
6 Radiation level control requirements
6.1 Personal dose
Inspection system staff occupational exposure and public exposure dose limit should be consistent with the requirements of GB 18871, and the development of annual dose management
Target value.
6.2 Radiation source box leakage radiation level
6.2.1 Accelerator Radiation Source Box
No acceleration of the building block inspection system in the accelerator radiation source box, accelerator leakage rate should not be greater than 2 × 10-5; other circumstances
Should not be greater than 1 × 10-3.
6.2.2 γ radiation source box
The radiation level of the gamma radiation source box shall not exceed the values specified in Table 1.
Table 1 γ radiation source outside the box around the dose of radiation dose control value of the unit in milliseconds per hour
Check the system type from the outer surface of the box 5cm from the source box outside the surface of 1m
Fixed 1 0.1
Mobile 0.5 0.02
6.2.3 Neutron Radiation Source Box
Neutral radiation source outside the tank leakage radiation level should meet the relevant requirements of 6.3 and 8.4.1.
6.3 place radiation level
6.3.1 Dose Equivalent Rate around Boundary
The equivalent dose rate at the boundary of the inspection system should not be greater than 2.5μSv/h.
6.3.2 Driver position once through the surrounding dose equivalent
For the inspection system of a freight vehicle or train operated by a driver, the surrounding dose equivalent of the driver's position shall not be greater than
0.1μSv.
6.3.3 Dose Equivalent Rate around Control Room
Check the system control room around the dose equivalent rate should not be greater than 2.5μSv/h, the operator operating position around the dose equivalent rate should be
Not more than 1.0μSv/h.
7 Radiation safety facility requirements
7.1 Safety interlock
7.1.1 Beam control switch
In the inspection system console should be equipped with beam control switch. The ray can only be generated when the beam control switch is in the working position
Or out of the beam.
7.1.2 Door interlock
All radiation source doors, access to the control area of the door and the radiation source box outside the protective cover should be set up interlock device, with the radiation source installed in the same
The door of the system control room on a car should also be provided with interlocks. When any of the above doors or covers are open, the rays can not be produced or burnt.
7.1.3 Emergency stop device
In the inspection system console, radiation source box, etc. should be set clear identification of the emergency stop device, such as emergency stop button, emergency stop pull
Off, etc., in an emergency situation immediately interrupt the work of the radiation source. When any emergency stop device is triggered, the inspection system should stop immediately
Beam, and only through the local reset to restart the radiation source.
7.1.4 Accelerator Output Dose Interlock
When the accelerator output dose of the X-ray inspection system exceeds the predetermined value, the accelerator should be able to automatically stop the beam.
7.2 Other safety devices
7.2.1 sound and light alarm safety devices
Inspection system The workplace should be equipped with sound and light alarm safety devices to indicate the status of the inspection system, including at least beam and standby
status. When checking the system out of the beam, the red lights flashing, alarm bell.
7.2.2 Monitoring device
Inspection system Radiation workplaces should be set up for surveillance cameras to observe the presence of personnel in the radiation workplace and equipment operation
status.
7.2.3 Voice broadcast equipment
In the inspection system console should be set up voice broadcast equipment, radiation in the workplace set up speakers to remind the scene staff attention
And evacuate the radiation workplace.
7.2.4 Radiation monitoring instruments
According to the characteristics of the inspection system, equipped with the following appropriate radiation monitoring instruments.
a) personal dose alarm and dose rate of the instrument;
b) In the X-ray inspection system, the radiation dose monitoring instrument should be configured to monitor the output dose in real time,
The output dose rate is displayed on the system console.
c) The radiation source box of the gamma ray inspection system shall be equipped with a dose alarm device which, when the source of the radioactive source leaves, exceeds the alarm threshold
Real-time alarm.
7.3 Additional requirements for inspection systems for freight vehicles driven by drivers
7.3.1 Automatic driver avoidance and protection measures
Inspection system should be set to avoid and protect the measures to avoid the driver by the useful wiring harness. These measures should include at least.
a) to determine whether access to the inspection channel for the vehicle facilities. only when the type of inspection vehicle is allowed to enter the inspection channel, the inspection system
Can be out of the beam; pedestrians through the inspection channel, the inspection system can not beam;
b) Vehicle position automatic detection facility. control the inspection process and ensure that the driver's driving position has left the control area after the system can be beam;
c) Automatic speed detection, parking, reversing protection facilities. at the speed below the minimum allowable speed, as well as parking, reversing the case, check
The system can not beam or immediately stop beam;
d) Burst time protection measures. Check the system continuous beam time to reach a predetermined value, it should automatically stop the beam.
7.3.2 Warning signs
Radiation workplace should be prominently set with the following warning signs.
a) can check the type of vehicle or check the type of warning. to remind and correctly guide the driver, can check the normal passage of vehicles, other vehicles prohibited access;
b) speed limit identification. clear the vehicle speed and the upper limit of the upper limit;
c) keep the car from the warning. to remind the vehicle driver to be checked and keep a certain distance to avoid accidents;
d) "prohibit parking, prohibit reversing", "prohibit someone inside the box" and other warnings. warning the driver to prevent the cargo compartment was mistakenly irradiated;
e) prohibit the walk through the warning. to prohibit unrelated personnel walking or car into the inspection channel.
7.4 Additional requirements for inspection systems for passenger trains that drive
7.4.1 Automatic driver avoidance and protection measures
Inspection system should be set to avoid and protect the measures to avoid the driver by the useful wiring harness. These measures should include at least.
a) Freight train automatic identification facility. Check the system only if the permitted type of freight train passes the inspection channel
Check the passenger train or pedestrian through the inspection channel, the inspection system can not beam;
b) Train position automatic detection facility. control the inspection process and ensure that the driver's driving position has left the control area and check the system
Out of the beam
c) Automatic speed detection and parking protection facilities. When the vehicle speed is lower than the minimum speed allowed or the parking system can not be closed
Or immediately stop the beam;
d) Burst time protection measures. check the system continuous beam time exceeds a predetermined value, it should automatically stop the beam.
7.4.2 Warning signs
Radiation workplace should be prominently set with the following warning signs.
a) speed limit identification. clear the vehicle speed and the upper limit of the upper limit;
b) prohibit walking through the warning. to prohibit unaccompanied personnel through or into the inspection channel.
7.5 Additional requirements for gamma ray inspection systems
7.5.1 The level of sealed radioactive source, according to the sealed radioactive source activity should meet the requirements of GB 7465. The safety performance of sealed radioactive sources should be consistent
GB 4075.
7.5.2 Only in the power conditions, check the system shutter to open; power, the shutter automatically shut down.
7.5.3 The radiation source chamber (box) door can only be opened if the shutter is closed.
7.5.4 Radioactive sources Work and storage places should be equipped with fire protection, anti-theft or anti-damage and other security facilities.
7.5.5 The site should be equipped with appropriate emergency equipment, such as when the shutter control failure can manually shut down the device and other special tools.
7.6 Other requirements
Radiation source room should be well ventilated to ensure that the concentration of ozone below 0.3mg/m3. According to the possible concentration of ozone and work
It is necessary to determine the exhaust rate of the ventilation system.
8 operational requirements
8.1 General requirements
8.1.1 Staff members shall remain outside the supervisory area unless work is required.
8.1.2 Daily inspection Before the system is operated, the operator shall check in accordance with the relevant requirements in Table A.1 to confirm that it is in a normal state.
8.1.3 Before each inspection system, the operator can confirm that no radiation is available in the control area before opening the radiation source.
8.1.4 When entering the radiation workplace, the operator shall confirm that the radiation source is in a non-beamed state and carry a personal dose alarm.
8.1.5 During the operation of the inspection system, the operator should observe the situation in the radiation workplace through the monitor and find that the abnormality is immediately
Stop the beam, to prevent accidents.
8.1.6 Check the system failure or use the emergency stop device after the emergency shutdown, not found in the cause and maintenance before the end of the prohibition of re-start
Dynamic radiation source.
8.1.7 Check the system after the end of a day, the operator should remove the beam control switch key to pay the safety management personnel to keep and do
Good security record.
8.2 Installation and maintenance requirements
8.2.1 Check the installation and commissioning of the system personnel, in addition to receiving radiation protection training and examination of qualified, but also through the equipment manufacturers
Professional and technical training qualified before the relevant installation, commissioning and maintenance work.
8.2.2 In the equipment commissioning and maintenance process, if you need to lift the security interlock, you should first get the safety management approval, and set the eye-catching
warning sign. After the work is over, the operator should first restore the safety interlock and confirm that the inspection system is normal before use.
8.3 Additional requirements for gamma ray inspection systems
8.3.1 Check the system after the end of the work, the application of radiation dosimeter to check the location of the radio and the shutter state.
8.3.2 Check that the dose rate around the area where the non-staff can reach the area should be less than 2.5μSv/h when the system is not working.
8.3.3 The source of the radioactive source from the transport container or the transfer from the source container into the transport container shall be provided with an auxiliary means for facilitating the transfer operation
Equipment and a certain shielding effect of the device. The dose accepted by the operator during a commutation should not exceed 500 μSv.
8.3.4 The replaced decommissioned radioactive sources shall be recovered by the radioactive source supply unit or disposed of in accordance with the relevant provisions of the State.
8.3.5 Sealed radioactive sources shall comply with the relevant requirements of GB 11806.
Additional requirements for neutron inspection systems
8.4.1...
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