GBZ 127-2002 Radiological protection standard for X-ray luggage inspection system English
1 Scope
This standard specifies the X-ray luggage inspection system (hereinafter referred to as the system) and the radiation protection technical requirements and testing/inspection requirements for its use.
This standard is applicable to cabinet X-ray systems for inspection of bags. This standard does not apply to portable small X-ray machines for inspecting luggage bags and X-ray systems for safety inspection of large containers.
2 Terms and Definitions
For the purposes of this standard, the following terms and definitions apply.
2.1
cabinet X-ray system
system equipped with X-ray tubes installed in its cabinet, used for X-ray irradiation inspection of bags entering the cabinet. When X-rays are generated, the system will shield radiation and block personnel from entering the cabinet. X-ray equipment (except modified ones) temporarily or occasionally equipped with portable protective baffles is not considered a cabinet X-ray system
2.2
external surface
external surfaces of a cabinet X-ray system, including high voltage generators, doors, covers, latches, control knobs, and other permanently mounted rigid appliance, as well as flat surfaces across apertures and ports
2.3
port
opening in the outer surface of the system that remains in an open state during X-ray irradiation, designed to transport luggage into and out of the cabinet X-ray system for irradiation, or irradiate partially the luggage due to the limitation to the volume of the luggage or the difficulty to enter the inside of the cabinet
2.4
door
barrier, movable or openable, that is designed for routine operation and generally does not require tools to be opened and enables access to the inside of the cabinet. Rigid appliance mounted on the door is also regarded part of the door
2.5
access panel
barrier or panel designed to be movable or openable for repair or maintenance purposes, which is only opened with the aid of a tool to enter the inside of the cabinet
2.6
ground fault
unexpected conductor short to ground
2.7
aperture
any opening on the outer surface of the system, except for the port that remains open during X-ray irradiation
3 Technical requirements for radiation protection of X-ray baggage inspection systems
3.1 When the system generates radiation, the specific kinetic energy release rate of air at any point 5cm away from its outer surface shall not exceed 5 μGy · h-1.
3.2 The protective thickness of a single lead rubber curtain at the port of the system shall not be less than 0.35 mm lead equivalent.
3.3 Safety interlocking in the system
Contents
Foreword i
1 Scope
2 Terms and Definitions
3 Technical requirements for radiation protection of X-ray baggage inspection systems
4 Requirements for radiation protection in use of X-ray baggage inspection systems
5 Testing and inspection requirements for X-ray luggage inspection system
Annex A (Normative) Plane diagram of radiation measurement points on the outer surface of an X-ray luggage inspection system
Standard
GBZ 127-2002 Radiological protection standard for X-ray luggage inspection system (English Version)
Standard No.
GBZ 127-2002
Status
valid
Language
English
File Format
PDF
Word Count
3000 words
Price(USD)
140.0
Implemented on
2002-6-1
Delivery
via email in 1 business day
Detail of GBZ 127-2002
Standard No.
GBZ 127-2002
English Name
Radiological protection standard for X-ray luggage inspection system
GBZ 127-2002 Radiological protection standard for X-ray luggage inspection system English
1 Scope
This standard specifies the X-ray luggage inspection system (hereinafter referred to as the system) and the radiation protection technical requirements and testing/inspection requirements for its use.
This standard is applicable to cabinet X-ray systems for inspection of bags. This standard does not apply to portable small X-ray machines for inspecting luggage bags and X-ray systems for safety inspection of large containers.
2 Terms and Definitions
For the purposes of this standard, the following terms and definitions apply.
2.1
cabinet X-ray system
system equipped with X-ray tubes installed in its cabinet, used for X-ray irradiation inspection of bags entering the cabinet. When X-rays are generated, the system will shield radiation and block personnel from entering the cabinet. X-ray equipment (except modified ones) temporarily or occasionally equipped with portable protective baffles is not considered a cabinet X-ray system
2.2
external surface
external surfaces of a cabinet X-ray system, including high voltage generators, doors, covers, latches, control knobs, and other permanently mounted rigid appliance, as well as flat surfaces across apertures and ports
2.3
port
opening in the outer surface of the system that remains in an open state during X-ray irradiation, designed to transport luggage into and out of the cabinet X-ray system for irradiation, or irradiate partially the luggage due to the limitation to the volume of the luggage or the difficulty to enter the inside of the cabinet
2.4
door
barrier, movable or openable, that is designed for routine operation and generally does not require tools to be opened and enables access to the inside of the cabinet. Rigid appliance mounted on the door is also regarded part of the door
2.5
access panel
barrier or panel designed to be movable or openable for repair or maintenance purposes, which is only opened with the aid of a tool to enter the inside of the cabinet
2.6
ground fault
unexpected conductor short to ground
2.7
aperture
any opening on the outer surface of the system, except for the port that remains open during X-ray irradiation
3 Technical requirements for radiation protection of X-ray baggage inspection systems
3.1 When the system generates radiation, the specific kinetic energy release rate of air at any point 5cm away from its outer surface shall not exceed 5 μGy · h-1.
3.2 The protective thickness of a single lead rubber curtain at the port of the system shall not be less than 0.35 mm lead equivalent.
3.3 Safety interlocking in the system
Contents of GBZ 127-2002
Contents
Foreword i
1 Scope
2 Terms and Definitions
3 Technical requirements for radiation protection of X-ray baggage inspection systems
4 Requirements for radiation protection in use of X-ray baggage inspection systems
5 Testing and inspection requirements for X-ray luggage inspection system
Annex A (Normative) Plane diagram of radiation measurement points on the outer surface of an X-ray luggage inspection system
