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GB/T 34641-2017: Non-destructive testing -- Test method for determining image quality in direct thermal neutron radiographic examination
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Non-destructive testing -- Test method for determining image quality in direct thermal neutron radiographic examination
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GB/T 34641-2017
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Basic data | Standard ID | GB/T 34641-2017 (GB/T34641-2017) | | Description (Translated English) | Non-destructive testing -- Test method for determining image quality in direct thermal neutron radiographic examination | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J04 | | Classification of International Standard | 19.100 | | Word Count Estimation | 10,113 | | Date of Issue | 2017-09-29 | | Date of Implementation | 2018-04-01 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | GB/T 34641-2017: Non-destructive testing -- Test method for determining image quality in direct thermal neutron radiographic examination
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Non-destructive testing - Test method for determining image quality in direct thermal neutron radiographic examination
ICS 19.100
J04
National Standards of People's Republic of China
Non-destructive testing
Determination of image quality by direct thermal neutron photogrammetry
2017-09-29 Posted
2018-04-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
China National Standardization Administration released
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard by the National Standardization Technical Committee nondestructive testing (SAC/TC56) and focal point.
This standard drafting unit. Institute of Nuclear Physics and Chemistry Chinese Academy of Engineering Physics, Beijing Institute of Aeronautical Materials, Shanghai Materials Research
By, Peking University, China Institute of Atomic Energy, China Southern Aerospace Science and Technology Corporation Chuannan Machinery Factory.
The main drafters of this standard. Tang Bin, Sun Yong, Huo Yong, Wu Yang, Guo Guangping, Zou Yubin, Guo Yu, Chen Dongfeng, Jinyu Fei, Zhang Zheng, Li Hang,
Cao Chao, Wang Sheng, Han Songbai, Wei Guohai, Yin Wei, Zhu Shilei, Tang Ke, Liu Bin, Xie Jun.
Non-destructive testing
Determination of image quality by direct thermal neutron photogrammetry
1 Scope
This standard specifies the direct thermal neutron photographic detection of quality measurement methods, including the method summary, significance and purpose, the basis of application, testing
Process, image quality level, determination of exposure composition, direct thermal neutron imaging process control, recording and accuracy.
This standard applies to the use of image quality film photographic images of direct thermal neutron photographic equipment, photo quality and performance rating.
NOTE The purpose of this standard is not to address the safety issues associated with its use. Users of this standard have the responsibility to develop the appropriate safety protection before use
Methods, and determine the scope of application of the regulations.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version applies to this article
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 12604.8 Non-destructive testing term neutron detection
Nondestructive testing - Determination of L/D ratio of neutron beams by thermal neutron imaging GB/T
Non-destructive testing - Thermal neutron radiographic testing General and basic rules
3 Terms and definitions
GB/T 12604.8 defined and the following terms and definitions apply to this document.
3.1
Image quality indicator; IQI
A combination of devices or devices whose images on a neutron radiograph can provide visualization of the quality of the neutron radiographic images
Or quantitative information, or both.
Note. This standard includes beam purity indicator and sensitivity indicator two quality indicators.
3.2
Beam purity indicator beampurityindicator; BPI
For quantitative evaluation of neutron beam quality, polytetrafluoroethylene block as the base, embedded two boron nitride wafer, two lead wafer and two cadmium
Great device. see picture 1.
3.3
Sensitivity indicator;
Visual sensitivity for quantitative determination of visible detail on neutron radiographic images, consisting of a step wedge containing gaps and holes of known dimensions
Device. See Figure 2.
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