NB/T 20003.1-2021 Non-destructive testing for mechanical components in nuclear island of nuclear power plants - Part 1: General requirements
1 Scope
This document specifies the general requirements and principles for use of ultrasonic testing, radiographic testing, penetrant testing, magnetic particle testing, eddy current testing, visual testing and leak testing of mechanical components in nuclear island of nuclear power plants.
This document is applicable to non-destructive testing during the manufacture and installation of mechanical components in nuclear island of nuclear power plants.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
NB/T 20003.2 Non-destructive testing for mechanical components in nuclear island of nuclear power plants - Part 2: Ultrasonic testing
NB/T 20003.3 Non-destructive testing for mechanical components in nuclear island of nuclear power plants - Part 3: Radiographic testing
NB/T 20003.4 Non-destructive testing for mechanical components in nuclear island of nuclear power plants - Part 4: Penetrant testing
NB/T 20003.5 Non-destructive testing for mechanical components in nuclear island of nuclear power plants - Part 5: Magnetic particle testing
NB/T 20003.6 Non-destructive testing for mechanical components in nuclear island of nuclear power plants - Part 6: Eddy current testing
NB/T 20003.7 Non-destructive testing for mechanical components in nuclear island of nuclear power plants - Part 7: Visual testing
NB/T 20003.8 Non-destructive testing for mechanical components in nuclear island of nuclear power plants - Part 8: Leak testing
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
NDT method
application of physical or chemical principles in nondestructive testing
3.2
NDT technique
specific way for application of NDT method
3.3
NDT procedure
written document describing how to regulate the use of an NDT technique
3.4
indication
sign and response resulted from application of NDT method
3.5
discontinuity
lack of continuity or combination, artificial or non-artificial discontinuity in the physical structure or shape of a material or workpiece
3.6
imperfection
deviation of the quality characteristics, compared with the expected condition
3.7
defect
imperfection and discontinuity that affect the product structure and damage its adaptability
3.8
false indication
indication caused by conditions other than discontinuity or imperfection, the form of which depends on the NDT method used
3.9
interpretation
determination of correlation, noncorrelation, or false indication
Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Use principles 5 General requirements 6 Record, evaluation and quality grading 7 Testing records and reports Annex A (Informative) Comparison table of defects and NDT methods
