Document: NUREG-0800
Document ID: 38c9e70d-6fc5-48a9-8504-06ce4c699bb8
Document Type: srp
Title: INSERVICE INSPECTION OF CLASS 2 AND 3 COMPONENTS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070450.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6.6
CFR Part: 
CFR Title: 

Content:
on interval should provide 100% volumetric examination of circumferential and longitudinal pipe welds within the boundary of these portions of piping. c. For those portions of high-energy fluid system piping enclosed in guard pipes, inspection ports should be provided in the guard pipes to permit the required examination of circumferential pipe welds. Inspection ports should not be located in that portion of the guard pipe passing through the annulus of dual barrier containment structures. d. The areas subject to examination should be defined in accordance with Examination Categories C-F and C-G for Class 2 piping welds in Article IWC-2000. 8. Code Exemptions The applicant or licensee should list the exemptions from Code examination requirements that have been permitted by Subsubarticles IWC- or IWD-1220, "Components Exempt from Examination," of the Code. 58 9. Relief Requests Request for relief from the ASME Code Section XI examination requirements which are found to be impractical due to the limitations of design, geometry, or materials of construction of components are evaluated in accordance with Section 50.55a of 10 CFR Part 50. 6.6-7 DRAFT Rev. 2 - April 1996 Technical Rationale59 The technical rationale underlying the application of the above stated acceptance criteria for the inservice inspection programs of ASME Code Class 2 and Code Class 3 systems is discussed in the following paragraphs. 1. 10 CFR 50.55a, "Codes and Standards," requires, in paragraph (a)(1), that structures, systems and components (SSCs) be designed, fabricated, erected, constructed, tested, inspected and maintained to quality standards commensurate with the importance of the safety function they are intended to perform. 10 CFR 50.55a(b) incorporates, by reference, the ASME Boiler and Pressure Vessel Code. Throughout the service life of a boiling or pressurized water cooled nuclear power reactor, its Code Class 2 and Class 3 systems and components must meet the requirements of Section XI