Document: NUREG-0800
Document ID: 699a9305-58fa-49b3-a98b-91c32f0e0a00
Document Type: srp
Title: INSERVICE INSPECTION OF CLASS 2 AND 3 COMPONENTS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350276.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6.6
CFR Part: 
CFR Title: 

Content:
stulated Piping Failures High-energy fluid system piping between containment isolation valves should receive an augmented ISI as follows: a. Protective measures, structures, and guard pipes should not prevent the access required to conduct the inservice examinations specified in the Code, Section XI, Division 1. b. For those portions of high energy fluid system piping between containment isolation valves, the extent of inservice examination completed during each inspection 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 IWC-1220 of the Code. 6.6-4 Rev. 1 - July 1981 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. III. REVIEW PROCEDURES The reviewer will select and emphasize material from the procedures described below, as may be appropriate for a particular case. For each area of review the following review procedure is followed: 1. Components Subject to Inspection The applicant's or licensee's components and system classifications under Class 2 are reviewed for agreement with subsection 11.1 of this SRP sec- tion.