Document: NUREG-0800
Document ID: 6237521d-c825-4ed6-8fb7-7b3b8019a3fc
Document Type: srp
Title: SYSTEM QUALITY GROUP CLASSIFICATION
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070297.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.2.2
CFR Part: 
CFR Title: 

Content:
specified as supplementary types of examinations, Paragraph 136.4 in ANSI B31.1-1973.128 2b. All fillet and socket welds shall be examined by either magnetic particle or liquid penetrant methods. All structural attachment welds to pressure retaining materials shall be examined by either magnetic particle or liquid penetrant methods. Examination procedures and acceptance standards shall be at least equivalent to those specified as supplementary types of examinations, Paragraph 136.4 in ANSI B31.1-1973.129 3c. All inspection records shall be maintained for the life of the plant. These records shall include data pertaining to qualification of inspection personnel, examination procedures, and examination results. Acceptable design and classifications for BWR main steam piping and components, 4 including those comprising main steam isolation valve leakage hold-up and retention paths, as illustrated in Figure A-1, are as follows: a. The "First Valve" in Table A-1, Item 2 refers to the first normally closed valve. b. The main steam line piping from the outermost containment isolation valve up to the seismic interface restraint should be classified as seismic Category I, as should connecting branch lines up to the first normally closed valve. The seismic interface restraint must provide a structural barrier between the seismic Category I portions of main steam piping in the reactor building and non-seismic Category I portions of such piping in the turbine building. The seismic interface restraint must be located inside a seismic Category I building. Main steam line piping from the seismic interface restraint up to, but not including the turbine stop valve (including branch lines to the first normally closed valve) and steam drain line piping from the outermost containment isolation valve to the condenser hotwell should be classified and analyzed as described in 4.c below. All pertinent quality assurance requirements of Appendix B to 10 CFR Part 50 apply to the main steam