Document: NUREG-0800
Document ID: b3748a15-3b80-4626-a0a5-eb9f270739ad
Document Type: srp
Title: DETERMINATION OF RUPTURE LOCATIONS AND DYNAMIC EFFECTS ASSOCIATED
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340555.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.6.2
CFR Part: 
CFR Title: 

Content:
assified as part of a main run in the stress analysis and is shown to have a significant effect on the main run behavior. In piping runs which are maintained pressurized during normal plant conditions for only a portion of the run (i.e., up to the first normally closed valve) a terminal end of such runs is the piping connection to this closed valve. 3Stress range under those loads and conditions thereof for which level A and level B stress limits have been specified in the system's Design Specification, including an OBE event per paragraph NB-3653 of the ASME Code, Section III. 4Stresses under those loads and conditions thereof for which level A and level B stress limits have been specified in the System's Design Specification, including an OBE event as calculated by Eq. (9) and (10), Paragraph NC/ND-3652 of the ASME Code, Section III. 3.6.2-13 Rev. 1 - July 1981 (2) With the exceptions of those portions B.1.b, breaks in Class 2 and 3 piping should be postulated at the following of each piping and branch run: of piping identified in (ASME Code, Section III) locations in those portions (a) At terminal ends. (b) At intermediate locations selected by one of.the following criteria: (I) At each pipe fitting (e.g., elbow, tee, cross, flange, and nonstandard fitting), welded attachment, and valve. Where the piping contains no fittings, welded attach- ments, or valves, at one location at each extreme of the piping run adjacent to the protective structure. (ii) At each location where the stresses4 exceed 0.8 (1.2 Sh + SA) but at not less than two separated locations Where the fittings, are below chosen on chosen on the basis of highest stress.5 piping consists of a straight run without welded attachment, or valves, and all stresses 0.8 (1.2 S + S ), a minimum of one location the basis Of hiohest stress. As a result of piping reanalysis, the highest stress locations may be shifted; however, the initially determined intermediate break locations may be used unless one of the