Document: NUREG-0800
Document ID: 645cc743-c9e4-428c-b05d-ead2517eb3fa
Document Type: srp
Title: DETERMINATION OF RUPTURE LOCATIONS AND DYNAMIC EFFECTS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070315.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.6.2
CFR Part: 
CFR Title: 

Content:
in SRP Section 3.9.3. Primary loads include those which are deflection limited by whip restraints. 3.6.2-15 DRAFT Rev. 2 - April 1996 For ASME Code, Section III, Class 2 Piping (d) The maximum stress ranges as calculated by the sum of Eqs. (9) 59 and (10) in Paragraph NC-36523, ASME Code, Section III, 60 considering those loads and conditions thereof for which level A and level B stress limits have been specified in the system's design specification (i.e., sustained loads, occasional loads, and thermal expansion), including an OBE event should not exceed 0.8(1.21.8 S + S ). The S and S are allowable stresses at 61 h A h A maximum (hot) temperature and allowable stress range for thermal expansion, respectively, as defined in Article NC-3600 of the ASME Code, Section III. (e) The maximum stress, as calculated by Eq. (9) in Paragraph NC-36523 under the loadings resulting from a postulated piping 62 failure of fluid system piping beyond these portions of piping should not exceed 1.8 S 2.25 S and 1.8 S . h h y 63 Primary loads include those which are deflection limited by whip restraints. The exceptions permitted in (c) above may also be applied, provided that when the piping between the outboard isolation valve and the restraint is constructed in accordance with the Power Piping Code ANSI B31.1 (see ASB 3-1, B.2.c(4)), the 64 piping shall either be of seamless construction with full radiography of all circumferential welds or all longitudinal and circumferential welds shall be fully radiographed. (2) Welded attachments, for pipe supports or other purposes, to these portions of piping should be avoided, except where detailed stress analyses, or tests, are performed to demonstrate compliance with the limits of B.1.b(1). (3) The number of circumferential and longitudinal piping welds and branch connections should be minimized. Where guard pipes are used, the enclosed portion of fluid system piping should be seamless construction and without circumferential welds unless