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:
nder those loads and conditions thereof for which level A and level B stress 4 limits have been specified in the system's Design Specification, including an OBE event per paragraph NB-3653 of the ASME Code, Section III. DRAFT Rev. 2 - April 1996 3.6.2-16 guard pipe assembly should be designed to meet the following requirements and tests: (a) The design pressure and temperature should not be less than the maximum operating pressure and temperature of the enclosed pipe under normal plant conditions. (b) The design stress limits of Paragraph NE-3131(c)Level C stress limits in NE-3220, ASME Code, Section III, should not be 66 exceeded under the loading associated with containment design pressure and temperature in combination with the safe shutdown earthquake. (c) Guard pipe assemblies should be subjected to a single pressure test at a pressure not less than its design pressure. (d) Guard pipe assemblies should not prevent the access required to conduct the inservice examination specified in B.1.b.(7). Inspection ports, if used, should not be located in that portion of the guard pipe through the annulus of dual barrier containment structures. (7) A 100% volumetric inservice examination of all pipe welds should be conducted during each inspection interval as defined in IWA-2400, ASME Code, Section XI. c. Postulation of Pipe RuptureBreaks in Areas Other Than Containment 67 Penetration (1) With the exceptions of those portions of piping identified in B.1.b, breaks in Class 1 piping (ASME Code, Section III) should be postulated at the following locations in each piping and branch run: (a) At terminal ends.2368 (b) At intermediate locations where the maximum stress range as calculated by Eq. (10) and either (12) or (13)and either 4269 Eq. (12) or Eq. (13) exceeds 2.4 S . 70 m Stresses under those loads and conditions thereof for which level A and level B stress limits 5 have been specified in the System's Design Specification, including an OBE event as calculated by Eq. (9)