Document: NUREG-0800
Document ID: 92d817ac-3ce3-4cf7-8d1a-627e8242fbf2
Document Type: srp
Title: PLANT DESIGN FOR PROTECTION AGAINST POSTULATED PIPING FAILURES
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070312.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.6.1
CFR Part: 
CFR Title: 

Content:
opriate plant arrangement drawings, locates the postulated break locations specified in the applicant's analyses, and determines all locations where the effects from the breaks or leaks interface with safety-related equipment. The reviewer then determines that at these locations, enclosures have been provided that protect the safety-related equipment. Where questions as to break locations arise, the reviewer consults the EMEB for a determination on the proper locations. c. For cases where neither physical separation nor protective enclosures are considered practical by the applicant, the SPLB will review the SAR information to verify the following: (1) The reasons for which the applicant judged both physical separation and system enclosure to be impractical as means of protection are consistent with item B.1.c of BTP SPLB 3-1. (2) Redundant design features or additional protection have been provided in these situations and are such that failure modes and effects analyses for all failure situations show that the performance of safety features will be DRAFT Rev. 3 - April 1996 3.6.1-6 assuredensured, assuming a single active failure in any required system. These analyses are done under the criteria and assumptions of item B.3 of BTP SPLB 3-1. Special measures taken to provide additional protection are reviewed on an individual case basis, with assistance from the other review branches as needed. 2. SPLB reviews the information presented in the SAR that identifies the principal design features. The reviewer performs his the evaluation by comparing the design basis 16 information given in the SAR with that described in item B.2 of BTP SPLB 3-1. By this comparison of individual design features, the reviewer verifies as follows that the necessary measures have been provided by the applicant in his applicant's design. 17 a. SPLB, with assistance from ESGBECGB and EMEB, reviews the design 18 features provided for protective structures or compartments, fluid system piping