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:
e locations and types of failures to be considered and the dynamic effects associated with the failures are reviewed by the EMEB under SRP Section 3.6.2. a. SPLB reviews analyses of piping failures in high and moderate energy fluid systems postulated according to the guidelines of B.3.a of BTP SPLB 3-1. SPLB reviews resulting environmental conditions resulting from postulated piping failures. b. SPLB reviews the assumptions made in the analyses with regard to: (1) The availability of offsite power. (2) The failure of a single active component in systems used to mitigate the consequences of the piping failure. (3) The special provisions applicable to certain dual purpose systems. (4) The use of available systems to mitigate the consequences of the piping failure. c. SPLB reviews the effects of postulated failures on the habitability of the control room and access to areas important to safe control of postaccident operations. d. SPLB reviews the effects of piping failures in systems not designed to seismic Category I standards on essential systems and components. e. SPLB reviews the environmental effects of pipe rupture, such as temperature, humidity, and spray-wetting with respect to the functional performance of essential electrical equipment and instrumentation as part of its primary review responsibility for SRP Section 3.11. In addition, the SPLB will coordinate other branches evaluations that interface with the overall review of the system as follows: 1. The Reactor Systems Branch (SRXB) reviews the design of systems and components that interface with the reactor coolant system with regard to prevention or mitigation of intersystem loss-of-coolant accidents (ISLOCA) as part of its primary review responsibility for SRP Section 3.12 (proposed).8 2. If an applicant proposes to use leak-before-break technology to exclude the dynamic effects of postulated pipe ruptures from the design basis of plant structures, systems and components, the Materials and Chemical