Document: NUREG-0800
Document ID: 2200e046-1749-4aa1-a474-997b369b63b2
Document Type: srp
Title: REACTOR AUXILIARY COOLING WATER SYSTEMS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070513.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.2.2
CFR Part: 
CFR Title: 

Content:
and connecting piping are reviewed to ensure that makeup water can be supplied to either header in a split header system. Redundant surge tanks (one to each header) or a divided surge tank design are acceptable to ensure that in the event of a header rupture, the loss of the entire contents of the surge tank will not occur. d. The system is designed for removal of heat loads during normal operation and of emergency core cooling heat loads during accident conditions, with appropriate design margins to ensure adequate operation. A comparative analysis is made of the system flow rates, heat levels, maximum temperature, and heat removal capabilities with similar designs previously found acceptable. To verify performance characteristics of the system, an independent analysis may be made. e. Design provisions are made that permit appropriate inservice inspection and functional testing of system components important to safety. The applicant should ensure that The SAR information delineates a testing and inspection 60 program and the system drawings show the necessary test recirculation loops around pumps or isolation valves necessary for this program. f. Essential portions of the system are protected from the effects of high-energy and moderate-energy line breaks. The system description and layout drawings will be reviewed to ensure that no high- or moderate-energy piping systems are close to essential portions of the CWS, or that protection from the effects of failure will be provided. The means of providing such protection will be given in Section 3.6 of the SAR, and the procedures for reviewing this information are given in the corresponding SRP sections. g. Essential components and subsystems (i.e., those necessary for safe shutdown) can function as required in the event of a loss of offsite power and instrument air systems. The system design will be acceptable in this regard if the essential portions of the CWS meet minimum system requirements as stated in the SAR