Document: NUREG-0800
Document ID: b5ea3f55-f54e-45cf-b921-3944d12b4ce2
Document Type: srp
Title: REACTOR AUXILIARY COOLING WATER SYSTEMS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350545.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.2.2
CFR Part: 
CFR Title: 

Content:
sign classifications for structures and systems. b. The essential portions of the CWS are protected from the effects of floods, hurricanes, tornadoes, and internally- or externally-generated missiles. Flood protection and missile protection criteria are discussed and evaluated in detail under the SRP sections for Chapter 3 of the SAR. The reviewer will use the procedures identified in these SRP sections to ensure that the analyses presented are valid. A statement to the effect that the system is located in a seismic Category I structure that is tornado missile and flood protected or that components of the system will be located in individual cubicles or rooms that will withstand the effects of both flooding and missiles is acceptable. The location and design of the system, structures, and pump rooms (cubicles) are reviewed to determine that the degree of protection provided is adequate. 6. The descriptive information, P&IDs, CWS drawings, and failure-modes and -effects analyses in the SAR are reviewed to ensure that essential por- tions of the system will function following design basis accidents assuming a concurrent single, active component failure. The reviewer evaluates the information presented in the SAR to determine the ability of required components to function, traces the availability of these com- ponents on system drawings, and checks that the SAR information contains verification that minimum system flow and heat transfer requirements are met for each accident situation for the required time spans. For each case, the design will be acceptable if minimum system requirements are met. 7. The SAR is reviewed to assure that the applicant has committed to address the potential for water hammer in the auxiliary cooling water systems and will provide means for prevention, or avoidance, such as venting and filling capability and operating procedures for avoidance of water hammer. IV. EVALUATION FINDINGS The reviewer verifies that sufficient information has been