Document: NUREG-0800
Document ID: 6fd4d885-bb73-4ac0-9513-7365558c831e
Document Type: srp
Title: REACTOR AUXILIARY COOLING WATER SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070550053.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.2.2
CFR Part: 
CFR Title: 

Content:
ng and ensures appropriate provision of isolation capabilities in failure. Reference to SAR Chapter 2, describing site features and the general arrangement and layout drawings, is necessary as well as the SAR tabulation of seismic design classifications for structures and systems. B. Essential CWS portions are protected from the effects of floods, hurricanes, tornadoes, and internally- or externally-generated missiles. Flood protection and missile protection criteria are evaluated in detail under the SRP sections for SAR Chapter 3. The reviewer uses the procedures 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 tornado-, missile-, and flood-protected or that system components are located in individual cubicles or rooms that withstand both flooding and missiles is acceptable. The location and design of the system, structures, and pump rooms (cubicles) are reviewed for whether the degree of protection is adequate. 9.2.2-12 Revision 4 - March 2007 6. The SAR descriptive information, P&IDs, CWS drawings, and failure-modes and -effects analyses are reviewed by the primary review organization for whether essential portions of the system function following design-basis accidents, assuming a concurrent single, active component failure. The reviewer evaluates the SAR information to determine the ability of required components to function, traces the availability of these components on system drawings, and checks that the SAR information verifies that minimum system flow and heat transfer requirements are met for each accident situation for the required time spans. For each case, the design is acceptable if it meets minimum system requirements. 7. The SAR is reviewed by the primary review organization for whether the applicant commits to address the potential for water hammer in the auxiliary CWSs and provides means for prevention or avoidance (e.g., venting and