Document: NUREG-0800
Document ID: b1bccb14-17b6-422b-93ee-6d4f00b6512b
Document Type: srp
Title: CHILLED WATER SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1510/ML15103A559.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.2.7
CFR Part: 
CFR Title: 

Content:
B RTNSS C All Other Nonsafety-Related classifications for structures and systems. Section III, Item 7B: CWS portions are protected from the effects of floods, hurricanes, tornadoes, and internally or externally-generated missiles consistent with the guidance in SRP 19.3. 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 finding that the system is located in a seismically qualified Category I structure that is extreme wind-, 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. X X Section III, Item 8: For RTNSS B or C SSCs, the SAR descriptive information, P&IDs, and CWS drawings, are reviewed. 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 defense-in-depth function. For each case, the design is acceptable if it meets minimum system requirements. RTNSS B SSCs should additionally consider the effects of a single active component failure. Section III, Item 8 is applicable to nonsafety-related SSCs that are credited for cold shutdown conditions, in the post-72 hour period. X X X Section III.9 applies. Nonsafety-related SSCs are reviewed to the extent that consequences from a water hammer do not negatively affect safety-related SSCs or RTNSS B SSCs X X X Section III, Item 10A: is not applicable to nonsafety-related SSCs 9.2.7-24 Revision 0 – September 2015 Review Procedure: RTNSS B RTNSS C All Other Nonsafety-Related Section