Document: NUREG-0800
Document ID: 5cdeed4a-6cd5-4840-90c0-5159fbf2c9f0
Document Type: srp
Title: CHILLED WATER
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1409/ML14093A350.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.2.7
CFR Part: 
CFR Title: 

Content:
may be 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 finding that the system is located in a seismic qualified (Category I or II) tornado-, missile-, and flood-protected structure 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. 8. The SAR descriptive information, P&IDs, VWS 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. RTNSS B: applies. RTNSS B SSCs are considered risk-significant. RTNSS B SSCs do not need to operate during accident conditions, but are required to operate for the post-72 hour period. Failure-modes and effects analyses are not performed. Replace paragraph 8 with the following: The SAR descriptive information, P&IDs and VWS drawings are reviewed by the primary review organization for whether the system function, assuming a concurrent single active component failure. The reviewer evaluates the SAR information to determine the ability of required components to