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:
s adequate. 8. 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 9.2.7-19 Revision 0 – September 2015 spans. For each case, the design is acceptable if it meets minimum system requirements. 9. The SAR is reviewed by the primary review organization for whether the applicant commits to address the potential for water hammer in the CWS and provides means for prevention or avoidance (e.g., venting and filling capability) of water hammer and operating procedures for avoidance of water hammer. Guidance for water hammer prevention and mitigation is in NUREG-0927. 10. To address concerns about CWS equipment operability and containment integrity during design-basis accident conditions, the primary review organization verifies whether the applicant addresses the following CWS design provisions consistently with GL 96-06 and GL 96-06, Supplement 1. A. Capability of cooling water systems serving the containment air coolers to withstand the hydrodynamic effects of water hammer and to satisfy system design and operability requirements. B. Capability of cooling water systems serving the containment air coolers to meet heat removal assumptions for design-basis accident scenarios, even during two-phase flow conditions. C. Capability of isolated water-filled sections of piping in containment to withstand thermally-induced overpressurization. 11. For review of a DC application, the reviewers should follow the procedures outlined in