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:
ts 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 VWSs 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 (Ref. 21). RTNSS B: applies for nonsafety-related functions in the post-72 hour period. RTNSS C: applies for nonsafety-related defense-in-depth functions in order to meet NRC safety goal guidelines. Nonsafety-related nonrisk-significant: Water hammer is reviewed to the extent that consequences from a water hammer do not negatively affect safety-related SSCs or RTNSS B SSCs. 10. To address concerns about VWS equipment operability and containment integrity during DBA conditions, the primary review organization verifies whether the applicant addresses the following VWS design provisions consistently with GL 96-06 and GL 96-06, Supplement 1 (Ref. 20): 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. RTNSS B and C: Passive designs are not expected to have this design feature. 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. RTNSS B and C: Passive designs are not expected to have this design feature. C. Capability of isolated water-filled sections of piping in containment to withstand thermally-induced overpressurization. RTNSS B: applies for nonsafety-related functions in the post-72 hour 9.2.7-27 Draft Revision 0 – July 2014 period. RTNSS C: applies for nonsafety-related defense-in-depth functions in order to meet NRC safety goal guidelines. Nonsafety-related nonrisk-significant: applies. 11. For