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:
s during accident conditions with the appropriated design margins (including considerations for heat exchanger tube plugging and fouling) for adequate operations. A comparative analysis is made of the system flow rates, heat levels, maximum temperature, and heat removal capabilities with similar designs previously found acceptable. An independent analysis may verify system performance characteristics. RTNSS B and C: applies, since RTNSS B and C SSCs are considered risk-significant. Design margins, such as system heat loads, pump and heat exchanger performance, pump net positive suction head requirements, are reviewed. Replace paragraph 5.D with the following: The system is designed for removal of heat loads during normal operation and for RTNSS functions. However, for RTNSS functions, margins in system flow rates, heat levels, maximum temperature, and heat removal capabilities are reviewed. The reviewer may consider conducting an audit of the supporting calculations. 9.2.7-20 Draft Revision 0 – July 2014 Nonsafety-related nonrisk-significant: may apply. Functions that support achieving and maintaining CSD conditions are reviewed for reliability of systems and components. Replace paragraph 5.D with the following: The system is designed for removal of heat loads during normal operation and for CSD functions. However, for CSD functions heat removal capabilities are reviewed. E. Design provisions permit appropriate in-service inspection and functional testing of system components important to safety. The SAR information delineates a testing and inspection program, and the system drawings show the necessary test recirculation loops around pumps or isolation valves necessary for this program. RTNSS B and C: does not directly apply, since RTNSS B and C SSCs are considered risk-significant. Testing and in-service inspection are elements of the RAP. Also, surveillance testing is done for items in the Availability Controls Manual. Alternative criteria are addressed in SRP