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:
re designed for normal system and abnormal in-leakage contractions and expansion without radiological consequences such as spills of CWS to the floor. X X Section III, Item 5D: The RTNSS B or C 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. Nonsafety-related functions that support achieving and maintaining CSD conditions are reviewed for reliability of systems and components. The system is designed for removal of heat loads during normal operation and for CSD functions. X X X Section III, Item 5E: does not directly apply to RTNSS; however, 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 Section 19.3 on the programmatic requirements for RTNSS with respect to inspection and testing. Section III, Item 5F: A RTNSS B system may be evaluated for protection from the effects of high-energy and moderate-energy line breaks. The system description and layout drawings are reviewed (if available) for whether no high- or moderate-energy piping systems are close to RTNSS B CWS portions, or for protection from the adverse effects of failure. The means for such protection are delineated in SAR Section 3.6, and the procedures for reviewing this information are in the corresponding SRP. X X 9.2.7-22 Revision 0 – September 2015 Review Procedure: RTNSS B RTNSS C All Other Nonsafety-Related For a RTNSS C system, the design functions are reviewed against high energy line breaks. Section III, Item 5G: RTNSS B and C components and subsystems can function as required in a LOOP and loss of instrument air systems. The system design is acceptable if the CWS meet minimum system requirements as stated in