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:
lly operated isolation valves separate non-RTNSS portions and components from the RTNSS components. RTNSS C: applies for defense-in-depth functions in order to meet NRC safety goal guidelines. Replace paragraph 5. A with the following: 9.2.7-18 Draft Revision 0 – July 2014 Important chilled water system portions are identified correctly and can be isolated from the non-essential portions. The P&IDs are reviewed for whether they clearly indicate the physical division between each portion and indicate classification changes. System drawings are reviewed for whether they show the means for accomplishing isolation, and the SAR description is reviewed for minimum performance of the isolation valves. The drawings and description are reviewed for whether automatically operated isolation valves separate non-RTNSS portions of the system and system components from the RTNSS components. B. Chilled water system portion, including the isolation valves separating seismic Category I portions from the nonseismic, are Quality Group C and seismic Category I. System design bases and criteria and the component classification tables are reviewed for whether the heat exchangers, pumps, valves, and piping of essential system portions are designed to seismic Category I requirements in accordance with the applicable design criteria. The review of seismic design and quality group classification is as indicated in subsection I of this SRP section. RTNSS B: applies, since RTNSS B SSCs are considered risk-significant. Replace paragraph 5.B with the following: Important VWS portions meet seismic Category II design requirements. System design bases and criteria and the component classification tables are reviewed for whether the heat exchangers, pumps, valves, and piping of important system portions are designed to seismic Category II requirements in accordance with the applicable design criteria. The review of seismic design and quality group classification is as indicated in Subsection I of