Document: NUREG-0800
Document ID: 1a3364df-d783-4da3-9f56-b8a667f8cf50
Document Type: srp
Title: CHEMICAL AND VOLUME CONTROL SYSTEM (PWR)
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350555.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.3.4
CFR Part: 
CFR Title: 

Content:
will also be reviewed to determine that it limits expected component operational degradation (e.g., pump leakage, heat exchanger scaling, resin deterioration) and describes the procedures that will be followed to detect and correct these conditions when they become excessive. The reviewer, using the results of failure modes and effects analyses, com- parisons with previously approved systems, or independent calculations, as appropriate, determines that the system can sustain the loss of any active component and meet the minimum system requirements for plant shut- down or accident mitigation. The system P&IDs, layout drawings, and com- ponent descriptions and characteristics are then reviewed for the following points: 1. Essential portions of the CVCS are correctly identified and are verified to be isolable from the nonessential portions of the system and from interfacing systems such as demineralized water makeup and radioactive waste systems. The P&IDs will be reviewed to verify that they clearly indicate physical divisions between such portions and indicate design classification changes. Systems drawings are also reviewed to see that they show the means for accomplishing isolation and the system description is reviewed to identify minimum performance requirements for the isolation valves. 2. CMEB coordinates with MEB to assure that essential portions of the CVCS, including the isolation valves separating essential portions from nonessential portions, are classified Quality Group A, B, or C and seismic Category I in accordance with the guidelines of Regula- tory Guides 1.26 and 1.29; also, system descriptions in the SAR are reviewed to verify that the above seismic and safety classifications have been included, and that the P&IDs indicate any points of change in piping quality group classification. 9.3.4-5 Rev. 2 - July 1981 3. The failure of portions of the system or of other systems not designed to seismic Category I standards and located close to essential por-