Document: NUREG-0800
Document ID: d4d35b7c-b4e5-4cb4-8dd9-1b7edddf0ad6
Document Type: srp
Title: CHEMICAL AND VOLUME CONTROL SYSTEM (PWR) (INCLUDING BORON
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070537.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.3.4
CFR Part: 
CFR Title: 

Content:
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 EMCB coordinates with MEB EMEB to assure that essential portions 50 51 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 Regulatory 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. 9.3.4-11 DRAFT Rev. 3 - April 1996 3. The failure of portions of the system or of other systems not designed to seismic Category I standards and located close to essential portions of the system, or of nonseismic Category I structures that house, support, or are close to essential portions of the CVCS, will not preclude operation of the essential portions of the CVCS (Position C.2 of Regulatory Guide 1.29). Reference to SAR sections describing site features and the general arrangement and layout drawings will be necessary, as well as the SAR tabulation of seismic design classifications for structures and systems. Statements in the SAR that verify that the above conditions are met are acceptable (CP). 4. Using the results of evaluations performed by CPBSRXB , the CMEBEMCB 52 53 verifies the adequacy of the system for reactivity control in the following areas: a. Boration of