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:
onitoring: a. temperature upstream of the demineralizer to assure that resin temperature limits are not exceeded, and b. filter demineralizer differential pressure to assure that pressure differential limits are not exceeded. 9.3.4-7 DRAFT Rev. 3 - April 1996 2. The CVCS should have provision for automatically diverting or isolating the CVCS flow to the demineralizer in the event the demineralizer influent temperature exceeds the resin temperature limit. 3. A program is implemented to leakage from the makeup and letdown lines in accordance with Item III.D.1.1 of NUREG-0737 for OL applications and III.D.1.1 of NUREG-0718 for CP applications. 47 Technical Rationale: 48 The application of the above acceptance criteria to the chemical and volume control systems is addressed in the following paragraphs. 1. GDC 1 requires that structures, systems, and components (SSCs) important to safety be designed, fabricated, erected and tested to quality standards commensurate with the importance of the safety functions to be performed. The CVCS may be important to safety in that: 1) the CVCS may be capable of emergency boration during a safety injection to a reactor coolant system (RCS) boron concentration that exceeds the requirements for safe shutdown; 2) the CVCS may provide a means of makeup for the RCS coolant inventory in the event of small leaks; 3) portions of the CVCS may provide seal water to the reactor coolant pump (RCP) components important to safety; 4) the CVCS may be capable of borating the RCS to a safe cold shutdown condition; 5) the CVCS is relied upon to control RCS water chemistry to maintain the integrity of the RCS pressure boundary; 6) through connections to the RCS a CVCS failure could adversely affect the integrity of the RCS or containment systems; and 7) portions of the CVCS contain or may contain radioactive material. Meeting the requirements of GDC 1 and Regulatory Guide 1.26 ensures that the CVCS will be designed, fabricated, erected and tested to