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:
to limit the cladding metal-water reaction to negligible amounts. Meeting the requirements of GDC 35 for the applicable portions of the CVCS enhances plant safety by ensuring that sufficient emergency core cooling is provided during design basis accidents, thereby preventing damage to the fuel and cladding that could interfere with core cooling. 8. GDC 60 requires that the release of radioactive material to the environment be controlled. The CVCS during normal reactor operation can contain radioactive material in gaseous and liquid forms. The CVCS is designed with storage tanks to handle venting and draining from various CVCS systems. The CVCS vent and drain systems are designed to appropriately confine the radioactivity associated with the effluents. Meeting the requirements of GDC 60 enhances plant safety by preventing the uncontrolled release of radioactive material to the environment. 9. GDC 61 requires that systems that may contain radioactivity be designed to assure adequate safety under normal and postulated accident conditions. The CVCS system is connected to the RCS and during normal and postulated accident conditions may contain radioactivity throughout the system. Meeting the requirements of GDC 61 ensures that applicable portions of the CVCS are designed to provide confinement of radioactive material and to reduce the potential exposure to radioactive materials to the lowest practical levels. 10. 10 CFR 50.63 establishes requirements on the plant regarding the capability to ensure that the core is cooled in the event of a station blackout for a specific duration. The CVCS system is capable of providing core cooling to the reactor core through coolant charging and letdown functions. In addition, the CVCS provides coolant makeup and RCP seal injection. Regulatory Guide 1.155 identifies guidance and acceptable methods for complying with the requirements of 10 CFR 50.63. Compliance with this Regulatory Guide and 10 CFR 50.63 provides assurance that the CVCS