Document: NUREG-0800
Document ID: 632e6c59-03bd-4648-b0b3-e8b2efd6fa04
Document Type: srp
Title: CONTAINMENT ISOLATION SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0703/ML070380197.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6.2.4
CFR Part: 
CFR Title: 

Content:
ance with GDC 4 requirements provide reasonable assurance that the containment isolation system has the capability to perform its safety function of containment isolation and to prevent the release of radioactive materials to the environment. These requirements also ensure that containment purge and vent valves are designed for reliable isolation under accident conditions. 4. GDC 16, "Containment Design," requires that the reactor containment and its systems establish an essentially leak-tight barrier against the uncontrolled release of radioactive materials to the environment. GDC 16 applies to this SRP section because the reviewer evaluates the containment isolation system for whether it allows the normal or emergency passage of fluids through the containment boundary while preserving the capability of the boundary to prevent or limit the escape of fission products from postulated accidents. This SRP section provides guidance as to design requirements for containment isolation 6.2.4-11 Revision 3 - March 2007 provisions, including the number and location of isolation valves, their actuation and control features, redundancy, valve actuation signals, and closure times. Compliance with GDC 16 requirements provides reasonable assurance that the containment and its systems will act as an essentially leak-tight barrier to prevent the uncontrolled release of radioactive materials to the environment in an accident. 5. GDC 54, "Piping Systems Penetrating Containment," requires that piping systems that penetrate the primary reactor containment have leak-detection, isolation, containment, redundancy, reliability, and performance capabilities that reflect the safety importance of isolating these piping systems. GDC 54 applies to this SRP section because the reviewer evaluates the containment isolation system for whether valves in piping systems that penetrate the containment are designed to close reliably under accident conditions and prevent the uncontrolled release of