Document: NUREG-0800
Document ID: c23d52ec-d83f-4468-b35e-e8c97fdf2f09
Document Type: srp
Title: CONTAINMENT ISOLATION SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070461.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6.2.4
CFR Part: 
CFR Title: 

Content:
nts important to safety (a) be designed to accommodate the effects of, and be compatible with, environmental conditions associated with normal operation, maintenance, testing, and postulated accidents (including LOCAs) and (b) be appropriately protected against dynamic effects (including those of missiles, pipe whipping, and discharging fluids) that may result from equipment failures and from events and conditions outside the nuclear power unit. GDC 4 applies to this SRP section because the reviewer evaluates the containment isolation system to ensure its capability to perform its isolation function at all times. This application includes the capability to perform its function in any environmental condition to which the system's components may be exposed, including dynamic effects. BTP CSB 6-4 provides guidance related to dynamic effects that should be considered in the design of containment purge and vent valves. Meeting the requirements of GDC 4 provides assurance that the containment isolation system will have the capability to perform its safety function of containment isolation, thereby preventing the release of radioactive materials to the environment. Meeting these requirements will also ensure that containment purge and vent valves are designed to provide reliable isolation under accident conditions.66 DRAFT Rev. 3 - April 1996 6.2.4-12 4. Compliance with GDC 16, "Containment Design," requires that the reactor containment and its associated systems establish an essentially leaktight 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 to determine whether it allows the normal or emergency passage of fluids through the containment boundary while it preserves the capability of the boundary to prevent or limit the escape of fission products that may result from postulated accidents. This SRP section provides guidance related to