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:
ming a barrier that is essentially leaktight and that will prevent the release of fission products in the event of an accident. Regulatory Guide 1.26 specifies quality standards that are applicable to components in the containment isolation system. This SRP section also 6.2.4-11 DRAFT Rev. 3 - April 1996 contains TMI-related requirements regarding containment isolation dependability, containment purging/venting during plant operation, and purge/vent valves. Meeting the requirements of GDC 1 provides assurance that the containment isolation system will perform its safety function, thereby preventing the release of radioactive materials to the environment.64 2. Compliance with General Design Criterion 2 (GDC 2), "Design Bases for Protection against Natural Phenomena," requires that structures, systems, and components important to safety be designed to withstand the effects of natural phenomena such as earthquake, tornado, hurricane, flooding, tsunami, and seiche without loss of capability to perform their safety functions. GDC 2 applies to this SRP section because the reviewer evaluates the containment isolation system to ensure its capability to isolate the containment under accident conditions (e.g., LOCA) combined with applicable severe natural phenomena. Regulatory Guide 1.29 provides guidance acceptable to the staff for developing designs with the capability to withstand earthquakes. Meeting the requirements of GDC 2 provides assurance that the containment will act as a barrier that is essentially leaktight, thereby preventing the release of radioactive materials to the environment under all credible conditions.65 3. Compliance with General Design Criterion 4 (GDC 4), "Environmental and Dynamic Effects Design Bases," requires that structures, systems, and components 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