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:
quirements," subparagraph (2)(xiv), regarding TMI Action Plan Item II.E.4.2, "Containment Isolation Dependability."124 19. 10 CFR 50.34(f), "Additional TMI-Related Requirements," subparagraph (2)(xv), regarding TMI Action Plan Item II.E.4.4, "Purging."125 20. Regulatory Guide 1.155, "Station Blackout."126 21. 10 CFR 50.63, "Loss of All Alternating Current Power," subparagraph (a)(2), regarding containment integrity in the event of a station blackout.127 22. NRC Generic Letter 83-02, "NUREG-0737 Technical Specifications," January 10, 1983.128 23. Item II.E.4.2, "Containment Isolation Dependability," in NUREG-0737 and NUREG- 0718.129 24. NRC Letter to all Holders of Operating Licenses and Construction Permits for Pressurized Water Reactors (PWRs), “Loss of Decay Heat Removal (Generic Letter 88- 17),” October 17, 1988.130 25 NUREG-1449, "Shutdown and Low-Power Operation at Commercial Nuclear Power Plants in the United States," Final Report, Office of Nuclear Reactor Regulation, U.S. Nuclear Regulatory Commission, September 1993.131 6.2.4-21 DRAFT Rev. 3 - April 1996 Branch Technical Position CSB 6-4 (Currently the responsibility of the Containment Systems and Severe Accident Branch, SCSB) CONTAINMENT PURGING DURING NORMAL PLANT OPERATIONS A. BACKGROUND This branch technical position pertains to system lines which can provide an open path from the containment to the environs during normal plant operation, e.g., the lines associated with the containment purge and vent systems. It supplements the position taken in SRP Section 6.2.4. While the containment purge and vent systems provide plant operational flexibility, their designs must consider the importance of minimizing the release of containment atmosphere to the environs following a postulated loss-of-coolant accident. Therefore, plant designs must not rely on their use on a routine basis. The need for purging has not always been anticipated in the design of plants, and therefore design criteria for the containment