Document: NUREG-0800
Document ID: 07e6bf87-51bb-4023-80a2-2a67ca4a9f80
Document Type: srp
Title: Revision 3 - March 2007
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0707/ML070740319.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6
CFR Part: 
CFR Title: 

Content:
lear Regulatory Commission, Washington, DC 20555, Attention: Reproduction and Distribution Services Section, or by fax to (301) 415-2289; or by email to DISTRIBUTION@nrc.gov. Electronic copies of this section are available through the NRC's public Web site at http://www.nrc.gov/reading-rm/doc-collections/nuregs/staff/sr0800/, or in the NRC's Agencywide Documents Access and Management System (ADAMS), at http://www.nrc.gov/reading-rm/adams.html, under Accession # ML070740319. NUREG-0800 U.S. NUCLEAR REGULATORY COMMISSION STANDARD REVIEW PLAN BRANCH TECHNICAL POSITION 6-4 CONTAINMENT PURGING DURING NORMAL PLANT OPERATIONS REVIEW RESPONSIBILITIES Primary - Organization responsible for the review of component integrity issues related to engineered safety features Secondary - None A. BACKGROUND This branch technical position pertains to system lines which can provide open paths from the containment to the environs during normal plant operation (e.g., lines of the containment purge and vent systems). It supplements the position taken in Standard Review Plan (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 (LOCA). Therefore, plant designs must not rely on their routine use. BTP 6-4-2 Revision 3 - March 2007 The need for purging during reactor operation is not always anticipated in the design of plants, and therefore design criteria for the containment purge system are not fully developed. The purging experience varies considerably from plant to plant. Some plants do not purge during reactor operation, some purge intermittently for short periods, and some purge continuously. There is similar disparity in the need for, and use of, containment vent systems at operating plants. Containment purge systems have been used in a variety of ways (e.g., to alleviate certain