Document: NUREG-0800
Document ID: 90078267-41fd-4e45-bc4c-a21ef5ed6dfb
Document Type: srp
Title: Revision 3 - March 2007
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0707/ML070740442.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 # ML070740442. NUREG-0800 U.S. NUCLEAR REGULATORY COMMISSION STANDARD REVIEW PLAN BRANCH TECHNICAL POSITION 6-2 MINIMUM CONTAINMENT PRESSURE MODEL FOR PWR ECCS PERFORMANCE EVALUATION REVIEW RESPONSIBILITIES Primary - Organization responsible for the review of component integrity issues related to engineered safety features Secondary - None A. BACKGROUND 10 CFR Part 50, Appendix K, Paragraph I.D.2, requires that the containment pressure used to evaluate the performance capability of a pressurized-water reactor emergency core cooling system ECCS not exceed a pressure calculated conservatively for that purpose. It further requires the calculation to include the effects of operation of all installed pressure-reducing systems and processes. Therefore, the following branch technical position has been developed as guidance in a minimum containment pressure analysis. The approach described applies only to the ECCS-related containment pressure evaluation pursuant to 10 CFR 50.46(a)(1)(ii) and not to the containment functional capability evaluation for postulated design-basis accidents. BTP 6-2-2 Revision 3 - March 2007 B. BRANCH TECHNICAL POSITION 1. Input Information for Model A. Initial Containment Internal Conditions. The minimum containment gas temperature, minimum containment pressure, and maximum humidity encountered under limiting normal operating conditions should be used. Ice condenser plants should use the maximum containment gas temperature. B. Initial Outside Containment Ambient Conditions. A reasonably low