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:
quipment, e.g., fans, filters, and ductwork, located beyond the purge system isolation valves against loss of function from the environment created by the escaping air and steam. c. An analysis of the reduction in the containment pressure resulting from the partial loss of containment atmosphere during the accident for ECCS backpressure determination. d. The maximum allowable leak rate of the purge isolation valves should be specified on a case-by-case basis giving appropriate consideration to valve size, maximum allowable leakage rate for the containment (as defined in Appendix J to 10 CFR Part 50), and where appropriate, the maximum allowable bypass leakage fraction for dual containments. SRP Draft Section 6.2.4 Attachment A - Proposed Changes in Order of Occurrence 6.2.4-25 DRAFT Rev. 3 - April 1996 Item numbers in the following table correspond to superscript numbers in the redline/strikeout copy of the draft SRP section. Item Source Description 1. Current primary review branch and Changed PRB to Severe Accident Branch (SCSB). designation 2. Editorial Defined "SRP" as "Standard Review Plan." 3. Current primary review branch Changed PRB to SCSB. designation 4. Integrated Impact No. 376 Added a sentence from 10 CFR 50.34(f)(2)(xv) to indicate that AREAS OF REVIEW includes a review of design features to minimize purging time. 5. Integrated Impact No. 376 Added a sentence from 10 CFR 50.34(f)(2)(xv) to indicate that AREAS OF REVIEW includes a review of the reliability of the purge system to isolate under accident conditions. 6. Integrated Impact No. 377 Added a sentence to AREAS OF REVIEW to indicate that the review includes containment isolation provisions for station blackout. 7. SRP-UDP format item Added "Review Interfaces" to AREAS OF REVIEW. 8. Current primary review branch Changed PRB to SCSB. designation 9. SRP-UDP format item Divided the existing paragraph into subsections under "Review Interfaces." The existing text and order were preserved, except where