Document: NUREG-0800
Document ID: 42f941d3-4815-4bc5-bf81-f2dab04a7aa7
Document Type: srp
Title: SECONDARY CONTAINMENT FUNCTIONAL DESIGN
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070459.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6.2.3
CFR Part: 
CFR Title: 

Content:
ial fraction of primary containment leakage following a LOCA. The technical specifications establish conservative limits on the total fraction of primary containment leakage which may bypass secondary containment. The technical specifications also specify periodic testing for the purpose of identifying bypass leakage paths, determining associated leakage rates, and verifying the operability of secondary containment depressurization and filtration systems. Application of Appendix J to the secondary containment system assures that capabilities to perform the confinement function are periodically verified and DRAFT Rev. 3 - April 1996 6.2.3-8 deficiencies identified and corrected to minimize the likelihood of excessive bypass leakage rates; this results in a high likelihood that a substantial portion of primary containment leakage will be confined. III. REVIEW PROCEDURES The procedures described below provide guidance on the review of the secondary containment system. The reviewer selects and emphasizes material from the review procedures as may be appropriate for a particular case. Portions of the review may be done on a generic basis for aspects of secondary containment functional design common to a class of plants, or by adopting the results of previous reviews of similar plants. Upon request from the SCSB primary reviewer, other branches will provide input for the areas 35 of review stated in subsection I of this SRP section. The SCSB reviewer obtains and uses such 36 input as required to assure that this review procedure is complete. SCSB reviews the analytical models used and the assumptions made in the analyses of the 37 pressure and temperature response of the secondary containment to loss-of-coolant accidents in the primary containment. In general, SCSB determines that the analyses conservatively predict 38 the secondary containment pressure response. In so doing, SCSB compares the analyses to the 39 guidelines in subsection II of this SRP section. For new