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:
REVIEW RESPONSIBILITIES Primary - Containment Systems and Severe Accident Branch (SCSB)1 Secondary - None I. AREAS OF REVIEW The SCSB reviews the information in the applicant's safety analysis report (SAR) concerning 2 the functional capability of the secondary containment system. The secondary containment system includes the outer containment structure of dual containment plants and the associated systems provided to mitigate the radiological consequences of postulated accidents. The secondary containment structure and supporting systems are provided to collect and process radioactive material that may leak from the primary containment following an accident. The supporting systems maintain a negative pressure within the secondary containment and process this leakage. Plant areas and systems contiguous to the secondary containment which also collect and process radioactive material that may leak from the primary containment following an accident are reviewed by the SCSB in the same manner as the secondary containment. 3 The SCSB review of the functional capability of the secondary containment system of dual 4 containment designs includes the following points: 1. Analyses of the pressure and temperature response of the secondary containment to a loss-of-coolant accident within the primary containment. DRAFT Rev. 3 - April 1996 6.2.3-2 2. Analyses of the effect of openings in the secondary containment on the capability of the depressurization and filtration system to accomplish its design objective of establishing a negative pressure in a prescribed time. 3. Analyses of the pressure and temperature response of the annular region between the primary and secondary containment to a high energy line rupture within the secondary containment. 4. The functional design criteria applied to guard pipes surrounding high energy lines within the secondary containment. 5. Analyses of any primary containment leakage paths that bypass the secondary containment. 6. The design