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:
ry containment leakage that may directly bypass the secondary containment and other contiguous areas served by ventilation and filtration systems should be described. The individual tests should be in accordance with the procedures specified in the technical specifications, or associated bases.33 b. Provisions should be made in the design of the secondary containment system to permit inspections and monitoring of the functional capability. The determination of the depressurization time, the secondary containment in leakage rate, the uniformity of negative pressure throughout the secondary containment and other contiguous areas, and the potential for exfiltration should be included in the preoperational and periodic test programs. 6.2.3-7 DRAFT Rev. 3 - April 1996 Technical Rationale34 The technical rationale for application of the above acceptance criteria to the secondary containment functional design is discussed in the following paragraphs: 1. GDC 4 requires that structures, systems and components important to safety be designed to accommodate the effects of environmental conditions associated with normal operation, maintenance, testing, and postulated accidents (including LOCAs), and that they be protected against dynamic effects that may result from equipment failures. The function of the secondary containment is to minimize offsite radioactive releases by confining a substantial fraction of leakage from primary containment following a LOCA. Application of GDC 4 to the secondary containment provides assurance that the environmental conditions and equipment failures to which it may be exposed will not affect its capability to contain radioactive material under all operating conditions, including accidents. 2. GDC 16 requires that reactor containment and associated systems be provided to establish an essentially leak-tight barrier against the uncontrolled release of radioactivity to the environment. The secondary containment minimizes radioactive releases by