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:
. General Design Criteria 1, 2, and 4, as they relate to systems important to safety being designed, fabricated, erected, and tested to quality standards commensurate with the importance of the safety function to be performed; systems being designed to withstand the effects of natural phenomena (e.g., earthquakes) without loss of capability to perform their safety functions; and systems being designed to accommodate postulated environmental conditions and protected against dynamic effects (e.g., missiles, pipe whip, and jet impingement), respectively. 2. General Design Criterion 16 (GDC 16), as it relates to a system, in concert with the 32 reactor containment, being provided to establish an essentially leak-tight barrier against the uncontrolled release of radioactivity to the environment. 3. General Design Criterion 54 (GDC 54), as it relates to piping systems penetrating the 33 containment being provided with leak detection, isolation, and containment capabilities having redundant and reliable performance capabilities, and as it relates to design provision incorporated to permit periodic operability testing of the containment isolation system, and leak-rate testing of isolation valves. 4. General Design Criteria 55 and 56 as it they relates to lines that penetrate the primary 34 containment boundary and either are part of the reactor coolant pressure boundary or connect directly to the containment atmosphere being provided with isolation valves as follows: Locked-closed isolation valves are defined as sealed closed barriers (see paragraph II.f) 1 A simple check valve is not normally an acceptable automatic isolation valve for this 2 application. A simple check valve is not normally an acceptable automatic isolation valve for this 3 application. 6.2.4-5 DRAFT Rev. 3 - April 1996 a. One locked-closed isolation valve inside and one locked-closed isolation valve 1 outside containment; or b. One automatic isolation valve inside and one locked-closed isolation valve 2