Document: NUREG-0800
Document ID: a78c6fc8-c253-4d08-bf41-f8120025f067
Document Type: srp
Title: CONTAINMENT HEAT REMOVAL SYSTEMS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0701/ML070160661.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6.2.2
CFR Part: 
CFR Title: 

Content:
reviewing the system to ensure the following: A. All potential single failures have been identified in accordance with GDC 38, and no single failure could incapacitate the entire system. B. Engineered safety feature design standards have been applied. C. The system design provisions for periodic inservice inspection and operability testing ensure that the system and components are accessible for inspection and all active components can be tested. D. The capability exists to monitor system performance and control active components from the control room so that the operator can exercise control over system functions or isolate a malfunctioning system component. 3. The primary review organization analyzes the containment spray system and ECCS pump NPSH margin and ensures that the analyses for the recirculation phase are done in accordance with the guidelines of Regulatory Guide 1.82, Revision 3. 4. The primary review organization also reviews the evaluation of the volume of the containment covered by the sprays and the extent of overlap with respect to heat removal capabilities. A judgment will be made regarding the acceptability of the spray coverage and extent of overlap; the volume of the containment covered by the sprays should be maximized and the extent of overlap kept to a minimum. Elevation and plan drawings of the containment depicting the spray patterns are used to determine coverage and overlap. 5. In general, the design requirements for the spray systems with respect to spray drop size spectrum and mean drop size, spray drop residence time in the containment atmosphere, containment coverage by the sprays, and extent of overlap of the sprays are more stringent when the acceptability of the system is being considered from an iodine removal capability standpoint rather than from a heat removal capability standpoint. Consequently, when the iodine removal capability of the system is satisfied, the heat removal capability is found acceptable. 6.2.2-8 Revision 5 -