Document: NUREG-0800
Document ID: eb117be6-f688-40f6-97a8-c91b8e9f8e74
Document Type: srp
Title: CONTAINMENT HEAT REMOVAL SYSTEMS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070457.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6.2.2
CFR Part: 
CFR Title: 

Content:
ure. d. Leak detection, isolation and containment capabilities being incorporated in the design of the containment heat removal system.24 2B. General Design Criterion 39 (GDC 39), as it relates to the containment heat removal 25 26 system being designed to permit periodic inspection of components. 3C. General Design Criterion 40 (GDC 40), as it relates to the containment heat removal 27 28 system being designed to permit periodic testing to assureensure system integrity, and 29 the operability of the system, and active components. Specific acceptance criteria necessary to meet the relevant requirement of GDC General Design Criteria 38, 39, and 40 are as follows: 30 DRAFT Rev. 5 - April 1996 6.2.2-4 1. The containment heat removal systems should meet the redundancy and power source requirements for an engineered safety feature; i.e., the systems should be designed to accommodate a single active failure. The results of failure modes and effects analyses of each system should assureensure that the system is capable of withstanding a single 31 failure without loss of function. This is conformance with the requirements of General Design Criterion GDC 38. 32 2. With regard to General Design Criterion GDC 38 as it relates to the capability of the33 containment system to accomplish its safety function, the spray system should be designed to accomplish this without pump cavitation occurring. Therefore, the net positive suction head available to the pumps in both the injection and recirculation phases of operation should be greater than the required NPSH. A supporting analysis should be presented in sufficient detail to permit the staff to determine the adequacy of the analysis and should show that the available NPSH is greater than the required NPSH. Regulatory Guide 1.82, Rev. 1 (Ref. 5) describes methods acceptable to the staff for evaluating the 34 NPSH margin. In the recirculation phase; i.e., in the long term (after about 1 hour) following a LOCA, the containment spray