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:
ather 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 - March 2007 A. The primary review organization for SRP Section 6.5.2 will determine the acceptability of the iodine removal effectiveness of the sprays. B. Since all plants do not use the containment sprays as a fission product removal system, the primary review organization reviews the system for cases in which the system is used only as a heat removal system. 6. The primary review organization analyzes the heat removal capability of the spray system. This capability is a function of the degree of thermal equilibrium attained by the spray water and the volume of the containment covered by the spray water. The spray drop size and residence time in the containment atmosphere determine the degree of thermal equilibrium attained by the spray water. The reviewer confirms the validity of the degree of thermal equilibrium attained using the following information: A. An elevation drawing of the containment showing the locations of the spray headers relative to the internal structures, including fall heights. B. The results of the spray nozzle test program to determine the spectrum of drop sizes and mean drop size emitted from the nozzles as a function of pressure drop across the nozzles. C. Reference 6 contains information regarding the heating of spray drops in air-steam atmospheres which can be used to determine the validity of the degree of thermal equilibrium of the spray water used in the analyses. 7. The primary review organization reviews the adequacy of provisions made to prevent overpressurization of fan cooler ducting following a LOCA. The reviewer will ensure: A. The primary review organization reviews the heat removal capability of the fan coolers. B. The test programs and calculation models used to determine the performance capability of fan coolers are reviewed