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:
ss of the sprays (See Standard Review Plan Section 6.5.2). b. Since all plants do not use the containment sprays as a fission product removal system, the CSBSCSB reviews the system for cases where the system is used 74 only as a heat removal system. 9. CSBThe SCSB reviews analyses of the heat removal capability of the spray system. 75 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 CSBSCSB confirms the validity of the 76 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, and; 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.; and c. Reference 6, "Design Considerations of Reactor Containment Spray Systems - Part VI, The Heating of Spray Drops In Air-Steam Atmospheres," contains 77 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. 10. CSBThe SCSB reviews the adequacy of provisions made to prevent over-pressurization 78 of fan cooler ducting following a loss-of-coolant accident (Standard Review Plan Section 6.2.5). a. CSBThe SCSB reviews the heat removal capability of the fan coolers. 79 b. The test programs and calculation models used to determine the performance capability of fan coolers are reviewed for acceptability. c. If the secondary side of a fan cooler heat exchanger is not a closed system, the CSBSCSB reviews the potential for surface fouling. The CSBSCSB 80 81