Document: NUREG-0800
Document ID: 00049a4f-6345-4415-8ec0-0e63d8d04990
Document Type: srp
Title: NUREG-0800
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070482.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6
CFR Part: 
CFR Title: 

Content:
e proprietary report WCAP-807726 (Reference. 2219) , without the augmented critical flow correlation. The TMD 27 calculation should incorporate the heat transfer correlation developed from the 1974 28 full-scale ice condenser tests and should include the compressibility factor "Y" in the incompressible flow equation. For plants being reviewed for construction permits, the design differential pressures for all ice condenser control volumes or subcompartments, and system components (e.g., reactor vessel, pressurizer, steam generators) and supports, should provide at least a 40% margin above the highest calculated differential pressures. For plants being reviewed for operating licenses, the highest calculated differential pressures for all ice condenser control volumes or subcompartments should not exceed the corresponding design differential pressures. The operating deck, steam generator and pressurizer enclosures, and ice condenser lower inlet doors should be designed to withstand the maximum calculated reverse differential pressures between the upper and lower compartments using the LOTIC-2 computer code (Reference. 2623). To account for uncertainties in the analysis of reverse differential 29 pressures, an adequate margin should be provided above the maximum calculated reverse differential pressure. 3c. In meeting the requirements of General Design Criteria 16 and 38 regarding the functional capability of the containment heat removal system to reduce rapidly, and without exceeding containment design conditions, the containment pressure and temperature under postulated accident conditions, the maximum allowable area for steam bypass of the ice condenser should be greater than the identifiable bypass area for the plant (e.g., the drainage provisions to allow containment spray water to return from the upper compartment to the sumps in the lower compartment). The bypass area capability of the plant should be based on analyses of the spectrum of postulated reactor