Document: NUREG-0800
Document ID: 90078267-41fd-4e45-bc4c-a21ef5ed6dfb
Document Type: srp
Title: Revision 3 - March 2007
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0707/ML070740442.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6
CFR Part: 
CFR Title: 

Content:
ner to concrete interface. (iv) Variations from these guidelines may be acceptable if the overall ECCS performance evaluation model produces an acceptable peak calculated fuel cladding temperature. C. REFERENCES 1. 10 CFR Part 50.46, "Acceptance Criteria for Emergency Core Cooling Systems for Light Water Nuclear Power Reactors," and 10 CFR Part 50, Appendix K, "ECCS Evaluation Models." 2. T. Tagami, "Interim Report on Safety Assessment and Facilities Establishment Project in Japan for Period Ending June 1965 (No. 1)," prepared for the National Reactor Testing Station, February 28, 1966 (unpublished work). 3. H. Uchida, A. Oyama, and Y. Toga, "Evaluation of Post-Incident Cooling Systems of Light-Water Power Reactors," Proc. Third International Conference on the Peaceful Uses of Atomic Energy, Volume 13, Session 3.9, United Nations, Geneva (1964). TABLE 1 IDENTIFICATION OF CONTAINMENT HEAT SINKS 1. Containment Building (e.g., liner plate and external concrete walls, floor, sump, and linear anchors). 2. Containment Internal Structures (e.g., internal separation walls and floors, refueling pool and fuel transfer pit walls, and shielding walls). 3. Supports (e.g., reactor vessel, steam generator, pumps, tanks, major components, pipe supports, and storage racks). 4. Uninsulated Systems and Components (e.g., cold water systems, heating, ventilation and air conditioning systems, pumps, motors, fan coolers, recombiners, and tanks). 5. Miscellaneous Equipment (e.g., ladders, gratings, electrical cables, trays, and cranes). BTP 6-2-5 Revision 3 - March 2007 TABLE 2 HEAT SINK THERMOPHYSICAL PROPERTIES Material Density kg/m3 (lb/ft3) Specific Heat kJ/kg-EK(Btu/lb- EF) Thermal Conductivity W/m-EK(Btu/hr-ft- EF) Concrete 2330 (145) 0.654 (0.156) 1.6 (0.92) Steel 7850 (490) 0.503 (0.12) 47 (27.0) TABLE 3 UCHIDA HEAT TRANSFER COEFFICIENTS Mass Ratio kg (lb) air kg (lb) steam Heat Transfer Coefficient W/m2-EK (Btu/hr-ft2- EF) Mass Ratio kg(lb) air kg(lb) steam) Heat Transfer