Analysis of Heat Transfer Characteristics Based on Design Factors for Determining the Internal Geometry of Metal Insulation in Nuclear Power Plant

원전용 금속단열재의 내부 형상결정을 위한 설계인자 별 열전달 특성 분석

  • 송기오 (케이엘이에스 주식회사) ;
  • 유정호 (케이엘이에스 주식회사) ;
  • 이태호 (케이엘이에스 주식회사) ;
  • 전현익 (케이엘이에스 주식회사) ;
  • 하승우 (케이엘이에스 주식회사) ;
  • 조선영 (케이엘이에스 주식회사)
  • Received : 2015.03.23
  • Accepted : 2015.09.04
  • Published : 2015.11.01


A heat insulating material used in the industrial site normally derives its heat insulating performance by using a low thermal conductivity material such as glass fiber. In case of the metal insulation for nuclear power plant, in contrast, only TP 304 stainless steel foil having high thermal conductivity is the only acceptable material. So, it is required to approach in structural aspect to ensure the insulation performance. In this study, the design factors related to the metal insulation internal structure were determined considering the three modes of heat transfer, i.e., conduction, convection, and radiation. The analysis of heat flow was used to understand the ratio of the heat transfer from each factor to the overall heat transfer from all the factors. Based on this study, in order to minimize the convection phenomenon caused by the internal insulation, a multiple foil was inserted in the insulation. The increase in the conduction heat transfer rate was compared, and the insulation performance under the three modes of heat transfer was analyzed in order to determine the internal geometry.


Metal Insulation;Heat Transfer Rate;Conduction;Radiation;Convective Heat Transfer;Concept Design


Supported by : 한국에너지기술평가원(KETEP)


  1. USNRC, 2003, "Water Sources for Long-Term Recirculation Cooling Following a Loss-of-Collant Accident," Regulatory Guide 1.82, Rev. 3.
  2. USNRC, 2005, "GSI-191: Experimental Studies of Loss of Coolant Accident Generated Debris Accumulation and Head Loss with Emphasis on the Effects of Calcium Silicate Insulation," NUREG/CR-6874.
  3. Kang, H. and Baek, Y. K., 2009, "An Analysis of Thermal Conductivity of Ceramic Fibrous Insulator by Modeling & Simulation Method I," Journal of the Korea Institute of Military Science and Technology, Vol. 5, No. 1, pp. 83-95.
  4. ANSYS, Inc., 2011, "ANSYS FLUENT User's Guide," Ver. 14.0.
  5. McAdams, W. H., 1954, Heat Transmission, 3rd ed., McGraw-Hill, New York, NY, pp. 165-171.
  6. Incropera, F. P. and DeWitt, D. P., 1985, Fundamentals of Heat and Mass Transfer, John Wiley and Sons, New York, NY, pp. 795-797.
  7. Mahesh, M. R. and Raul, R. K., 2011, Engineering Heat Transfer, Jones & Bartlett Learning, Burlington, pp. 883-884.
  8. Greg, F. N., 2002, Heat Transfer in Single and Multiphase Systems, CRC PRESS, London, pp. 186-190.