Korean Journal of Metals and Materials (대한금속재료학회지)

The Korean Institute of Metals and Materials (대한금속재료학회)
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Effects of Surface Roughness on the Thermal Emissivity of IG-11 Graphite for Nuclear Reactor

IG-11 원자로용 흑연의 열방사 특성에 미치는 표면 거칠기의 영향

  • Roh, Jae-Seung (School of Advanced Materials and Systems Engineering, Kumoh National Institute of Technology) ;
  • Seo, Seung-Kuk (School of Advanced Materials and Systems Engineering, Kumoh National Institute of Technology) ;
  • Kim, Suk Hwan (School of Advanced Materials and Systems Engineering, Kumoh National Institute of Technology) ;
  • Chi, Se-Hwan (Korea Atomic Energy Research Institute (KAERI)) ;
  • Kim, Eung-Seon (Korea Atomic Energy Research Institute (KAERI)) ;
  • Kim, Hye Sung (Dept. of Nano Fusion Technology, Pusan National University)
  • 노재승 (금오공과대학교 신소재시스템공학부) ;
  • 서승국 (금오공과대학교 신소재시스템공학부) ;
  • 김석환 (금오공과대학교 신소재시스템공학부) ;
  • 지세환 (한국원자력연구소) ;
  • 김응선 (한국원자력연구소) ;
  • 김혜성 (부산대학교 나노융합기술과)
  • Received : 2011.03.09
  • Published : 2011.07.25
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Abstract

This paper reports the relationship between the surface roughness and thermal emissivity of graphite (IG-11) in nuclear reactors. The roughness was controlled by changing the oxidization time, resulting in 0, 6, and 11% losses of mass. The levels of roughness were 0.40, 0.72 and 1.09${\mu}m$ for the weight loss of 0, 6 and 11%, respectively. The binders and graphite fillers were found to have sequentially oxidized with a higher thermal emission for the highly oxidized sample, but with a lower emission when measured at a higher temperature. Our study suggests a method for predicting the thermal emission rate of graphite in a nuclear reactor based on roughness measurement.

Keywords

References

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