Thermal emissivity of nuclear graphite was measured with its oxidation degree. Commercial nuclear graphites (IG-110, PECA, IG-430, and NBG-18) have been used as samples. Concave on graphites surface increased as its oxidation degree increased, and R value (Id/Ig) of the graphites decreased as the oxidation degree increased. The thermal emissivity increased depending on the decrease of the R (Id/Ig) value through Raman spectroscopy analysis. It was determined that the thermal emissivity was influenced by the crystallinity of the nuclear graphite.

• Seung-Kuk Seo(School of Advanced Materials and System Engineering, Kumoh National Institute of Technology)
• Jae-Seung Roh(School of Advanced Materials and System Engineering, Kumoh National Institute of Technology)
• Eung-Seon Kim(Korea Atomic Energy Research Institute (KAERI))
• Se-Hwan Chi(Korea Atomic Energy Research Institute (KAERI))
• Suk-Hwan Kim(School of Advanced Materials and System Engineering, Kumoh National Institute of Technology)
• Sang-Woo Lee(School of Advanced Materials and System Engineering, Kumoh National Institute of Technology)