article·2009-12-30Open access

Thermal Emissivity of a Nuclear Graphite as a Function of Its Oxidation Degree (2) - Effect of Surface Structural Changes -

Seung-Kuk Seo, Jae‐Seung Roh, Eung-Seon Kim, Se-Hwan Chi, Suk-Hwan Kim, Sangwoo Lee

Abstract

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.
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Research context

OpenAlex topics: Graphite, nuclear technology, radiation studies · Nuclear and radioactivity studies · Radiation Shielding Materials Analysis

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