Oxidation rate of graphitic matrix material in the kinetic regime for VHTR air ingress accident scenarios
作者： Jo Jo Lee , Tushar K. Ghosh , Sudarshan K. Loyalka
DOI: 10.1016/J.JNUCMAT.2014.03.033
关键词:
摘要: Abstract Data on oxidation rates of matrix-grade graphite in the kinetically-controlled temperature regime are needed for safety analysis High Temperature Gas Cooled Reactors and Very Reactors. In this work, rate graphitic matrix material GKrS was measured thermogravimetrically various oxygen concentrations with temperatures from 873 to 1873 K. A semi-empirical Arrhenius equation also developed range. The activation energy is found be about 111.5 kJ/mol. order reaction 0.89. surface oxidized characterized by Scanning Electron Microscopy, Dispersive Spectroscopy, Fourier Transform Infrared Spectroscopy X-ray Photoelectron Spectroscopy.
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