Water vapor oxidation behaviors of nuclear graphite IG-110 for a postulated accident scenario in high temperature gas-cooled reactors

Comparison of ultrafine-grain isotropic graphite prepared from microcrystalline graphite and pitch coke

“…Secondly, with the increase of coal-tar pitch binder dosage, there may be a lower crystallization of the final graphite products due to the higher crystallinity of filler particles than the binder after graphitization (Fig. S1a-b and Table S3) [35][36][37]. The graphitization degrees of MGG12 and MGG8 are comparable to that of commercial nuclear graphite such as 84.8% of IG-110 and 83.5% of NBG-18 [38], and much higher than 74% of NPIG [8].…”

Investigation On Oxidation Behavior of Nuclear Graphite IG-110 At Elevated Temperature

“…However, graphite has low oxidation stability at high temperature (>450°C), causing a loss of integrity of the core components. Loss of integrity occurs due to a decrease in strength and elastic modulus with the formation and expansion of pores caused by oxidation [10]. Graphite oxidation will result in a decrease in the weight of the material and changes in the microstructure [11].…”

“…The method of manufacture and purity of graphite is very influential because it will affect the mechanical properties of graphite [9]. Thus, the different shapes and dimensions of the sample can result in different oxidation kinetics [10]. The oxidation behavior of graphite is caused by high temperature so that pores open or formed and the strength gradually decreases with loss of sample mass [13].…”