Oxidation of Graphite Material Used in Reactor

In high-temperature gas-cooled reactor (HTGR), graphite is used as structural materials and moderator. During reactor operating, graphite oxidation has an effect on the safety and operation of reactor due to the impurities in coolant or water ingress and air ingress accidents which may take place. In the paper, the researches on the graphite oxidation in reactor were reviewed from four aspects, such as the mechanism of graphite oxidation, the influence of oxidation on graphite properties, the safety assessment in accident and the improvement the oxidation resistance of graphite. Some problems to be solved in future concerned in the graphite oxidition were put forward.