高温气冷堆用石墨材料的腐蚀实验与软件模拟

在高温气冷堆进水进空气事故下，空气和水蒸气会与堆内的石墨材料发生化学腐蚀反应，从而可能影响反应堆的安全。为研究高温气冷堆内石墨材料的氧化腐蚀特性，本文利用气相色谱法实验测量了IG-110石墨在不同温度和不同气体组分配比情况下的腐蚀速率及腐蚀产物，并利用THERMIX/REACT软件对整个石墨腐蚀过程进行了模拟。研究结果表明：反应温度对石墨腐蚀的影响最为显著，腐蚀速率随着温度的升高而增大，同时随着温度升高，CO与CO₂的含量比也逐渐增大。通过与实验结果对比分析，验证了THERMIX/REACT软件用于高温气冷堆安全分析的可靠性。

Experiment and Simulation of Graphite Oxidation for HTR

In air or water ingress accident of the high temperature gas-cooled reactor (HTR), the corrosion of graphite components is inevitable result from oxygen and water steam ingression, that may affect the reactor safety. Oxidation progress and the gas products of IG-110 nuclear graphite were studied using gas chromatograph. The numerical simulations were carried out by THERMIX/REACT software. The results show that temperature has a marked impact on IG-110 graphite oxidation. As well as the content proportion of CO to CO₂, oxidation amount increases with temperature. The application of THERMIX/REACT for HTR safety analysis is validated by comparisons of the results of experimental and numerical simulation.