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热气导管的双端断裂事故是１０ＭＷ高温气冷堆（ＨＴＲ－１０）的假想极限事故，该事故喷放阶段结束后，在气体扩散和浮升力的作用下，堆舱中的空气通过破口进入堆芯，并在堆芯流道和堆舱组成的回路中慢慢形成自然对流，从而引起进气事故。为了分析堆芯石墨的腐蚀情况，本文首先对ＨＴＲ－１０堆芯结构作了简化处理，然后计算了堆体简化流道内气体自然对流的质量流量、固相和气相的温度、石墨的腐蚀率、石墨的腐蚀总量以及燃料元件经腐蚀后的裸露率。这些计算结果表明，即使在该极限事故下，ＨＴＲ－１０仍有很好的安全特性。
The double-end breakage of a hot gas duct is the hypothetical extreme accident of a 10 MW HTR-10, after which the air in the plenum enters through the breach due to gas diffusion and buoyancy forces after the discharge stage Core, and gradually form a natural convection in the loop formed by the core flow path and the stack space, thereby causing an air intake accident. In order to analyze the corrosion of the core graphite, the HTR-10 core structure is simplified firstly, and then the mass flow of gas natural convection, the temperature of solid phase and gas phase, the corrosion rate of graphite, The total amount of graphite corrosion and fuel element corrosion rate after exposure. These calculations show that the HTR-10 still has good safety features even at this extreme accident.