高温气冷堆抗氧化燃料元件氧化行为分析  

THE OXIDATION BEHAVIOR OF OXIDATION RESISTANT FUEL ELEMENTS OF HTGR

作　　者：朱庆山[1] 邱学良[1] 马昌文[1] 

机构地区：[1]清华大学核能技术设计研究院,北京102201

出　　处：《核科学与工程》1999年第4期320-325,共6页Nuclear Science and Engineering

摘　　要：通过复杂化学平衡计算，对高温气冷堆抗氧化燃料元件在正常运行和极端事故工况下的氧化行为进行了理论分析。结果表明高温气冷堆在出现大量空气或者水进入堆芯的极端事故工况下，抗氧化燃料元件能够起抗氧化保护作用，保持燃料元件的完整性。然而在正常运行工况下，抗氧化燃料元件可能会发生活化氧化，抗氧化涂层的完整性可能会被破坏。通过计算提出适当提高He中CO浓度来防止抗氧化燃料元件被活化氧化。The oxidation behavior of HTGR oxidation resistant fuel elements has beens tudied under extremely accidental conditions and normal operating conditions through complex chemical equilibrium simulation. The calculated results show that the oxidation resistant fuel elements could effectively prevent fuel elements from oxidization under extremely accidental conditions, and the integrity of fue lelements could be maintained. However, under normal operating conditions, the oxida tion resistant fuel elements may be oxidized to destroy the integrity of oxidation resistant SiC coatings. Further calculations in dicate that the oxidation of fuel elements could be avoided by increasing the con centration of CO from 30 mg/kg to 100 mg/kg.

关 键 词：高温气冷堆 抗氧化燃料元件 氧化行为 正常运行工况 极端事故工况 

分 类 号：TL424.64[核科学技术—核技术及应用] TL424.52