下封头熔融物碎片床冷却模型研究

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Model Development on Cooling of Debris Formed of Molten Material in Lower Head

1. Nuclear Science and Technology, Xi'an Jiao tong University, Xi'an, 710049, China;
2. Science and Technology on Reactor System Design Technology, Nuclear Power Institute of China, Chengdu, 610041, China

摘要: 基于集总参数法建立严重事故下压力容器下封头熔融物碎片床冷却行为分析的数学物理模型和分析程序,然后根据试验观察现象,考虑下封头熔融物碎片床的特点,对集总参数法的相关模型进行改进,并基于文献中ALPHA试验结果对模型进行验证。结果表明,本文提出的模型能够较好地模拟严重事故下压力容器下封头熔融物冷却行为。
- 严重事故 /
- 熔融物碎片床 /
- 下封头 /
- 间隙传热
Abstract: Based on the experimental phenomena,an improved lumped parameters mathematic model has been set up and programmed for the analysis of the cooling mechanism of the debris formed of moltenmaterial,which dumped into the lower head of the vessel during a severe accident.The proposed mode has been verified by simulating the results of ALPHA tests.Results indicated that the proposed model can well predict the cooling mechanism of the debris formed of molten material,which located in the lower head of the vessel during a severe accident.
- Severe accident /
- Debris formed of molten material /
- Lower head /
- Gap heat transfer