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首页> 外文期刊>Nuclear engineering and technology >Implementation of a new empirical model of steam condensation for the passive containment cooling system into MARS-KS code: Application to containment transient analysis
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Implementation of a new empirical model of steam condensation for the passive containment cooling system into MARS-KS code: Application to containment transient analysis

机译：将被动遏制冷却系统蒸汽冷凝的新经验模型的实现为MARS-KS码：应用于漏洞瞬态分析

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摘要

For the Korean design of the PCCS (passive containment cooling system) in an innovative PWR, the overall thermal resistance around a condenser tube is dominated by the heat transfer coefficient of steam condensation on the exterior surface. It has been reported, however, that the calculated heat transfer coefficients by thermal-hydraulic system codes were much lower than measured data in separate effect tests. In this study, a new empirical model of steam condensation in the presence of a noncondensable gas was implemented into the MARS-KS 1.4 code to replace the conventional Colburn-Hougen model. The selected correlation had been developed from condensation test data obtained at the JERICHO (JNU Experimental Rig for Investigation of Condensation Heat transfer On tube) facility, and considered the effect of the Grashof number for naturally circulating gas mixture and the curvature of the condenser tube. The modified MARS-KS code was applied to simulate the transient response of the containment equipped with the PCCS to the large-break loss-of-coolant accident. The heat removal performances of the PCCS and corresponding evolution of the containment pressure were compared to those calculated via the original model. Various thermal-hydraulic parameters associated with the natural circulation operation through the heat transport circuit were also investigated.
机译：对于以创新的PCW（被动壳体冷却系统）的韩国设计，冷凝器管周围的总热阻由外表面上的蒸汽冷凝系数占主导地位。然而，已经报道了通过热液压系统码的计算的传热系数远低于单独效果测试中的测量数据。在这项研究中，实施了不可调味气体存在的新的蒸汽冷凝的经验模型，以替代传统的Colburn-Hougen模型。从杰里科（JNU实验钻机的冷凝试验数据（用于调查管中的冷凝传热调查）的冷凝试验数据，并考虑了对自然循环气体混合物的效果和冷凝器管的曲率的效果。修改后的MARS-KS代码用于模拟装有PCCS的漏洞的瞬态响应，以对大休息的冷却液事故。将PCC的热除去性能和容纳压力的相应演化进行比较，与通过原始模型计算的那些。还研究了通过热传输回路与天然循环操作相关的各种热液压参数。

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