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首页> 外文期刊>Nuclear Engineering and Design >Thermal-hydraulic analysis of FAIDUS design for severe accident mitigation strategy in a medium size sodium-cooled fast reactor
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Thermal-hydraulic analysis of FAIDUS design for severe accident mitigation strategy in a medium size sodium-cooled fast reactor

机译:中等大小冷却快速反应器中严重事故缓解策略的陷阱设计热液压分析

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摘要

The impediment of core disruption is realized through the provision of diverse and redundant safety features in the design complemented by the use of inherent passive mechanisms that respond to the accident condition by ensuring convenient dispersal of molten core material from the core in the early stage of the accident. In light of this, a promising design strategy Fuel Assembly Inner DUct Structure (FAIDUS) core concept is proposed to enhance the axial discharge capability of molten fuel from core for the exclusion of core wide melt pool formation. The sequence of event during the course of relocation in the FAIDUS is analysed employing a transient integrated thermal-hydraulic model. The effectual performance of various FAIDUS design options in mitigating the accident is evaluated. Based on this, the preferred design choice conforming the laid down criteria is selected in the present study. The simulation results suggest that FAIDUS design concept delivers the best alternative way for extenuating accident progress through a comprehensive melt relocation strategy of greater reliability in an intrinsic way.
机译:通过在设计中提供多样化和冗余的安全特征来实现核心中断的障碍,通过使用固有的被动机制通过确保从核心从核心的熔融芯材料方便的熔融芯材料方便地分散到事故条件事故。鉴于此,提出了一个有前途的设计策略燃料组件内部管道结构(Faidus)核心概念,以增强来自芯的钢化燃料的轴向放电能力,以排除芯宽熔体池地层。分析了采用瞬态集成热液压模型的陷阱中重定位过程中的事件序列。评估了各种陷井设计选项在减轻事故时的有效性。基于此,在本研究中选择了符合铺设标准的优选设计选择。仿真结果表明,陷井设计概念通过以内在的方式更大的熔体搬迁策略提供最佳替代方法,以便通过全面的熔体搬迁策略提高事故进展。

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