倾斜条件对海上小型堆LOCA事故的影响研究 |
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引用本文: | 曹志伟,刘建昌,肖红,杨江,卢向晖,田文喜.倾斜条件对海上小型堆LOCA事故的影响研究[J].核动力工程,2019,40(5):118-123. |
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作者姓名: | 曹志伟 刘建昌 肖红 杨江 卢向晖 田文喜 |
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作者单位: | 中广核研究院有限公司,广东深圳,518000;西安交通大学核科学技术学院,西安,710049;中广核研究院有限公司,广东深圳,518000;生态环境部核与辐射安全中心,北京,100082;西安交通大学核科学技术学院,西安,710049 |
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摘 要: | 基于热工水力系统分析程序RELAP/SCDAPSIM,建立了倾斜条件下海上小型堆一、二回路系统模型和安全注入系统模型,模拟计算了不同横向和纵向倾斜角度下压力容器上接管发生双端剪切破口事故工况。计算结果表明,事故发生后,系统主要热工水力参数受纵向倾斜影响较小,受横向倾斜影响较为显著,且存在陡边效应;发生较大角度的横向倾斜时,一回路冷却剂在重力的作用下重新分布,导致堆芯水位显著降低,燃料包壳峰值温度相较于非倾斜条件下升高约520℃。
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关 键 词: | 倾斜条件 海上小型堆 直流蒸汽发生器 破口失水事故 |
Effect of Inclination Condition on LOCA for a Small Offshore Reactor |
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Abstract: | Based on the thermal-hydraulic system analysis code RELAP/SCDAPSIM, the models of the primary loop and secondary loop and the safety injection system of the small offshore reactor are built, and LOCA with a double ended break under different inclination angles are simulated. Simulation results show that, longitudinal inclination has little effect on thermal parameters of the reactor, while lateral inclination does have a significant influence, and steep edge effect exists. Particularly, when the lateral inclining with large angle occurs, there is a significant reduction of core water level due to the redistribution of liquid coolant in the primary loop, and peak cladding temperature of the fuel is raised about 520℃. |
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