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首页> 外文期刊>Nuclear Engineering and Design >Experimental investigation of quenching behavior of simulant material CaO-Fe_2O_3 under bottom flooding with the effect of melt volume
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Experimental investigation of quenching behavior of simulant material CaO-Fe_2O_3 under bottom flooding with the effect of melt volume

机译：熔体体积效应下爆破底液下模拟材料猝灭行为的实验研究CAO-FE_2O_3

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摘要

In a severe accident of a nuclear reactor, the termination and stabilization of the melt pool are necessary for the safety of the reactor. To address this issue, melt pool coolability plays a significant role in severe accident scenarios. In the context of this coolability measures, there are three major techniques i.e. top flooding, bottom flooding, and indirect cooling were used in the past and also in the present scenario to analyzed the actual phenomena occurred during a severe accident in a nuclear reactor with numerous simulant material of different composition and melt volume. This is because of extremely difficult to use the prototype material and conditions. Among the various strategy of melt coolability, it has been found that the melt coolability with the bottom flooding technique is very efficient to quench the material within a few minutes. In this regard, the present paper has involved the study of quenching phenomena of melt pool using bottom flooding at a small scale with a simulant material CaO-Fe2O3 at two different melt volume i.e. 1 l and 2 l. The simulant material is melted into an electric furnace at 1420 degrees C (similar to 200 degrees C superheat) and poured into the test section where it has been quenched through water induction by a nozzle (12 mm) from the bottom side. Temperature history has been analyzed along the radial and axial direction of melt flow and further particle size and porosity of debris were measured. The size of debris was measured in the range of 0.4 to 40 mm although this debris was so fragile in nature. The average porosity was measured as 56% and the result was found in good agreement with literature.
机译：在核反应堆的严重事故中，熔融池的终止和稳定是对反应器的安全性必需的。为了解决这个问题，熔融池冷却性在严重事故情景中起着重要作用。在这种冷却性措施的背景下，过去使用了三种主要技术，即过去的洪水，底部洪水和间接冷却，并且在目前的情况下，分析了在核反应堆的严重事故中发生的实际现象的实际现象不同成分和熔体体积的模拟材料。这是因为使用原型材料和条件非常困难。在熔融冷却性的各种策略中，已发现与底部泛洪技术的熔体冷却性非常有效，以在几分钟内淬灭材料。在这方面，本文涉及使用底部溢出以小规模的爆破池淬火现象的研究，其中模拟材料CaO-Fe2O3在两种不同的熔体体积中。1 L和2L。将模拟材料在1420℃（类似于200摄氏度的过热）中熔化成电炉，并倒入试验部分，在那里它已经通过从底侧的喷嘴（12mm）诱导淬灭。沿着熔体流动的径向和轴向分析了温度历史，并测量碎片的进一步粒度和孔隙率。虽然这种碎片在自然界中如此脆弱，但在0.4至40mm的范围内测量碎片的尺寸。将平均孔隙率测量为56％，结果与文献吻合良好。

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