Experimental Investigation on Fuel Coolant Interaction Using Simulant Ceramic Melts in Water: Insights and Conclusions

Nitendra Singh, A. Nayak, P. P. Kulkarni
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引用次数: 1

Abstract

Steam explosion is one of the crucial and poorly understood phenomena which may occur during severe accident scenario and may lead to containment failure. In spite of several experimental and analytical studies, the root cause of steam explosion has not been understood. Recent claims in the literature suggest that the presence of fine fragmentation during steam explosion causes its occurrence. In order to investigate this and understand the root cause of steam explosion, series of experiments were performed with 50 g to 2500 g of CaO-B2O3, a corium simulant in 4.5 litre of water. It was observed that steam explosion may occur even in the absence of fine fragments, which is contrary to the claims in the literature. To investigate further, conversion efficiency analysis was performed. This suggested that the amount of thermal energy converted to mechanical energy is more important deciding factor in explaining the occurrence of steam explosion. The present study discusses the importance of conversion efficiency in deciding steam explosion and also gives a new perspective to look at steam explosion phenomenology.
模拟陶瓷熔体在水中燃料冷却剂相互作用的实验研究:见解和结论
蒸汽爆炸是一种关键且鲜为人知的现象,可能发生在严重事故场景中,并可能导致安全壳失效。尽管进行了几项实验和分析研究,但蒸汽爆炸的根本原因尚不清楚。最近文献中的说法表明,蒸汽爆炸过程中细碎片的存在导致了其发生。为了研究这一点并了解蒸汽爆炸的根本原因,在4.5升水中使用50克至2500克CaO-B2O3(一种堆芯模拟物)进行了一系列实验。据观察,即使在没有细碎片的情况下,也可能发生蒸汽爆炸,这与文献中的说法相反。为了进一步研究,进行了转化效率分析。这表明热能转化为机械能的量是解释蒸汽爆炸发生的更重要的决定因素。本研究讨论了转换效率在决定蒸汽爆炸中的重要性,并为看待蒸汽爆炸现象学提供了一个新的视角。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
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