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首页> 美国政府科技报告 >Theoretical Investigations on the Fragmentation of Drops of Melt with Respect to the Description of Thermal Detonations (Vapor Explosions) and Their Application in the Code Frademo
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Theoretical Investigations on the Fragmentation of Drops of Melt with Respect to the Description of Thermal Detonations (Vapor Explosions) and Their Application in the Code Frademo

机译：关于热爆炸描述（蒸汽爆炸）熔体液滴破碎的理论研究及其在代码Frademo中的应用

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Vapor explosions caused by the contact of molten core material with coolant are an important issue within reactor safety analysis, because they could produce an early threat to the containment during a core melt accident. The case of steady-state propagation of a detonation wave through a coarse premixture of melt and coolant represents the most severe case of a large scale vapor explosion under reactor conditions with the highest rate and largest heat release and therefore also the highest yield of mechanical energy. The present contribution starts with the description of the integral model of the detonation wave. The fragmentation processes, which are decisive for these exchange terms and the detonation process as a whole, are dealt with also. Hydrodynamic fragmentation processes as well as a thermally induced one are considered. The processes which take place inside a detonation wave, especially the fragmentation of the drops of melt and the velocity equilibration between the melt and the coolant, determine the behavior of the wave. In the present model these processes are described within a three-phase approach, considering the drops of melt, the fragments and the coolant as separate flow phases. In the frame of this work, the computer code FRADEMO has been developed. It consists of an overall description of the processes inside a steady-state detonation wave in combination with a full description of the detailed models on hydrodynamic and thermal fragmentation presented in this report. Some useful information for the potential code user is given in the appendix of the detailed report also. (ERA citation 13:005811)

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