21003 表面固化条件下における溶融物ジェットと冷却材の相互作用(OS10 マイクロ・ナノ熱流体工学(1),オーガナイズドセッション)

概要

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For the safety design of the Fast Breeder Reactor (FBR), the Post Accident Heat Removal (PAHR) is required when a hypothetical Core Disruptive Accident (CDA) occurs. To clarify the interaction between molten material and coolant such as jet breakup behavior during the CDA for the FBR, it is important to understand the dominant mechanism of jet breakup behavior. The objective of the present study is to clarify the dominant factor of the size distribution of fragments and the jet breakup length in the condition of surface solidification like the real FBR experimentally. The jet breakup behavior as interaction of simulated molten core material and coolant is observed by using high-speed video camera. The solidified fragments is gathered and classified in size, and the each size measured. The median diameter of fragments shows the independent of relative velocity. It is suggested that there is the possibility that correlation between the jet breakup lengths estimated from observed images and its median diameters in the contact interface solidification.
2010-03-09