B210 溶融物ジェットと冷却材の相互作用に及ぼす界面固化の影響(OS8 熱流動),動力エネルギーシステム部門20周年,次の20年への新展開)

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, the dominant mechanism of the jet breakup behavior is required. The objective of the present study is to clarify the dominant factor of the jet breakup length and size distribution of the fragments generated through the jet breakup behavior in the condition of surface solidification as simulation of phenomena in a real FBR system. A jet breakup behavior as interaction of simulated molten core material and coolant is observed with high-speed video camera. The solidified fragments are gathered and classified in size, and the each size is measured. The median diameter of the generated fragments is estimated from the mass distribution of the fragments. It is suggested that form of fragments is different by temperature conditions.
2010-06-20