Formation of agglomerated debris in jet-breakup experiment using metallic melts

金属融体を用いたジェットブレイクアップ実験におけるアグロメレーションデブリの生成

岩澤 譲  ; 杉山 智之 ; 丸山 結 ; 金子 暁子*; 阿部 豊*

Iwasawa, Yuzuru; Sugiyama, Tomoyuki; Maruyama, Yu; Kaneko, Akiko*; Abe, Yutaka*

For evaluation of the debris coolability, agglomeration, which is merging of melt particles with the others and formation of massive debris, is critical in the severe accidents in light water reactors. We carried out small-scale experiments of agglomerated debris formation using metallic melt to establish a data base for modelling and validation. Molten metal of low melting point was ejected into a test section filled with water though a nozzle. A high-speed video camera recorded images of settlement of the melt particles generated form a melt jet onto a plate located in the test section. After the melt injection, we collected the debris and investigated detailed shapes of the debris. Based on the results, we assessed the feasibility of the experiments of agglomeration using the metallic melt.