講演情報
[1C10]Rapid Cooling of High-Temperature Bodies Coated by Copper (II) Oxid (CuO) Nanoparticle Layers
*SOM ONN OUCH1, Tomio Okawa1 (1. UEC)
キーワード：
Rapid Cooling、Quench Front Velocity、Nanoparticle Layers、Nanofluids、Capillary performance
Rapid cooling of high-temperature bodies—quenching—is critical in nuclear reactor safety, yet during severe accidents a persistent vapor film often forms between the reactor vessel and coolant, greatly limiting heat transfer. This study enhances cooling performance by depositing copper (II) oxide nanoparticle layers on copper plates through nucleate boiling in nanofluids. The coated plates are heated and quenched by a falling liquid film to evaluate how the nanoparticle layers influence quench-front velocity. High-speed infrared imaging tracks quench-front motion, while wickability tests and laser-microscope observations assess capillary behaviour and microstructure. The results show that contact temperature and capillarity strongly govern cooling performance, offering insights for improving emergency reactor-vessel cooling during severe accidents.