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Song, Jin-Ho;Kim, Hui-Dong;Hong, Seong-Wan;Park, Ik-Gyu;Sin, Yong-Seung;Min, Byeong-Tae;Kim, Jong-Hwan;Jang, Yeong-Jo
- Transactions of the Korean Society of Mechanical Engineers B
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- v.25 no.12
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- pp.1887-1897
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- 2001
Korea Atomic Energy Research Institute (KAERI) launched an intermediate scale steam explosion experiment named "Test for Real Corium Interaction with water (TROI)" using reactor material to investigate whether the molten reactor material would lead to energetic steam explosion when interacted wish cold water at low pressure. The melt-water interaction experiment is performed in a pressure vessel with the multi-dimensional fuel and water pool geometry. The novel concept of cold crucible technology, where powder of the reactor material in a water-cooled cafe is heated by high frequency induction, is firstly implemented for the generation of molten fuel. In this paper, the lest facility and cold crucible technology are introduced and the results or the first series of tests were discussed. The 5 kg of molten ZrO$_2$jet was poured into the 67cm deep water pool at 30 ∼ 95 $\^{C}$. Either spontaneous steam explosions or quenching was observed. The morphology of debris and pressure wave profiles clearly indicate the differences between the two cases.
https://doi.org/10.22634/KSME-B.2001.25.12.1887 인용 PDF

Choi, Hyun-Min;Kim, Young-Chool;Seok, Jeong-Won
- Journal of the Korean Crystal Growth and Crystal Technology
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- v.29 no.1
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- pp.24-31
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- 2019
The current study demonstrates an efficient procedure to create ingots from $Al_2O_3$ powder using the skull melting method to use these ingots as a starting material in conventional methods for growing synthetic single-crystal sapphire. Dimension of the cold crucible was 24 cm in inner diameter and 30 cm in inner height, 15 kg of $Al_2O_3$ powder was completely melted within 1 h at an oscillation frequency of 2.75 MHz, maintained in the molten state for 3 h, and finally air-cooled. The areal density and components of the cooled ingot by parts were analyzed through scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDS). The areal density and $Al_2O_3$ content of the ingot were related to the temperature distribution inside the cold crucible during high-frequency induction heating, and the area with high temperature was high tends to be high in areal density and purity.
https://doi.org/10.6111/JKCGCT.2019.29.1.024 인용 PDF KSCI HTML