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황성태,김병호,정지영,김광락,정경채 한국공업화학회 1998 응용화학 Vol.2 No.1
Corrosion in molten sodium systems results in liberation of hydrogen. Sodium hydride thus must be removed by the purification system. In order to study the dehydrogenation behavior, a dynamic crystallization analysis was carried out on a cold trap packed with wire mesh packings. This analysis accounted for mixing in the crystallizer, hydride buildup on the packing, and precipitation of hydride in different portion of packing section. The results showed that this model would be useful for assisting cold trap designer to achieve the optimum design for specific application.
김병호,권상운,황성태,유재형,김응호,안병길,정지영 한국공업화학회 2000 응용화학 Vol.4 No.1
The technology on the transmutation of nuclear waste has been developed to reduce the long term risks during the storage of the spent nuclear fuels, which contain the long-lived radioactive nuclides. It was studied on the fluorination of zirconium to investigate the preparation of the fuel for transmutation reactor. Solid zirconium was reacted with diluted hydrogen fluoride gas to produce zirconium fluoride in the monel tubular reactor. Fractional conversion was increased with the increasing mole fraction of hydrogen fluoride and reaction temperature. It was found that zirconium should be fluorinated under the 600℃ to overcome the sublimation problem of the produced zirconium fluoride and the spent nuclear fuel should be decladded and chopped into small pieces to reduce the fluorination time. Among the various gas - solid reaction models, 3- dimensional diffusion-controlled model was most suitable for the reaction. It was calculated from the model that 11 hours are required to fluorinate the zirconium sphere of 1㎜ diameter.
김병호,권상운,정경채,김광락,황성태 한국산업안전학회 1998 한국안전학회지 Vol.13 No.3
Analysis on the study for the sodium fire mitigation was carried out using the CONTAIN-LMR code. Sodium loop building was partitioned into the many cells, in which the safety venting systems were installed for the purpose of improving the sodium fire safety and minimizing its effect on the sodium loop building. The effects of sodium fire on sodium loop building partitioned into the many cells and not partitioned were investigated. The peak pressure and temperature of each cell accompanied by sodium fire in sodium loop building partitioned were lower than those of sodium loop building not partitioned. In the case of partitioning sodium loop building, the pressures, temperatures and aerosols into cells were transferred through propagation path of CONTAIN-LMR sodium fire model simulated by this study, and the effect of sodium spray fire on sodium loop building was mitigated by partitioning building. In addition, the excessive rise of pressure into cells was prevented by installing the over-pressure exhaust valve and under-pressure exhaust valve on the flow path between cells.