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정동유 ( Dong You Chung ),이정민 ( Jung Min Lee ),구대서 ( Dae Seo Koo ),정흥석 ( Hong Suk Chung ) 한국공업화학회 2011 응용화학 Vol.15 No.2
With the development of fusion technology, it will be necessary to store a large amount of hydrogen isotopes in the reactor fuel cycle. To achieve high- density storage of hydrogen isotopes, stable metal hydrides are considered as potential candidates. Metal hydride formers offer a safe and convenient method for tritium storage. Different metal hydrides show various storage and delivery properties. Uranium and zirconium cobalt are considered as the most applicable hydrogen isotopes storage materials. Thus, equipment for comparative experiment of hydrogen isotope storage materials was fabricated. Heating test of beds in the equipment was performed.
이정민 ( Jung Min Lee ),정동유 ( Dong You Chung ),구대서 ( Dae Seo Koo ),정흥석 ( Hong Suk Chung ) 한국공업화학회 2012 응용화학 Vol.16 No.1
A nuclear fusion fuel cycle plant is composed of various subsystems such as a hydrogen isotope storage and delivery system. Metal hydride beds are used for storing hydrogen isotope. We thus present details on the bed of hydrogen isotope storage for nuclear fusion fuel plants. A small DU bed was designed, manufactured and inspected. The thermal shields for the primary vessel were manufactured to reduce heat transfer from the primary vessel to the secondary vessel, and thermal loss. Helium leak inspections on the parts of primary & secondary vessels were performed. These results proved to have no leakage on the parts of the primary & secondary vessels.
이정민 ( Jung Min Lee ),박종철 ( Jong Chul Park ),구대서 ( Dae Seo Koo ),정동유 ( Dong You Chung ),정흥석 ( Hong Suk Chung ) 한국공업화학회 2013 응용화학 Vol.17 No.1
With an increasing demand for energy, the importance of nuclear fusion energy is increasing. Hydrogen isotopes are a main fuel for nuclear fusion reactors. Metal hydride former offers a safe and convenient method for hydrogen isotope storage. The storage of hydrogen isotopes is carried out by absorption and desorption in a metal hydride bed. These reactions require heat removal and supply respectively. Accordingly, the rapid storage and delivery of hydrogen isotopes are enabled by rapid cooling and heating of the metal hydride bed. In this study, a vertical-type hydrogen isotope storage bed is manufactured to enhance the cooling performance. We present the experimental details of the cooling of the bed.
이정민 ( Jung Min Lee ),정동유 ( Dong You Chung ),구대서 ( Dae Seo Koo ),정흥석 ( Hong Suk Chung ) 한국공업화학회 2011 응용화학 Vol.15 No.2
Filtration is the most widely utilized technique for air cleaning and sampling, and is applied in a variety of industries, such as respiratory protection, air cleaning of smelter effluents, processing of nuclear and hazardous materials, and particle collection in clean rooms. The purpose of this research is to improve the collection performance of filtration. This study was mainly focused on the characterization of filters and the way to maintain optimal performance of filtration.
구대서 ( Dae Seo Koo ),정동유 ( Dong You Chung ),정흥석 ( Hong Suk Chung ),이정민 ( Jung Min Lee ) 한국공업화학회 2011 응용화학 Vol.15 No.2
A vertical-type ZrCo bed was fabricated for recovery/delivery of hydrogen isotopes. The outer grooves and heater tubes was designed to have a good heat transfer. The helium loop and copper fins and the tube of helium loop inlet and the tube of helium loop outlet was prepared for a good heat transfer. To cool down the temperature of the ZrCo metal hydriding rapidly, the circulation of low temperature helium gas in helium loop and in tube in secondary vessel will be performed by using operating MBP602 and MBP302. And the test of recovery/delivery for vertical-type ZrCo bed will be performed. The temperature of primary vessel, ZrCo metal powder and the pressure of primary vessel will be measured, and the rates of recovery/delivery will be analyzed.
감손 우라늄 취급 중소형 글러브 박스 시스템의 설계,제작
구대서 ( Dae Seo Koo ),정동유 ( Dong You Chung ),이정민 ( Jung Min Lee ),정흥석 ( Hong Suk Chung ) 한국공업화학회 2012 응용화학 Vol.16 No.1
Small and medium-sized glove boxes for the handling of depleted uranium were designed and fabricated. We controlled the moisture and oxygen concentration to < 1 ppm and placed depleted uranium into the primary vessel of the hydrogen isotope storage bed. This system consists of a glove box, a purification system and an antechamber, etc. In this study, the characteristics of the small and medium-sized glove box system for the handling of depleted uranium are presented for each component. Operation examples of the glove box system are also presented. The fabricated small and medium-sized glove box system will be utilized for the fabrication of the hydrogen isotope storage bed.
송규민 ( Kyu Min Song ),윤세훈 ( Sei Hun Yun ),정흥석 ( Hong Suk Chung ),장민호 ( Min Ho Chang ),강현구 ( Hyun Goo Kang ),조승연 ( Seung Yen Cho ),구대서 ( Dae Seo Koo ),정도연 ( Do Yeon Jeong ),정동유 ( Dong You Jung ) 한국공업화학회 2010 응용화학 Vol.14 No.1
A rectangular type-bed of tritium storage was designed, fabricated and inspected. The storage bed was fabricated by brazing the tray plate, heater tube and helium loop. Brazing enables improved heat transfer for heating and cooling the plates. Feed through connections of the heater line and thermocouple line of the primary vessel enable the prevention of tritium leakage into the secondary vessel. The circumferential thermal reflectors and circular plate-type thermal reflectors for the primary vessel were fabricated to reduce heat transfer from the primary vessel to the secondary vessel, and thermal loss. Vacuum & leak inspections on the primary & secondary vessels for the fabricated rectangular tray-type bed were performed. These results were proved to have no leaks on the tubes of the primary & secondary vessels.