http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 김홍두(H. D. Kim) (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
-
Application of CO₂ Technolgy in Nuclear Decontamination
박광헌(K. H. Park),김학원(H. W. Kim),김홍두(H. D. Kim),고문성(M. S. Koh),류정동(J. D. Ryu),김양은(Y. E. Kim),이범식(B. S. Lee),박현택(H. T. Park) 한국표면공학회 2001 한국표면공학회지 Vol.34 No.1
Green technology is being developed up to a point that is feasible not only in an environmental sense, but also in an economical viewpoint. This paper introduces two case studies that applied CO₂ technology into nuclear industry. 1) Nuclear laundry: A laundry machine that uses liquid and supercritical CO₂ as a solvent for decontamination of contaminated working dresses in nuclear power plants was developed. The machine consists of a 16 liter reactor, a recovery system with compressors, and storage tanks. All CO₂ used in cleaning is fully recovered and reused in next cleaning, resulting in no production of secondary nuclear waste. Decontamination factor is still lower than that in the methods currently used in the plant. Nuclear laundry using CO₂ looks promising with technical improvements-surfactants and mechanical agitation. 2) CO₂ nozzle decontamination: An adjustable nozzle for controlling the size of dry ice snow was developed. Using the developed nozzle, a surface decontamination device was made. Human oils like fingerprints on glass were easy to remove. Decontamination ability was tested using a contaminated pump-housing surface. About 40 to 80% of radioactivity was removed. This device is effective in surface-decontamination of any electrical devices like detector, controllers which cannot be cleaned in aqueous solution.
-
초음파를 이용한 초임계 이산화탄소 에멀젼내 Ni 전해도금
고문성(M. S. Koh),주민수(M. S. Joo),박광헌(K. H. Park),김홍두(H. D. Kim),김학원(H. W. Kim),한성호(S. H. Han),Nobuaki Satoc 한국표면공학회 2004 한국표면공학회지 Vol.37 No.6
Emulsions were formed through putting small quantity of nickel electroplating solution into supercritical carbon dioxide, and then electroplating in the sc-CO₂ emulsions was conducted. It is an environmental-friendly technology that can solve the treatment of a large quantity of toxic plating wastewater, which is a big problem in the existing wet plating, and also can reduce secondary waste generation fundamentally. Supercritical carbon dioxide emulsions enhanced by ultrasonic horn were formed by non-ionic surfactant and nickel solution. Plating condition within emulsions was set up as 120bar and 55℃ through measurement of electrical conductivity following the pressure change. Experiments were conducted respectively against supercritical carbon dioxide emulsions electroplating and general chemical electroplating, and then their results were compared and analyzed. As the experiment result utilizing emulsions, plating surface was formed very evenly even with a small quantity of electroplating solution, and fine particles were plated compactly without any pinhole or crack due to hydrogenation, which occurs in general electroplating. Used electroplating solution can be reused through recovery process. Therefore, this technology will be able to be applied as new clean technology in electroplating.
ScienceON
DBpia연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
