• Korean Architects
• /
• v.2 no.4 s.4
• /
• pp.51-62
• /
• 1967

• Proceedings of the Korean Nuclear Society Conference
• /
• 2001.10a
• /
• pp.339.1-339
• /
• 2001

• Korean Architects
• /
• v.2 no.3 s.3
• /
• pp.66-77
• /
• 1967

• Water for future
• /
• v.50 no.12
• /
• pp.9-14
• /
• 2017

• Korean Architects
• /
• v.3 no.6 s.6
• /
• pp.61-72
• /
• 1968

• Korean Architects
• /
• v.3 no.7 s.7
• /
• pp.73-83
• /
• 1968

• Tunnel and Underground Space
• /
• v.23 no.4
• /
• pp.319-325
• /
• 2013

The objective of this study is to assess risks which might occur in connection with the storage of the highly compressed air in underground opening. Risk factors were selected throughout literature survey and analysis for the characteristic of CAES. Large risk factors were categorized in three components; planning and design phase, construction phase, and operation & maintenance phases. Large category was composed of 8 medium risk groups and 24 sub-risks. AHP technique was applied in order to analyze the questionnaires answered by experts and high-risk factors were selected by evaluating the relative importance of risks. AHP analysis showed that the operation & maintenance phases are the highest risk group among three components of large category and the highest risk group of eight medium risk groups is risk associated with the quality and safety. Risk having the highest risk level in 24 sub-risks is evaluated to be a failure of tightness security of inner containment storing compressed air.

• Transactions of the Korean Society of Mechanical Engineers
• /
• v.14 no.6
• /
• pp.1629-1638
• /
• 1990

Using a 1/10 scale model pump, which is designed and manufactured to simulate two phase performance of reactor coolant pump of Y.G.N

• Resources Recycling
• /
• v.11 no.1
• /
• pp.9-18
• /
• 2002

Printed wiring boards(PWBs) of the obsolete computers are composed of various organic and inorganic compounds as well as metals and alloys. As convinced that the valuable metals obtained from the PWBs are effectively utilized as secondary resources when recovered by economical methods, in this study, an investigation for characterizing the physical separation techniques is conducted. For the recovery of them, the sockets and chips dismantled from PWBs by scraping and residual resin boards are subjected to the appropriate separation processes according to the physical properties of each part. In the case of crushed socket scraps size ranged from -2.36 mm to +1.18 mm, approximately 97 wt% of the product obtained by magnetic separation consists of metallic compounds. In the case of chip scraps, 97% of Fe-Ni alloy and 95% of Cu metal are recovered by the combined process of air classification and dry magnetic separation in the size range from -2.36 mm to +0.15 mm. Ball milling is adopted in order to improve the removal efficiency of the thin-printed metallic materials on the residual resin boards and approximately 77% of Cu metal is recovered by zigzag separation after ball milling.

• 한국지구과학회:학술대회논문집
• /
• 2010.04a
• /
• pp.92-94
• /
• 2010

최근 대류권과 성층권 사이에서 매우 빠른 속도로 부는 제트류(jet stream)가 장마 전선에 유입되면서 다량의 수증기 공급으로 인한 집중호우의 발생빈도가 증가하고 있다. 집중 호우는 상, 하층 제트류 사이에서 주로 발생하며, 상층 제트류는 제트류의 남쪽과 하층에서 상승기류를 유발하는 역할을 하고 하층 제트류는 남쪽 및 남서쪽에서 따뜻하고 습윤한 공기를 북쪽 및 북동쪽으로 수송하는 중요한 역할을 한다. 상, 하층 제트류가 교차되거나 근접할수록 상하층의 온위차가 커지고, 연직시어도 증가되며, 또한 두 제트류가 중첩되는 경우에는 2차 순환이 강화되어 호우가능성이 높아진다. 한반도의 경우는 지리적으로 경압성이 강한 동아시아에 위치하여 전반적으로 잘 구조화된 하층제트를 형성하여 호우의 제반 여건을 형성하므로, 하층제트의 영향에 직접적으로 관계한 집중호우의 사례를 분석하였다.