• Environmental and Resource Economics Review
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• v.13 no.2
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• pp.301-322
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• 2004

The current petroleum stockpiling by Korean government is based on the static concept of dead-stock. However, the recent changes in economic environment is requiring a transition to the dynamic concept of flow-stock. This study suggested selective trading strategies using basis of changing oil prices as an option for improving the economics of domestic strategic petroleum reserve (SPR), and quantitatively analyzed their effects. For this purpose, we tested the validity of selective trading strategies using the weekly spot and forwards prices of WTI for the period of October 1997 to August 2002. Summarizing the simulation results, the selective trading strategies would increase the expected values of profits and decrease their volatilities compared to those of traditional routine strategies. And, the adoption of trigger value could increase the improvements by the selective trading strategies. Based on the results, we suggest that, in order to improve the economics of domestic petroleum stockpiling, it is necessary to actively utilize the reserve facilities and the reserved petroleum with proper derivatives position.

• Economic and Environmental Geology
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• v.13 no.3
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• pp.185-192
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• 1980

The rocks exposed in the investigation area are andesite of Late Cretaceous age, and syenite and aplitic granite of Bulgugsa Series of Early Cretaceous Period, which is intruded in the older andesitic rock. The strike and dip of major joint is $N10^{\circ}$ to $60^{\circ}E$, and $70^{\circ}SE$ to vertical respectively. According to seismic exploration, lower velocity zone, deemed to be fractured and/or crushed zone, is appeared along the gully center of east flank of the area. Test drilling shows that andesite bedrock is mostly very hard, massive, and very fine to medium grained and has almost 100 percent RQD and core recovery. In comparision with andesitic bedrock, intruded syenite cores show that it is highly crush especially at the depth from 55m to 63m.

• KOREAN POULTRY JOURNAL
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• v.14 s.148
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• pp.46-47
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• 1982

정부는 1982년도 축산진흥 사업계획중 양계와 관련해 관측사업실시, 쇠고기 대신 돼지고기$\cdot$닭고기로 소비대체 홍보, 닭고기가격 하락시 수매비축, 계란공장(난분, 액란)설치 지원, 위생적인 도계유통을 위해 도계장 시설근대화, 닭고기 판매소 냉장고 지원 등을 계획하고 있다.

• Proceedings of the Korean Society for Rock Mechanics Conference
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• 2007.10a
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• pp.163-173
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• 2007

• Tunnel and Underground Space
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• v.16 no.4 s.63
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• pp.296-306
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• 2006

It is difficult to solve problems regarding the adjustment on demand and supply of LNG due to seasonal variations of domestic demand of LNG, a discordance among import pattern and limits of storage facilities and so on. Also, there may be instability in LNG supply due to chances of accidents at LNG producing areas. Therefore, it is very important to secure large LNG storage facilities and to stabilize LNG supply management on a long term basis. The objective of this study is to examine the real-scale applicability of a lined underground rock storage system, which have been verified by a successful operation of the Daejeon LNG pilot plant. The new technology has many advantages of better economy, safety and environment protection, for above-ground and in-ground storage systems. The results of this study may promote the first ever real scale underground LNG storage system in a rock cavern.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2020.11a
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• pp.28-30
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• 2020

우리나라 해역은 크게 동해, 서해와 남해로 나뉜다. 해역별 특성은 공간적 및 유체역학적으로 상이하여 해역별 수중거주시설의 설계에 있어 서로 다른 주요건과 시설구성을 필요로 한다. 본 연구는 거시적 수중주거시설 설계기술 연구의 일환으로서 특히 해역별 공간 특성을 잘 갖춘 3곳의 입지 후보지(동해:Phoenix point, 남해:South Brother point와 서해:Mud point)에 대하여 요구되는 해역별 설계 환경부하를 최근 태풍Haishen, 태풍Maysak과 태풍 Bavi의 기상 예측자료 및 관측자료를 통해 비교하고 가정한 건축목표(Phoenix point: 속초시에 탈탄소 전력공급, South Brother point:부산항 수소연료 비축기지 및 해상 수소충전소, Mud point:에너지 자립형 기후중립 수산양식 기지)에 부합하도록 시설구성을 제안함으로써 우리나라 연안의 천해와 심해에서의 수중거주 가능성을 조사했다.

• Journal of Korean Society of Water and Wastewater
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• v.25 no.6
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• pp.861-867
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• 2011

Wastewater from crude oil reserve base usually contains large amount of non-biodegradable contaminants. The conventional wastewater treatment progress can hardly meet the regulation of wastewater effluent quality. This study investigated the removal of non-biodegradable organic contaminants in wastewater from crude oil reserve base using a pulse UV treatment. The modified process incorporating pulse UV process was set up to treat the wastewater from crude oil reserve base. The treatment process is composed with coagulation and flocculation, micro-bubble flotation, sand filter, pulse UV system, and GAC filter. The results show CODMn was effectively removed by the process with pulse UV system and it can meet the wastewater effluent regulation. The single effect of pulse UV process in CODMn removal was not significant(9~15% based on sand filtered effluent), however with the subsequent activated carbon filter the removal ratio CODMn was increased up to 28% compared to the process without pulse UV syetem.

• The Science & Technology
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• v.35 no.2 s.393
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• pp.45-74
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• 2002

[테러리즘 현황] - 현대사회 테러리스트 공격에 속수무책, 유형ㆍ시대따라 달라도 늘 빈틈노려 덮쳐/[무력테러] - 인터넷 등 첨단기술이용 무기 현지조달, 국가안보차원서 테러 대처능력 갖춰야/[생물테러] - 생명공학 접목ㆍ소량으로 대량살상 가능, 무미ㆍ무취에 은밀ㆍ잠재성 커 무기화 박차/[화학테러] - 1차 대전때 겨자가스공격 1백30만명 사상, 북한은 61년 김일성지시에 따라 5천톤 비축/[방사능테러] 원자력발전소 등 각종 핵시설 공격 목표, 한국은 북한의 핵위협 예방 종합대책 필요/[사이버테러] 마음만 먹으면 누구나 전산망 파괴 가능, 미래 전쟁은 네트워크 파괴가 성패 갈라

• The Journal of Engineering Geology
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• v.10 no.1
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• pp.79-93
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• 2000

When caverns are excavated, it is very important to understand the distribution and charateristics of geological structures because the structures have an significant effect on grouting, rock reinforcement, and groundwater flow, etc. The main water bearing fractures have an orientation of N50~60W and these fractures are known as tension fractures. Their orientation coincides with a long elliptical axis ofpumping test, and they cross the tension fractures of N10~30E. They have typical fracture systems ofrhombic type in this area.

• Tunnel and Underground Space
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• v.18 no.1
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• pp.80-89
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• 2008

The influence of in-situ rock stress on the stability of an underground rock structure increases as the construction depth become deeper and the scale of a rock structure become larger. In general, hydraulic fracturing stress measurement has been performed in the surface boreholes of the target area at the design stage of an underground structure. However, for some areas where the high horizontal stresses were observed or where the overstressed conditions caused by topographical and geological factors are expected, it is desirable to conduct additional in-situ stress measurement in the underground construction site to obtain more detailed stress information for ensuring the stability of a rock structure and the propriety of current design. The study area was a construction site for the additional underground oil storage facility located in the south-east part of OO city, Jeollanam-do. Previous detailed site investigation prior to the design of underground structures revealed that the excessive horizontal stress field with the horizontal stress ratio(K) greater than 3.0 was observed in the construction area. In this study, a total of 13 hydraulic fracturing stress measurements was conducted in two boreholes drill from the two water tunnel sites in the study area. The investigation zone was from 180 m to 300 m in depth from the surface and all of the fracture tracing works were carried out by acoustic televiewer scanning. For some testing intervals at more than 200 m ind depth from surface, the high horizontal stress components the horizontal stress ratio(K) greater than 2.50 were observed. And the overall investigation results showed a good agreement with the previously performed test.