• Title/Summary/Keyword: Emergency water

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A Study on the Safety Assessment of Water-based Firefighting Training Center using Fire Dynamics Simulation (FDS를 활용한 수소화 훈련장 안전성 평가에 관한 연구)

  • Doyoeng Park;Junho Kim
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.30 no.4
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    • pp.317-323
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    • 2024
  • According to the section A-VI/3 of the International Convention on Standards of Training, Certification and Watchkeeping for Seafarers (STCW), Water-based firefighting training center is mandatory to obtain onboard certificates. This space, being similar to fire situations on ships requires that safety measures be quantified to ensure occupant safety and establish operational standards. For fire safety evaluation, cases were designed based on the presence or absence of smoke control equipment using Pyrosim based on Fire Dynamics Simulation (FDS). Vector analysis was performed to evaluate flow of smoke and heat. Available safe escape time / required safe escpae time (ASET/RSET) analysis was conducted to evaluate safety by comparing the interpreted numerical results through Pathfinder. During safety evaluation of the current operational condition, the appropriateness of the function of each smoke control equipment was numerically and visually indicated. The emergency situation with dust collector stopped was expressed by each evacuation time and safety margin of 111.2 seconds, suggesting that be used as a standard of evacuation time.

Problems of Pesticide Usage in Rural Area (농촌(農村)에 있어서 농약사용(農藥使用)의 문제점(問題點))

  • Cha, Chul-Whan
    • Journal of agricultural medicine and community health
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    • v.1 no.1
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    • pp.22-28
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    • 1976
  • It has been well known that indiscriminative use of pesticides contaminates water resources and soil to break down the balance of natural ecosystem and brings acute when spray. In this country, 62,602 tons of pesticides were used in 1974 for agricultural purpose figuring 28.0 kg per hectare which showed 20% increasement every year since 1970. It is almost impossible to figure out incidence and mortality of acute pesticide poisoning exactly. However, a survey in 1974 reported that 33.5% of male and 32.7% of female who sprayed certain pesticides complained of several symptoms seemed to be due to acute pesticide poisoning. It also mentioned that the main cause inducing poisoning supposedly was dusting without protective armamation such as masks, booths, gloves and others in more than 60% of above cases. Pesticide poisoning through contamination of food or direct inhalation and contact. With the reason, the followings can be recommended to minimize or prevent pesticide hazards. 1. Strict legal control 2. Systematic education on the safe handling way of pesticides for the people who are to use them. 3. Remarkable warning at transportation and stocking of pesticides. 4. Obligatory attachment of explanation on the package about effect, safe handling method, and. emergency care at acute pesticide poisoning concerned.

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Scaling Analysis of Thermal Hydraulics Phenomena in the Nuclear Reactor Vessel Downcomer during the Reflood Phase of LBLOCA (대형냉각재 상실사고 재관수 기간 동안, 차세대 원자로 강수부 내의 열수력 현상 모의를 위한 실험장치 척도해석)

  • Yun, B.J.;Song, C.H.;Kwon, T.S.;Euh, D.J.;Chu, I.C.;Yoon, Y.J.
    • Proceedings of the KSME Conference
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    • 2001.06d
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    • pp.821-827
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    • 2001
  • As one of the advanced design features of the Korea next generation reactor, direct vessel injection (DVI) system is being considered instead of conventional cold leg injection (CLl) system. It is known that the DVI system greatly enhances the reliability of the emergency core cooling (ECC) system. However, there is still a dispute on its performance in terms of water delivery to the reactor core during the reflood period of a large-break loss-of-coolant accident (LOCA). Thus, experimental validation is under progress. In this paper, a new scaling method, using time and velocity reduced linear scaling law, is suggested for the design of a scaled-down experimental facility to investigate the direct ECC bypass phenomena in PWR downcomer.

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The Effect of Aquatic Exercise Program on Physical Fitness, Pain and Physiological Function in Patients with Osteoarthritis (수중운동이 골관절염 환자의 체력, 통증 및 생리적 기능에 미치는 효과)

  • Park, Hyoung-Sook;Kim, Hye-Sook;Kim, Nam-Hee
    • Journal of muscle and joint health
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    • v.13 no.1
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    • pp.31-42
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    • 2006
  • Purpose: The purpose of this study was to identify the effects of aquatic exercise program on physical fitness, pain and physiological function in patients with osteoarthritis. Method: The subjects of the study were thirty women(age: forty-seventy five) who have an osteoarthritis. Aquatic exercise program consist of approximately two hours of exercise in water, two days per week, for six weeks. Data were gathered from April 19 2005 to May 27 using a questionnaire and measuring physical fitness and physiological index. Data were analyzed with the SPSS Win 12.0 using frequency and paired t-test for difference between pre-exercise and post-exercise. Results: The results of this study were as follows: There were significantly increased on left shoulder (t=3.848, p=.001) and waist flexibility(t=-5.622, p=.001) scores. There were significantly decreased on pain score(t=5.288. p=.000), body weight(t=5.072, p=.001), systolic B.P(t=18.362, p=.001), diastolic B.P(t=32.558, p=.001), blood sugar(t=1.805, p=.041), total cholesterol(t=2.032, p=.026) scores. Conclusion: From these results, it is concluded that the aquatic exercise program can be effective in increasing physical fitness, physiological function and decreasing pain in patients with osteoarthritis.

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A Study on the Improving Direction of Container Housing through Field Survey - Based on the Analysis of 12 cases in the Urban Area - (국내 컨테이너 하우징의 실태조사를 통한 개선방향연구 - 수도권 지역의 12개 사례를 중심으로 -)

  • Yoo, Hae-Yeon;Park, Yeon-Jeong;Yoon, Jung-Yeon
    • Journal of the Korean housing association
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    • v.23 no.6
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    • pp.21-30
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    • 2012
  • In foreign countries, the use of containers has already been stabilized with their advantages utilized in various forms. Containers are also utilized in Korea as various forms of architecture, but domestic container buildings have poor public consciousness so as to be limitedly utilized as temporary structures based on economic efficiency. Besides, there is the lack of research and development on them. Particularly, despite the advantages of containers as housing facilities, the use of containers as short- or middle-term temporary housing is limited and does not spread. Also, compared to general housing, containers have lower quality of physical environment and even frequently bring about negligent accidents such as fire and electric shock. Thus, this study intends to identify the actual condition of using container houses, the problems in using them, and the direction of improving their residential environment. For this purpose, it analyzes the present condition and characteristics of domestic container housing, and derives conclusions from the focus group interview with 23 residents who have lived in Seoul and Gyeonggi-do for over a year about such survey items as daylighting, ventilation, privacy condition, water service and sewerage, insulation, soundproofing, view, and room scale.

A Case Study for the 1st Double-level Tunnel for Light vehicle in Urban Area in Korea (국내 최초 소형차 전용 도심지 대심도 복층터널 설계 사례)

  • Kim, Gyoung-Hun;Choi, Jun-Dong;Jun, Duk-Chan;Shin, Il-Jae;Sim, Dong-Hyun
    • Proceedings of the Korean Geotechical Society Conference
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    • 2010.09a
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    • pp.1302-1313
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    • 2010
  • The west express way is notorious for extremely heavy traffic area in the west of Seoul, South Korea. Hence, the city government recently initiated a new underground BTO (Build-Transfer-Operate) road project to solve traffic congestion and a high construction cost. The proposed underground express road being designed is the first double-level tunnel ever designed in South Korea and using Conventional tunnelling method (NATM). A total length of tunnel for light vehicles is 10.91km long including both open cut structures and concrete lining with middle-deck in bored tunnel. There are also 4 ventilation shafts for ventilation and evacuation on emergency. Many design issues had been aroused during the preliminary design phase and detail design phase is currently going on. This paper discusses design focuses including excavation methods, ground water issues, a deck slab installation, and a construction cost etc. for the double level road tunnel design of urban area.

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Characteristics of Energy Consumption in an Office Building located in Seoul (사무소건물의 용도 및 측정기간에 따른 에너지 소비 특성)

  • Park Byung-Yoon;Chung Kwang-Seop
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.17 no.1
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    • pp.82-87
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    • 2005
  • The purpose of this study is to suggest the characteristics and actual state of energy consumption by the analysis of energy consumption data in an office building. This study examines and analyzes daily and monthly energy consumption of an office building located in Seoul, Korea regarding type of load and business classification within a building. The results are as follows. 1) Energy consumption of office building for each type of load show similar consumption patterns, regardless of seasons such as cooling period and heating period. 2) Out of all annual energy consumption, consumption for lighting took about $43\;\%,$ general electric Power about $23\;\%,$ emergency power $25\;\%,$ computer center $5\;\%$ and cooling power $4\;\%,$ showing that the consumption for lighting was highest, and the percentage of energy consumption for cooling power for operation of cooling facilities took the lowest percentage. 3) Annual gas consumption used for heating and hot water supply were $38,\;36\;\%$ for officetel and office respectively, and $26\;\%$ for arcade. 4) Electricity consumptions used for cooling power for each use of building, office and officetel recorded in July and August of cooling seasons. Even though it shows different patterns for each month, energy consumption showed unique pattern throughout the cooling seasons.

Feasibility study on the Evaluation of the degree of consolidation using shear waves for soft clay deposits (전단파를 이용한 연약지반의 압밀도 평가기법 적용성 연구)

  • Youn, Jun-Ung;Kim, Jong-Tae;Lee, Jin-Sun;Kim, Dong-Soo
    • Proceedings of the Korean Geotechical Society Conference
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    • 2008.03a
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    • pp.442-451
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    • 2008
  • The evaluation of field degree of consolidation on soft clays has been an important problem in geotechnical areas. Monitoring either settlements or pore water pressures has been widely applied in the filed, but occasionally they have some problems. This study addresses the suggestion and application of another method for evaluating the degree of consolidation using shear wave velocities. A research site where soft clay layers were consolidated by surcharging loads was chosen. Laboratory tests were performed to determine the relation between shear wave velocity and effective stress. Field seismic tests were conducted several times during the consolidation of the clay layers. The tests results show that the shear wave velocity increased significantly as clays consolidated. The shear wave velocities at each field stress states were derived from the laboratory results and the degree of consolidation was evaluated by comparing the shear wave velocities obtained by laboratory and field seismic methods. In most stress states, the degree of consolidation evaluated using the shear wave velocity matched well with that obtained from field settlement record, showing the potential of applying the method using shear waves in the evaluation of field degree of consolidation on soft clay deposits.

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Architectural Design Elements for Hazard-Resistant and Reduction House (방재 및 감재주택을 위한 건축 계획 요소의 설정)

  • Kim, Hyeong-Eon
    • KIEAE Journal
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    • v.16 no.6
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    • pp.77-82
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    • 2016
  • Purpose: Almost every research carried out in our country against the natural disaster is focused on the temporary facilities such as temporary housing, emergency shelter and as a result, it is very hard to find out researches on the ordinary houses which installed integrated systems of hazard-resistant against the natural disaster. Method: To conduct this research, categorizing process for design, structural, environmental and installation elements found in the Hazard-Resistant and Reduction House built for sale in Japan was performed. Result: In this study, several design concepts and subordinate items are recommended for hazard-resistant housing. First, design concept of 'Preparedness' which means security and access to the storage storing goods especially food & beverage for the emergencies is needed. The subordinate items consist of security of stocking space, diversified and circular storage system, and safety storage system. Second, design concept of 'Security' which means security of physical safety space and rapid recovery to returning to daily life against natural disaster is needed. The subordinate items consist of many items including not only structure and facilities but also architectural design method. And finally, design concept of 'Maintenance, Support and Return' which means minimizing the physical and psychological damages and support safety and physical conditions of the victims from the impact of the disaster to returning to daily life is needed. The subordinate items consist of high efficiency insulation/airtightness design, microclimate design, combination of photovoltaic system and storage battery, non-power appliance system against the power failure, storing system for drinking water, rainwater storing and utilization system.

A Study on International Technology Trends of Next Generation Marine Mobile Systems (차세대 해상이동통신 국제 표준화 동향 연구)

  • Jang, Dong-Won
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2010.10a
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    • pp.135-138
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    • 2010
  • The goals of the Global Maritime Distress and Safety System (GMDSS) that initiated by the IMO and supported by IALA, IHO, ITU, IEC and manufacturers are to provide more effective and efficient emergency and safety communications and disseminate Maritime Safety Information (MSI) to all ships on the world's oceans regardless of location or atmospheric conditions. Much of the GMDSS is built on technologies more than 20 years old; some work well; others do not. While GMDSS requirements apply only to SOLAS vessels, there are many other vessels on the water. So some considerations are necessary for non-SOLAS vessels including fishing ships, leisure boats and small boats. This paper describes the analysis of IMO, ITU and IEC meeting results held on recently. Also it gives the trends of the international marine radio standards and its technologies.

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