• 한국건축시공학회지
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• 제18권4호
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• pp.363-373
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• 2018

고층 공동주택에서 화재시 현관문을 통해 탈출이 불가능할 경우를 대비해 발코니를 통해 피난이 가능하도록 피난시설을 설치한다. 이는 공동주택 세대의 양방향 피난이 가능하게 하며, 이로 인해 인명피해를 줄일 수 있다. 본 연구에서는 양방향 피난시설인 경량 칸막이, 발코니 대피 공간, 실내형 하향식 피난구의 특징을 살펴보고 이들의 문제점을 개선한 실외형 하향식 피난구를 제시하고 경제성에 대해 분석하였다. 화재 발생 시 피난자는 전통식 피난구를 사용할 때보다 하향식 피난구를 사용할 때 능동적인 탈출 가능 여부를 더 자율적으로 판단 할 수 있다. 따라서 피난자의 피난방식에 따라 피난소요시간에 미치는 영향을 고려하여 계단식과 하향식 피난구를 통한 4가지 피난방식의 피난 소요시간은 시뮬레이션 pathfinder를 활용하여 비교분석하였다. 피난 소요 시간 단축을 위한 적합한 대피방식을 예측 분석 판단하였다. 본 연구의 결과 고층 아파트 하향식 피난구는 계단식보다 총 피난소요시간을 단축할 수 있는 것으로 분석되었다.

• 의료ㆍ복지 건축 : 한국의료복지건축학회 논문집
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• 제22권3호
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• pp.7-15
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• 2016

Purpose: As medicare services have gotten spreaded, clinical laboratory has been dominant position. So, it has been acted for quality control and clinical pathology accreditation. But there has been quite deficient information to evaluate working space and technical standards of medical laboratory for accreditation. This study goals to figure out accreditation standard and design guideline for clinical laboratory, and to give safe and efficient design information. Methods: This study has been searched by literature for accreditation standards and design guidelines of clinical pathology in USA, UK, and Germany. Results: Three countries have accredited based on working lab space, staff space, storage space, patient space and health and safety equipment. Design guidelines of three countries commonly have focused on worktable layout, worktable distance and module, and specific laboratory biosafety level. And USA guidelines stress on the architectural design such as design process and passage distance for escape, UK stress on the efficiency as functional work flow and construction cost, lastly Germany design guidelines stress on the operator's safety distance and workstation. Three countries have not only accreditation standards but also design guidelines for more specific quality management, separating from accrediting institute. Implications: In korea, it has been needed to make clinical laboratory design guideline for the safe and efficient environment and reliable and competitive medical service.

• Nuclear Engineering and Technology
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• 제47권1호
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• pp.11-25
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• 2015

The accident at Japan's Fukushima Daiichi nuclear power plant in March 2011, caused by an earthquake and a subsequent tsunami, resulted in a failure of the power systems that are needed to cool the reactors at the plant. The accident progression in the absence of heat removal systems caused Units 1-3 to undergo fuel melting. Containment pressurization and hydrogen explosions ultimately resulted in the escape of radioactivity from reactor containments into the atmosphere and ocean. Problems in containment venting operation, leakage from primary containment boundary to the reactor building, improper functioning of standby gas treatment system (SGTS), unmitigated hydrogen accumulation in the reactor building were identified as some of the reasons those added-up in the severity of the accident. The Fukushima accident not only initiated worldwide demand for installation of adequate control and mitigation measures to minimize the potential source term to the environment but also advocated assessment of the existing mitigation systems performance behavior under a wide range of postulated accident scenarios. The uncertainty in estimating the released fraction of the radionuclides due to the Fukushima accident also underlined the need for comprehensive understanding of fission product behavior as a function of the thermal hydraulic conditions and the type of gaseous, aqueous, and solid materials available for interaction, e.g., gas components, decontamination paint, aerosols, and water pools. In the light of the Fukushima accident, additional experimental needs identified for hydrogen and fission product issues need to be investigated in an integrated and optimized way. Additionally, as more and more passive safety systems, such as passive autocatalytic recombiners and filtered containment venting systems are being retrofitted in current reactors and also planned for future reactors, identified hydrogen and fission product issues will need to be coupled with the operation of passive safety systems in phenomena oriented and coupled effects experiments. In the present paper, potential hydrogen and fission product issues raised by the Fukushima accident are discussed. The discussion focuses on hydrogen and fission product behavior inside nuclear power plant containments under severe accident conditions. The relevant experimental investigations conducted in the technical scale containment THAI (thermal hydraulics, hydrogen, aerosols, and iodine) test facility (9.2 m high, 3.2 m in diameter, and $60m^3$ volume) are discussed in the light of the Fukushima accident.

• 한국화재소방학회논문지
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• 제34권4호
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• pp.107-114
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• 2020

국가 산업의 발달에 따라 노인, 장애인, 아동 등 노유자에 대한 중요성이 인식되고 있고, 노유자시설의 수도 증가하고 있다. 노유자시설에서 발생하는 화재는 막대한 인명피해를 야기한다. 이를 대응하기 위해서는 신속·정확한 경보와 피난경로의 확보가 중요하다. 이에 본 연구에서는 노유자시설 관련 법령과 통계자료를 검토하고, 노유자 등의 법적용어의 상이, 경보설비의 비화재보 문제, 방화구획기준의 사각지대, 피난경로 확보문제, 인명안전구조기구의 기준부재의 문제점을 확인하였다. 개선방안으로 노유자 등의 유사용어에 대한 법적정의 정리, 비화재보 점검체크리스트 제안, 방화구획 관련기준 제정, 피난용 승강기의 도입, 인명안전구조기구 기준 제정 및 대피자용 방염물품비치를 제안하였다.

• 한국농촌건축학회논문집
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• 제11권2호
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• pp.37-44
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• 2009

The purpose of this study is to clarify the characteristics of daily living and the location of welfare facilities for the aged in the local city. The thorough investigation and observation works were made to them from the view points of daily living behaviors and behavioral places of the recuperating elderly and location of welfare facilities. This article discusses about the actual condition of the daily living activities of 252 elderly in 4 facilities. The results of this study are summarized as follows; We must actively prepare for the advanced age society to the increase of the elderly man population. The elderly man welfare facilities expansion needs the range who do not escape from existing a life area of the aged. The city of Sa-cheon the elderly man welfare facilities have got on favorable terms ready in the locational environment. But an facilities in the west area need to preparable emergency happen that facility construction. The usage of behavioral places in recuperating facilities are influenced by the physical environments and the basic characteristics of the elderly.

• 한국대기환경학회지
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• 제23권4호
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• pp.478-486
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• 2007

Numerical analysis had been performed to understand flow characteristics of the flue gas and slurry in the absorber of a flue gas desulphurization (FGD) system using computational fluid dynamics (CFD) technique. Two-fluid(Euler-Lagrangian) model had been employed to simulate physical phenomenon, which slurry particles injected through slurry spray nozzles fall down and bump into the flue gas inflowing through inlet duct. It was not necessary to adopt pre-defined pressure drop inside the absorber because interaction between flue gas and slurry particles was considered. Hundreds of slurry spray nozzles were considered with the spray velocity at the nozzles, swirl velocity and spreading angle. The results note that the flow disturbance of flue gas is found at the bottom of the absorber, and the current rising with high speed stream is observed in the opposite region of the inflow duct. The high speed stream is reduced as the flue gas goes up, because the high speed stream of flue gas dumps falling slurry particles due to momentum exchange between flue gas and slurry particles. In spite of some disproportion in slurry distribution inside the absorber, escape of slurry particles from the absorber facility is not observed. The pressure drop inside the absorber is mainly occurred at the bottom section.

• 한국해양환경ㆍ에너지학회지
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• 제1권2호
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• pp.40-51
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• 1998

유벽에 의하여 가두어진 오일의 조류중 거동을 회류수조에서 2차원적인 실험설비를 이용하여 살펴보았다. 유벽을 적정 깊이의 수직판으로 대치하고 레이저 광원을 이용하여 오일과 물과의 경계면 변형을 2 종류의 오일 (콩기름과 경유)에 대하여 관찰하였다. 적용된 조건으로 조류의 속도는 10 cm/s - 35 cm/s, 유벽의 깊이는 4 cm 와 8 cm, 그리고 유량은 2 liter - 8 liter 의 변화를 주었다. 다양한 경계면의 거동과 조건에 따른 누유의 손실 방식을 차원해석을 통하여 정리하고 유적누유와 연속누유의 발생 메카니즘을 설명하였다.

• 대한간호학회지
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• 제39권2호
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• pp.166-176
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• 2009

Purpose: The purpose of the study was to identify functional structure and patterns of dialogue sequence in conversations between elderly patients with dementia and nurses in a long-term care facility. Methods: Conversation analysis was used to analyze the data which were collected using video-camera to capture non-verbal as well as verbal behaviors. Data collection was done during February 2005. Results: Introduction, assessment, intervention, and closing phases were identified as functional structure. Essential parts of the conversation were the assessment and intervention phases. In the assessment phase three sequential patterns of nurse-initiated dialogue and four sequential patterns of patient-initiated dialogue were identified. Also four sequential patterns were identified in nurse-initiated and three in patient-initiated dialogues in the intervention phase. In general, "ask question", "advise", and "directive" were the most frequently used utterance by nurses in nurse-initiated dialogue, indicating nurses' domination of the conversation. At the same time, "ask back", "refute", "escape", or "false promise" were used often by nurses to discourage patients from talking when patients were raising questions or demanding. Conclusion: It is important for nurses to encourage patient-initiated dialogue to counterbalance nurse-dominated conversation which results from imbalance between nurses and patients in terms of knowledge and task in healthcare institutions for elders.

• 여성건강간호학회지
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• 제14권1호
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• pp.44-55
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• 2008

Purpose: This study was done to assess the personal experiences of the coping process during pregnancy for single mothers. Methods: The participants were 17 single mothers who had stayed in a social welfare facility. Data was collected with an in-depth unstructured interview. Data analysis was done by the grounded theory method. Results: One-hundred twelve concepts and 49 sub-categories were confirmed in the analysis. The sub-categories were grouped into 19 categories; escape from a miserable family, wrong meeting, openness of sex, defenseless state of pregnancy, inevitable result of pregnancy, heartbreak by herself, closure, isolation, difficult situation of being alone, stigma, supporting & protecting, helplessness, seeking, empowering, feeling of loss, conflict, facing issues, assuring a fresh start and becoming-mature. "Being driven over the edge of a cliff" was the key phenomenon which the single mothers experienced during the process of pregnancy. Conclusion: The above results will help nurses assessing single pregnancy mothers' needs and developing a nursing intervention program for supporting them. Therefore, nurses will be able to stop them from "being driven over the edge of cliff". A more vigorous nursing intervention is suggested for the research of the vulnerable classes of medical health care including single pregnant mothers.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2003년도 춘계학술대회논문집
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• pp.82-87
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• 2003

Nuclear fuel with a big slenderness ratio is susceptible to flow-induced vibration under very severe conditions of high temperature, high flow and exposure to irradiation in nuclear reactor. The fuel assembly should, therefore, be designed to escape any resonance due to the vibration during the reactor operation, in particular, in case of the design changes. In addition, the amplitudes due to the grid vibration, the fuel rod vibration and the fuel assembly vibration should be minimized to reduce the grid-to-rod fretting wear. Fuel assembly vibration tests in air at room temperature and in water at high temperature have been performed to investigate fuel vibration behaviors. The frequency and damping during the test in air have been compared to those in water. Through the hydraulic test, the advanced assembly has been evaluated not to be susceptible to any resonance. In addition, the test data from the tests can be used to make fuel model and to evaluate grid-to-rod fretting wear.