• 부모자녀건강학회지
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• 제6권2호
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• pp.147-158
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• 2003

The purpose of this study was to investigate the situation of occurrence of disease and accidence of child care center. The subjects of this study were 17 public district child care centers, but only one center kept their health diary. Therefore, it became finally the only subject for this study. The data were collected through the analysis it's health diary and case reports for emergency. The collected data were analyzed by the number of cases, age and sex, types of case, and the emergency case were analyzed by age, background, types of accidents and follow up. The number of cases of disease and accident in 2002 were 572. In sexual difference, boys more have accident than girls. The teachers and the outsiders also frequently use the health care service. Smallpox and epidemic conjunctivitis were spreaded during winter and summer. In causes of accidents, 'accident by other child' were 98%. In emergency cases, 1 pierced wound, 1 dislocation, 2 dental emergencies, 4 eyeball contusion and bleedings and 2 burns were occurred. all the cases of emergency were performed follow up education. On the basis of above data, there will be needed to intensify health and safety subjects in curriculum for the teacher of child care, and health and safety education for child. Each child care centers must have health care manager and the network for emergency. To enhance the quality of child care service, government have to offer financial and systematical support.

• Child Health Nursing Research
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• 제3권2호
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• pp.131-141
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• 1997

The purpose of this study was to propose for protection of childhood injury or accident and to provide safety measures. Data was collected from 2,052 who visited emergency room of E University Hospital during 1 year period from January to December, 1996. The results were as follows : 1. The most common type of accident was fall down (53.4%). 2. Male patients outnumbered female by the ratio of 1.68 : 1. 3. The highest incidence rate of accidents were observed in children between 1-3 years age group(34.9%). 4. Accidents were seasonally more frequent in spring(28.2%). 5. Accidents mainly took place at home (63%). 6. The time of accidental occurrence appeared to be predominantly high during a day 8 : 00 PM to 0 : 00 AM (35.l%). 7. The most frequent involved part of body was head and face (74%). 8. Most patients discharged from the hospital in good condition(85.4%). Through clinical analysis, in the relation to accident, there were statistically significant difference in sex, age, season, injury place(all p=0.000).

• 한국응급구조학회지
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• 제22권1호
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• pp.35-47
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• 2018

Purpose: The purpose of this study was to investigate both the occurrence status of emergency vehicles traffic accidents and contents of the experiences of emergency medical technicians (EMTs) in fire station. Methods: A self-reported questionnaire was completed by 451 EMTs in fire stations in 6 cities provinces from February 9, 2017 to February 27, 2017. Results: Of 451 EMTs, 207 (45.9%) had traffic accidents experience. Regarding environment-related features, results indicated hour (12~18 hours), place (national highway), traffic flow (smooth), weather (clear), season (winter), and day (Friday). Regarding correlation analysis of differences in the number of ambulance traffic accidents pursuant to general features of accident-experienced drivers as a human factor, there were no significant differences in recruitment, driving careers of regular cars, driving careers of fire engines, and class but there were significant differences in fire-fighting careers. Accident experience in the group with careers over 6 years and less than 10 years higher than in the other groups. Conclusion: Efforts to expand fire engine driving education programs for the prevention of traffic accidents involving 119 emergency vehicles are required.

• Nuclear Engineering and Technology
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• 제52권5호
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• pp.1051-1065
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• 2020

Safety analysis of nuclear power plant (NPP) especially in accident conditions is a basic and necessary issue for applications and commercialization of reactors. Many previous researches and development works have been conducted. However, most achievements focused on the safety reliability of primary pressure system vessels. Few literatures studied the structural safety of huge concrete structures surrounding primary pressure system, especially for the fourth generation NPP which allows existing of through cracks. In this paper, structural safety reliability of concrete structures of HTR-PM in accidental double-ended break of hot gas ducts was studied by Exceedance Probability Method. It was calculated by Monte Carlo approaches applying numerical simulations by Abaqus. Damage parameters were proposed and used to define the property of concrete, which can perfectly describe the crack state of concrete structures. Calculation results indicated that functional failure determined by deterministic safety analysis was decided by the crack resistance capability of containment buildings, whereas the bearing capacity of concrete structures possess a high safety margin. The failure probability of concrete structures during an accident of double-ended break of hot gas ducts will be 31.18%. Adding the consideration the contingency occurrence probability of the accident, probability of functional failure is sufficiently low.

• 공업화학
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• 제33권4호
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• pp.408-418
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• 2022

Marine accidents involving the entanglement of marine litter have continued to increase, with over 300 to 400 cases per year according to the statistical agency. Entanglement of marine litter may also lead to large-scale marine accidents which cause capsizing and sinking, thereby further causing detrimental casualties and material damages, and thus exceptional attention and care are required. In this study, Incheon, Busan, and Geoje and Tongyeong were found to be the high-frequency locations for accidents, which were selected by considering the ArcGIS analysis about the marine accidents of entanglement of marine litter and the occurrence frequency by the standard. The characteristics of the multiple accident areas involving entanglement of marine litter were the coastal cities where fishing facilities or marine leisure related conditions were activated, with the port which handles much of the traffic of outbound and inbound vessels located nearby. Marine plastic pollution impacts not only the marine ecosystem and food chain, but also the hull and engine of ships, and may further pose threats to the safety of vessels and crews. It is necessary to find a common link between the relevant areas and to strive to remove the root causes of marine accidents by reducing marine litter.

• 문화기술의 융합
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• 제8권4호
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• pp.323-330
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• 2022

대학 연구실 내 다양한 화학적, 물리학적, 생물학적 유해위험요인들로 인해 안전사고는 꾸준히 발생하고 있으며 이를 개선하기 위한 정부 정책하에 각 대학은 연구실 사전유해위험인자 도출, 연구환경측정 등 다양한 노력을 하고 있다. 본 연구에서는 2016-2020년간 종합대학 연구실 사고사례 192건에 대한 통계 및 교차분석을 통해 사고 발생의 경향 및 관련 인자들의 상관관계를 도출하였다. 주요 인자별 상관관계로부터 대응 방향과 전략을 마련하였으며 연구실 사고에 대한 기존의 정책 방향을 비교·분석하여 연구실 안전관리제도의 개선방향을 제시하였다.

• Nuclear Engineering and Technology
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• 제56권3호
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• pp.873-879
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• 2024

A sodium-cooled fast reactor (SFR) core has a potential of prompt criticality due to a change of core material distribution during a severe accident, and the resultant energy release has been one of the safety issues of SFRs. In this study, the safety assessment of an unprotected loss-of-flow (ULOF) in a small SFR (SSFR) has been performed using the SIMMER-IV computer code, which couples the models of space- and time-dependent neutronics and multi-component, multi-field thermal hydraulics in three dimensions. The code, therefore, is applicable to the simulations of transient behaviors of extended disrupted core material motion and its reactivity effects during the transition phase (TP) of ULOF, including a potential of prompt-criticality power excursions driven by fuel compaction. Several conservative assumptions are used in the TP analysis by SIMMER-IV. It was found out that one of the important mechanisms that drives the reactivity-inserting fuel motion was sodium vapor pressure resulted from a fuel-coolant interaction (FCI), which itself was non-energetic local phenomenon. The uncertainties relating to FCI is also evaluated in much conservative way in the sensitivity analysis. From this study, the ULOF characteristics in an SSFR have been understood. Occurrence of recriticality events under conservative assumptions are plausible, but their energy releases are limited.

• 해양환경안전학회지
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• 제28권5호
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• pp.780-790
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• 2022

해양사고 예방을 위해서는 사고의 원인과 결과에 대한 분석 및 진단뿐만 아니라, 사고의 발생 패턴과 변화 추이를 예측함으로써 정량적 위험도를 제시할 필요성이 있다. 선박교통과 관련된 해양사고 예측은 선박의 충돌위험도 분석 및 항해 경로 탐색 등 선박교통의 흐름에 관한 연구가 주로 수행되었으며, 해양사고의 발생 패턴에 대한 분석은 전통적인 통계 분석에 따라 제시되었다. 본 연구에서는 해양사고 통계 자료 중 선박교통관련 사고의 월별, 시간대별 발생 현황 데이터를 활용하여 해양사고 발생 예측 모델을 제시하고자 한다. 국내 해양사고 발생 현황 중 월별, 시간대별 데이터 집계가 가능한 1998년부터 2021년까지의 통계자료 중 선박교통 관련 데이터를 분류하여 정형 시계열 데이터로 변환하였으며, 대표적인 인공지능 모델인 순환 신경망 기반 장단기 기억 신경망을 통하여 예측 모델을 구축하였다. 검증데이터를 통하여 모델의 성능을 검증한 결과 RMSE는 초기 신경망 모델에서 월별 52.5471, 시간대별 126.5893으로 나타났으며, 관측값으로 신경망 모델을 업데이트한 결과 RMSE는 월별 31.3680, 시간대별 36.3967로 개선되었다. 본 연구에서 제안한 신경망 모델을 기반으로 다양한 해양사고의 특징 데이터를 학습하여 해양사고 발생 패턴을 예측할 수 있을 것이다. 향후 해양사고 발생 위험의 정량적 제시와 지역기반의 위험지도 개발 등에 관한 추가 연구가 필요하다.

• 한국ITS학회 논문지
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• 제16권1호
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• pp.117-130
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• 2017

자전거는 측면 충돌 사고 시 대형사고로 이어지고 있으며 위험상황 시 적극적인 대처가 어렵기 때문에 사고를 사전에 예방하는 것이 매우 중요하다. 본 연구는 자전거 안전운전 지원기술의 일환으로 전국의 자전거 사고 데이터와 수치지도(Digital Map)의 도로속성 정보를 기반으로 자전거 사고 위험존을 설정하고 이를 활용하여 자전거 이용자에게 시의적절한 안전정보를 제공할 수 있도록 하는 방안을 연구하였다. 실제 사고 데이터를 이용해 선정한 지점을 '위험존'이라 하였고, 이러한 위험존을 바탕으로 모델화 하여 생성한 잠재적 사고발생 예상지점을 '논리위험존'이라 하였다. 본 연구에서 도출된 자전거 사고 논리 위험존 설정 연구 결과는 전국의 자전거 사고지점의 지점별 특수성을 네트워크 데이터를 통해 논리위험존 형태로 일반화 하였다는데 의미가 있다.

• 대한교통학회지
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• 제21권2호
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• pp.45-60
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• 2003

중앙선 침범 관련 사고는 다른 사고에 비해 사고빈도는 낮지만 치명적인 사고로 이어질 가능성이 높기 때문에 이에 대한 적절한 사고감소대책이 필요하다. 중앙선 침범을 방지하는 대표적인 도로안전시설물이라 할 수 있는 중앙분리대는 도로의 안전 확보에 중요한 역할을 하며, 실제 그 효과에 대한 구체적인 분석을 통하여 향후 중앙분리대의 적극적인 활용을 도모하는 것을 연구의 목적으로 하고 있다. 따라서 본 연구에서는 중앙분리대의 형식, 성능 등에 대한 검토에 앞서 기본적으로 중앙분리대의 설치와 교통사고와의 관계를 분석해 보았다. 즉, 중앙분리대의 사고감소효과를 파악하기 위해 우리나라 4차로 이상의 일반국도를 대상으로 중앙분리대 설치 여부에 따른 사고자료를 비교하였다. 보다 체계적이고 효과적인 분석을 위해 총 사고뿐만 아니라 유형별·사고강도별·시간대별 사고를 비교하였으며, 다양한 효과척도(사고율. 사고점유율. EPDO)를 이용하여 사고빈도뿐만 아니라 사고강도까지 비교하였다. 지점별·구간별 사고분석 및 중앙분리대 신설지점에 대한 효과분석 결과 중앙분리대의 설치는 사고빈도와 함께 사고강도를 낮춤으로써 확실한 사고감소효과를 가져왔으며, 특히 정면충돌사고, 사망사고, 야간사고에 대한 사고감소효과가 크게 나타났다. 따라서 정면충돌사고. 사망사고, 야간사고가 빈번히 발생하는 도로구간(특히 단일로나 접속로의 경우)에 대한 중앙분리대의 설치는 교통사고 감소를 위한 중요한 대책이 될 수 있다. 이러한 연구를 통해 중앙분리대 설치에 따른 사고감소효과를 명확히 밝힘으로써 중앙분리대 설치의 당위성을 제공할 수 있을 뿐 만 아니라 향후 보다 효과적이고 합리적인 중앙분리대 설치구간 선정에 도움을 줄 것으로 사료된다.