• 대한안전경영과학회지
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• 제14권1호
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• pp.1-6
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• 2012

A number of Brain-Computer Interface (BCI) studies have been performed to assess the cognitive status through EEG signal. However, there are a few studies trying to prevent user from unexpected safety-accident in BCI study. The EEGs were collected from 19 subjects who participated in two experiments (rest & event-related potential measurement). There was significant difference in EEG changes of both spontaneous and event-related potential. Beta power and P300 latency may be useful as a biomarker for prevention of response to safety-accident.

• Nuclear Engineering and Technology
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• 제49권2호
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• pp.306-312
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• 2017

The purpose of this research is to introduce the technical standard of accident sequence precursor (ASP) analysis, and to propose a case study using the dynamic-probabilistic safety assessment (D-PSA) approach. The D-PSA approach can aid in the determination of high-risk/low-frequency accident scenarios from all potential scenarios. It can also be used to investigate the dynamic interaction between the physical state and the actions of the operator in an accident situation for risk quantification. This approach lends significant potential for safety analysis. Furthermore, the D-PSA approach provides a more realistic risk assessment by minimizing assumptions used in the conventional PSA model so-called the static-PSA model, which are relatively static in comparison. We performed risk quantification of a steam generator tube rupture (SGTR) accident using the dynamic event tree (DET) methodology, which is the most widely used methodology in D-PSA. The risk quantification results of D-PSA and S-PSA are compared and evaluated. Suggestions and recommendations for using D-PSA are described in order to provide a technical perspective.

• 자동차안전학회지
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• 제15권2호
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• pp.35-41
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• 2023

On December 19, 2015, as Article 29-3 (Installation of Accident Recording Devices and Provision of Information) of Motor Vehicle Management Act came into force, In Korea, the EDR (Event Data Recorder) reports are often used for the analysis of various traffic accident cases such as multiple collisions, traffic insurance crimes, and sudden unintended acceleration (SUA), and the others. So many investigators have analyzed the driver's behavior and vehicle situation by comparing the time zero in the EDR report to the actual crash time in dash-cam (or CCTV). Time zero (T0) is defined as the reference time for the record interval or time interval when recording an accident in Article 56-2, Enforcement rule of Performance and Standard for Automobile and Automotive parts. Also in the EDR report, time zero (T0) is defined as whichever of the following occurs first; 1. "wake-up" by an air-bag control system, 2. Continuously running algorithms (by monitoring of longitudinal or lateral delta-V), 3. Deployment of a non-reversible deployment restraint. We have already proposed the "Flowchart & Checklist" to adopt the EDR report for traffic accident investigation and the necessity of specialized institutions or courses to systematically educate or analyze the EDR data. Therefore, in this paper, we report to traffic accident investigators notable points and analysis methods based on some real-world traffic accidents that can be misjudged in specifying time zero (T0).

• 한국항공운항학회:학술대회논문집
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• 한국항공운항학회 2016년도 춘계학술대회
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• pp.95-98
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• 2016

It is true that Aircraft accident investigation organization of Republic of Korea does not have independent role structurally and administratively. Also, in the event of an aviation accident it does not take the appropriate response and post-institutional measures for victims and their families support. With aware of this fact and to improvement this research paper present approach direction and suggestion of issues and implications for those by researching the operational practices of the United State's Victim Family support.

• 한국인터넷방송통신학회논문지
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• 제14권5호
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• pp.179-187
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• 2014

사고기록장치는 사고 전 후의 차량의 상태 및 운동 정보를 기록하는 장치로 객관적인 사고분석과 실사고 데이터를 이용한 자동차 안전장비의 개발을 위해 교통사고 조사기관과 부품개발사에서 많은 관심을 보이고 있다. 본 연구는 사고기록장치의 출력데이터를 이용한 교통사고재현을 통해 객관적, 과학적 사고분석에 목적을 두고, 더블레인 체인지 테스트 6회 슬라롬 테스트 1회의 실차 주행시험 및 시뮬레이션을 진행하였다. 실차시험을 통하여 취득한 차량의 속도, 종 횡방향 가속도, 조향각, 주행경로 등의 정보를 이용하여 교통사고 재현 및 분석 프로그램인 PC-Crash로 시뮬레이션을 진행하였다. 시뮬레이션은 가속도-조향각 입력방법과 가속도-주행경로 입력방법으로 2회 진행하였으며, 실차시험 결과와 2가지 시뮬레이션의 결과를 비교하여 최적의 경로 재현성을 갖는 분석방법을 도출하였다.

• 한국안전학회지
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• 제31권5호
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• pp.177-186
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• 2016

When an event is occurred in a nuclear power plant (NPP), the NPP operator reports it referred by the regulation on reporting and public announcement of accidents and incidents. Some of the events do not need to be reported because they are not included in the reporting criteria of the regulation. However, it is necessary that they should be managed effectively because the accident can be occurred by the recurrence of a lot of them as precursors. Among the events not included in the reporting criteria of the regulation, near miss is the event that is not occurred but can generate a significant consequence. This can provide the cause of the event which does not result an accident. So, it is able to offer insightful knowledges to prevent higher level events about the function and process of NPP. The objective of this study is to analyze the issues of near miss events, prepare the defence against the risk, and improve the management process of NPP. To achieve it, this study performed to analyze the management structure and status of near miss events as well as the accident reporting system of the domestic and foreign regulation bodies. In case of Korea, the status was analyzed by quantitative data, licensee event reports and procedures. Based on these, we could find the causes that near miss events were not managed effectively. Then, systematic alternatives that reflected the perspective of man, technology and organization were drawn.

• 한국항해항만학회지
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• 제40권6호
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• pp.391-400
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• 2016

최근 우리나라 연근해에서 발생한 몇 건의 대형 해양사고에서, 신속하고 체계적인 초기대응이 사고 전개양상과 사고결과에 얼마나 큰 영향을 미치는지를 확인하였다. 또한, 이를 통해 다양한 해양사고 상황에 대한 정확한 정보와 전개될 수 있는 시나리오, 적용 가능한 사고대응 방법들에 대한 정보를 신속하게 확보하는 것이 해양사고 초기대응을 위하여 무엇보다 중요함을 알 수 있었다. 이러한 현실적인 문제를 해결하기 위한 일환으로, 본 연구에서는, '위험도기반 초기대응 지원 시스템'의 개념을 제시하고, 해양사고 이후 전개 가능한 모든 시나리오와 적용 가능한 사고대응 방법들을 식별하기 위하여 사건전개 시나리오 식별 브레인스토밍 기법을 제안하였으며, 식별된 사고대응 방법들의 적용으로 인한 피해저감 효과 등을 정량화하기 위하여 사건수목분석 (Event Tree Analysis: ETA) 기법을 활용한 사건전개수목을 제안하였다. 그리고 각각의 사고대응 방법에 대한 상세분석을 위해서는 PERT/CPM의 사용을 제안하였다. 또한, 상기 제시한 위험도기반 초기대응 지원시스템의 구성 체계를 설명하기 위하여, 유조선 좌초사고에 대한 사고대응 작업을 예로 간략한 위험도분석 작업을 수행하였다.

• International journal of advanced smart convergence
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• 제8권4호
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• pp.161-168
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• 2019

Traffic accidents in tunnel can lead to large traffic accidents due to narrow and dark road characteristics. Therefore, special care of the driver is required when is driving in a tunnel. However, accidents can happen at any time. In the event of an accident, a narrow road structure may lead to a second accident. Therefore, all facilities installed inside the tunnel should be allowed to minimize damage in the event of an accident. We confirmed the safety of the collision target through the action of the sedan, Sport Utility Vehicle (SUV) and truck when the vehicle crashed into a stairway installed on the tunnel emergency escape route, and when a concrete barrier or guard rail was installed in front of the stairway. The behavior of the vehicle has resulted in a total of three results: rollover or rollover, change of speed and angle of the vehicle after collision. The sedan and SUV were the most secure when colliding with the guardrail, but considering the truck as a whole, concrete barriers were judged to be the most suitable for minimizing damage from the first accident and reducing the risk of the second accident.

• Nuclear Engineering and Technology
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• 제44권3호
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• pp.311-322
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• 2012

Since the crisis at the Fukushima plants, severe accident progression during a station blackout accident in nuclear power plants is recognized as a very important area for accident management and emergency planning. The purpose of this study is to investigate the comparative characteristics of anticipated severe accident progression among the three typical types of nuclear reactors. A station blackout scenario, where all off-site power is lost and the diesel generators fail, is simulated as an initiating event of a severe accident sequence. In this study a comparative analysis was performed for typical pressurized water reactor (PWR), boiling water reactor (BWR), and pressurized heavy water reactor (PHWR). The study includes the summarization of design differences that would impact severe accident progressions, thermal hydraulic/severe accident phenomenological analysis during a station blackout initiated-severe accident; and an investigation of the core damage process, both within the reactor vessel before it fails and in the containment afterwards, and the resultant impact on the containment.

• 대한토목학회논문집
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• 제31권5D호
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• pp.727-737
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• 2011

본 연구에서는 효율적인 철도사고관리 및 복구작업을 위한 임시복구 시나리오를 개발하였다. 문헌조사 및 전문가 설문조사 결과를 통하여 임시복구 Worst Case 선정시기준이 되는 고려항목과 임시복구 시나리오 수립에 필요한 중요항목(event)을 도출하였으며, 임시복구가 가장 힘든 Worst Case로는 터널구간에서 발생하는 철도사고가 선정되었다. 이는 신속한 임시복구를 위해 좁은 공간에서 체계적이고 효율적인 복구절차를 갖추고 숙련된 복구요원 양성이 필요한 것으로 분석되었다. 또한, 본 연구에서는 통계학적 분석기법을 이용하여 임시복구 시나리오 수립 시 중요항목(event)간 중요도(우선순위)를 선정한 결과 임시복구유형중 시설물 붕괴를 가장 우선적으로 복구하고 선로매몰, 차량탈선 순으로 처리함이 복구시간을 단축할 수 있는 것으로 분석되었다. 이는 복구에 많은 시간이 소요되는 순으로 임시복구가 이루어져야 함을 나타낸다. 임시복구 시나리오는 임시복구 Worst Case, 임시복구유형별 중요항목(event)을 종합하여 표준운영절차(안) 11개를 제안하였다. 이를 활용하여 철도사고 DB관리 및 신속한 사고복구를 통해 정시성을 확보하여 열차지연시간을 최소화하는데 크게 기여할 것이다.