• 한국ITS학회 논문지
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• 제22권2호
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• pp.182-194
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• 2023

교통영향평가는 도시·교통 사업 시행 시에 발생할 수 있는 교통문제를 사전에 해결하는 주요한 역할을 하는 제도이지만 사업의 특성을 고려한 작성 지침과 명확한 심의 기준이 없어 심의 결과의 일관성이 떨어지는 문제점이 있다. 본 연구에서는 교통영향평가에서 심의 의결된 교통개선대책을 분석하여 심의 결과의 핵심 키워드를 찾고 교통영향평가에서 주요하게 검토해야 하는 항목을 제시하고자 한다. 이를 위해 경기도에서 심의 의결된 도시개발사업의 교통개선대책을 중심으로 TF-IDF 및 N-gram 분석을 활용한 텍스트마이닝을 하였다. 도시개발사업에 주요하게 고려되는 사항은 도로, 교차로 등 교통 기반시설의 신설이 주요한 키워드였으며 다음으로 진출입구 위치 설정, 보행 동선 연결이 주요한 사항이었다. 향후 교통영향평가 지침과 심의 기준 마련 시 본 연구에서 제시한 주요 항목을 반영함으로써, 교통영향평가의 일관성과 객관성을 높이는 심의 운영에 이용할 수 있을 것으로 기대한다.

• 해양환경안전학회지
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• 제19권2호
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• pp.119-128
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• 2013

2000년대 초반부터 연안준설 사업의 수요가 크게 증가하였고, 기타 연안개발 사업과도 중첩되어 준설토의 발생량은 지속적으로 증가하고 있다. 이로 인해 주변해역에 대한 환경 영향이 심화될 수밖에 없는 상황에서, 2011년 제출된 해역이용협의서 중 준설이 포함된 사업의 해수 및 해저 퇴적물에 대한 해양환경영향평가 현황을 파악하였다. 해양환경영향평가 항목 중 일반 항목들의 조사 비율은 대체로 높은 반면, 중금속 등 유해 물질의 경우에는 세부항목들 간 조사 비율 편차가 크게 나타났다. 한편 중금속 분석 시 협의서 작성 지침에 따른 전처리 과정(완전 분해)과 분석 방법이 제대로 수행되지 않았다. 또한 작성 지침에 명시되어 있지는 않지만, 결과값에 대해 신뢰도 확보를 위한 검증(회수율 및 검출한계 산정) 수행 현황도 매우 미흡한 것으로 파악되었다. 이로 인해 연안 준설 및 개발에 따른 주변 해양환경영향평가가 부실하게 진행되고 있는 것으로 나타났다. 향후 해양 수질 및 퇴적물 환경에 대해 보다 엄정한 평가와 진단을 위해서는 협의서 작성에 관한 세부 지침의 보완이 요구되며, 해역이용협의 제도의 개선을 통해 정확한 해양환경영향평가가 수행되도록 협의서 작성지침의 준수 의무를 강화할 필요가 있는 것으로 판단되었다.

• 한국환경보건학회지
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• 제44권3호
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• pp.217-226
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• 2018

Objectives: Despite the positive effects of Off-site risk assessment (ORA) system such as prevention of chemical accidents, some problems have been constantly raised. The purpose of this study is to analyze the problems that have occurred through the implementation of the ORA system for the past three years and to suggest reasonable directions for improvement in the future. Methods: In order to identify the problems with the methodology and procedure of ORA system, we analyzed statutes, administrative rules and documents related to the ORA system. A survey of ORA reviewers in National Institute of Chemical Safety was conducted to investigate the weight of determinants considered when judging the level of total risk in ORA. Results: In this study, we found out the uncertainty of the estimation of the number of people in the impact range in the procedure of the risk assessment of individual handling facilities, the lack of quantitative risk analysis methods for environmental receptors, and the ambiguity of the criteria for the total risk. In addition to suggesting solutions to the problems mentioned above, we also, suggested a decision tree for total risk in ORA. Conclusion: We anticipate that the solutions including the systematic decision tree for total risk suggested will contribute to the smooth operation of the ORA system.

• 한국방재학회:학술대회논문집
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• 한국방재학회 2007년도 정기총회 및 학술발표대회
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• pp.462-467
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• 2007

Recently, in Korea vehicle market, the proportion of SUV is increasing. However Korea SINCAP(Side Impact New Car Assessment Program) doesn't reflect this circumstance. This paper focused on improvement of Korea SINCAP by comparing IIHS(Insurance Institute of Highway Safety) side impact test protocol with Korea SINCAP.

• International Journal of Internet, Broadcasting and Communication
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• 제15권3호
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• pp.191-202
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• 2023

This study aims to propose a framework for evaluating the impact of artificial intelligence (AI) services, based on the concept of AI service impact. It also suggests a model for evaluating this impact and identifies relevant factors and measurement approaches for each item of the model. The study classifies the impact of AI services into five categories: ethics, safety and reliability, compliance, user rights, and environmental friendliness. It discusses these five categories from a broad perspective and provides 21 detailed factors for evaluating each category. In terms of ethics, the study introduces three additional factors-accessibility, openness, and fairness-to the ten items initially developed by KISDI. In the safety and reliability category, the study excludes factors such as dependability, policy, compliance, and awareness improvement as they can be better addressed from a technical perspective. The compliance category includes factors such as human rights protection, privacy protection, non-infringement, publicness, accountability, safety, transparency, policy compliance, and explainability.For the user rights category, the study excludes factors such as publicness, data management, policy compliance, awareness improvement, recoverability, openness, and accuracy. The environmental friendliness category encompasses diversity, publicness, dependability, transparency, awareness improvement, recoverability, and openness.This study lays the foundation for further related research and contributes to the establishment of relevant policies by establishing a model for evaluating the impact of AI services. Future research is required to assess the validity of the developed indicators and provide specific evaluation items for practical use, based on expert evaluations.

• Nuclear Engineering and Technology
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• 제54권10호
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• pp.3745-3765
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• 2022

The concrete structures related to nuclear safety are threatened by accidental impact loadings, mainly including the low-velocity drop-weight impact (e.g., spent fuel cask and assembly, etc. with the velocity less than 20 m/s) and high-speed projectile impact (e.g., steel pipe, valve, turbine bucket, etc. with the velocity higher than 20 m/s), while the existing studies are still limited in the impact resistant design of nuclear power plant (NPP), especially the primary RC slab. This paper aims to propose the numerical simulation and theoretical approaches to assist the impact-resistant design of RC slab in NPP. Firstly, the continuous surface cap (CSC) model parameters for concrete with the compressive strength of 20-70 MPa are fully calibrated and verified, and the refined numerical simulation approach is proposed. Secondly, the two-degree freedom (TDOF) model with considering the mutual effect of flexural and shear resistance of RC slab are developed. Furthermore, based on the low-velocity drop hammer tests and high-speed soft/hard projectile impact tests on RC slabs, the adopted numerical simulation and TDOF model approaches are fully validated by the flexural and punching shear damage, deflection, and impact force time-histories of RC slabs. Finally, as for the two low-velocity impact scenarios, the design procedure of RC slab based on TDOF model is validated and recommended. Meanwhile, as for the four actual high-speed impact scenarios, the impact-resistant design specification in Chinese code NB/T 20012-2019 is evaluated, the over conservation of which is found, and the proposed numerical approach is recommended. The present work could beneficially guide the impact-resistant design and safety assessment of NPPs against the accidental impact loadings.

• 한국항해항만학회지
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• 제43권5호
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• pp.310-319
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• 2019

With the recent increase in the volume of liquid cargo transportation, there is a need for STS( Ship To Ship) globally. In the case of the STS mooring, the safety assessment should be conducted according to other criteria because mooring is different from the general mooring at the quay, but there is no separate standard in Korea. Thus in this study, STS mooring simulation and sensitivity analysis using OPTIMOOR program, the numerical analysis program, was conducted to identify the characteristics of the STS mooring. The target sea modeled the Yeosu port anchorage in Korea and the target ship was selected as the case of VLCC (Very Large Crude Oil Carrier)-VLCC. Through the numerical simulation and sensitivity analysis, the characteristics of STS mooring were identified. Also based on these results, we focused on establishing the standard for STS mooring safety assessment. Numerical simulation results show that the STS mooring safety can be changed according to a ship's cargo loading condition, pre-tension of mooring line, sea depth, encounter angle with the weather, and the weather condition. Additionally, the risk matrix is prepared to establish the safe external force range in the corresponding sea area. This result can be used to understand the mooring characteristics of STS and contribute to the revision of mooring safety assessment criteria.

• Nuclear Engineering and Technology
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• 제35권2호
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• pp.108-120
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• 2003

In assessing the long term post closure radiological safety assessment of a potential HLW repository in Korea, three categories of uncertainties exist. The first one is the scenario uncertainty where series of different natural events are translated into written statements. The second one is the modeling uncertatinty where different mathematical models are applied for an identical scenario. The last one is the data uncertainty which can be expressed in terms of probabilistic density functions. In this analysis, three different scenarios are seleceted; a small well scenario, a radiolysis scenario, and a naturally discharged scenario. The MASCOT-K and the AMBER, probabilistic safety assessment codes based on connection of sub-modules and a compartment theory respectively, are applied to assess annual individual doses for a generic biosphere. Results illustrate that for a given scenario, predictions from two different codes fairly match well each other But the discrepancies for the different scenarios are significant. However, total doses are still well below the guideline of 2 mRem/yr. Detailed analyses with model and data uncertainties are underway to further assure the safety of a Korean reference dispsoal concept.

• 해양환경안전학회지
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• 제21권4호
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• pp.361-371
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• 2015

본 연구는 최근 3년간의 항만 및 어항개발사업에 따른 해역이용협의서 91건을 분석하여 그 작성실태(평가항목별 조사현황과 영향예측 등)를 파악하고, 문제점을 개선하기 위한 방안을 요약 제시하였다. 9개 평가항목 중에서 해양화학, 해양퇴적물 및 해양생태계 부분에서는 현장조사 비율이 높았으나(70 % 이상), 조사자료를 활용한 영향예측은 미흡하였다. 반면, 해양물리의 경우는 현황조사 비율은 낮았지만(조석 7.7 %, 조류 24.2 %), 영향예측 수행비율은 높아 예측결과를 뒷받침할 만한 근거와 검증 측면에서 문제점이 있었다. 즉, 조사와 예측에 대한 평가가 연관성이 낮아 신뢰성이 떨어지고 있었다. 항만 및 어항개발사업에 있어 영향예측과 밀접하게 관련되어 있는 주요 외력(조석, 조류 및 파랑 등) 및 중점평가사항에 대한 체계적인 진단이 필요하나, 현재는 사업유형을 고려하지 않는 일반적인 평가방법과 자료인용이 이루어지고 있는데, 향후 사업규모와 지역특성 등을 고려한 중점평가항목과 구체적 평가사항(조사시기, 정점선정)을 사전에 스코핑해 줄 수 있는 제도적 장치가 필요할 것이다. 또한, 현장조사자료의 신뢰성 강화를 위해 해양화학 및 해양퇴적물의 분석에 관한 정도관리체계의 적용이 강화되어야 할 것이다.

• 한국안전학회지
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• 제31권2호
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• pp.83-89
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• 2016

As the world's industrial development quickens, the highways and regional expressways have been expanding to serve the logistics and transportation needs of people. The burgeoning road construction has led to a growing interest in roadside installations. These must have reliable performance over long periods, reduced maintenance and high durability. Steel roadside barriers are prone to corrosion and other compromises to their functionality. Therefore, using high anti-corrosion steel material is now seen as a viable solution to this problem. Thus, the objective of this paper is to expand the scope of applications for high anti-corrosion steel material for roadside barriers. This paper assesses the impact safety such as structural performance, occupant protection performance and post-impact vehicular response performance by a simulation review on roadside barriers built with high strength anti-corrosion steel materials named as hot-dip zinc-aluminium-magnesium alloy-coated steel. The simulation test results for the roadside barriers built with high strength anti-corrosion steels with reduced sectional thickness meet the safety evaluation criteria, hence the proposed roadside barrier made by high strength and high anti-corrosion hot-dip zinc-aluminium-magnesium alloy-coated steel will be a good solution to serve safe impact performance as well as save maintenance cost.