환경부하평가 신뢰성 향상을 위한 교량용 포트받침 전과정목록 산정방법에 관한 연구

위대형(Wie,DaeHyung),황용우(Hwang,YongWoo) 대한토목학회 2017 대한토목학회 학술대회 Vol.2017 No.10

화학물질의 고속도로 운송경로 파악 및 사고 시 방제물품 보관 장소 선정에 관한 연구

김기란(Giran Kim),황용우(Yongwoo Hwang),이익모(Ikmo Lee),민달기(Dalki Min) 한국위험물학회 2017 한국위험물학회지 Vol.5 No.1

With the development and advancement of the chemical industry, chemical usage, importing and circulation has continued to increase. Of the accidents caused by chemical transport vehicles, 40% are occurring on highways. Chemical transportation vehicle accident that occurred on the highway are causing more damage such as water pollution, soil contamination and as well as primary damage (leaks, fires and explosion). There is the potential to develop into a disaster. Although the country has provisions for transport in various laws, the lack of systematic management and statistics relating to the transport vehicle is not even built. In this study, it was selected Yeosu area through the chemical circulation analysis. Based on the chemical transportation data, it was identify the chemical transportation route and materials(only in tank lorry vehicles). Yeosu was selected as the study subjects and three transportation routes with high transportation frequency were selected (Yeosu-Ansan, Yeosu-Incheon, Yeosu-Ulsan). Of the chemicals that start transporting in Yeosu area, they take up a lot of frequency in the order of hydrochloric acid, sulfuric acid, and toluene. Yeosu-Ansan, Yeosu-Incheon range were assumed that the accident occurred in Gyeongbu and Cheonan-Nonsan. Yeosu-Ulsan range was assumed that the accident at the Gyeongbu and Center branch since there is no overlapping range. Main resting places located in each section, it was selected as a suitable site for the emergency supplies. In case of Yeosu-Ansan and Yeosu-Incheon route, it was designated as Anseong resting place of Gyeongbu and Jungan resting place of Cheonan-Nonsan . In the case of Yeosu-Ulsan route, it was designated as a Yangsan rest stop (ascending) located on Gyeongbu Expressway.

화학소재산업의 증기운 폭발사고 사례분석을 통한 안전성 확보방안 연구

김규환(Kyu-Hwan Kim),이익모(Ikmo Lee),황용우(Yongwoo Hwang),천영우(Youngwoo Chon) 한국위험물학회 2017 한국위험물학회지 Vol.5 No.1

Petrochemical complex has developed rapidly with a high degree of industrialization of chemicals since 1960s. Production and use of chemical increased dramatically. These various damage caused by accidents by fire, explosion and leaks behind the chemicals is constantly increasing. Implementation of PSM from 1996 to get a safety in efforts, but accidents with enormous damage to the environment and human have occurred constantly. The explosion accident of them cause fatal accidents and serveral victims. In this study, the causes of accidents and accident prevention measures were to investigate the incident in accordance with the type of explosive type. Depending on the type of explosive was investigated in the form of increased vapor cloud explosion of a runaway reaction to, and analyzed the differences between domestic and international accident prevention measures. On the other hand, if domestic measures for the cause of the accident was that most, if foreign cases were matched for similar types of analysis come, predicting an accident scenarios were compared to a similar case. In addition, by configuring the accident prevention plans, incident response planning, disaster recovery planning, such as by presenting the safety information for each situation was constructed to ensure the safety of chemicals used in the workplace.

Decision Tree 작성에 의한 화학사고의 통합 해석에 관한 연구

방미진(Mijin Bang),천영우(Youngwoo Chon),황용우(Yongwoo Hwang),이익모(Ikmo Lee) 한국위험물학회 2017 한국위험물학회지 Vol.5 No.1

The chemical accidents has been increased with the use of chemicals, and therefore evaluating the accidents is significant. Current studies on chemical accidents seem to have limits on sort of chemicals, or they seem to have shortage of researches, such as prediction on diffusion of chemicals and extent of damage, after setting up the accident scenarios. In this study, we choose top 10 substances, which caused the chemical accidents frequently, through actual cases that occurred in South Korea at the last 10 years(2006~2015). We use ‘decision trees’ to help people to understand the types of accidents and the damage characteristics of materials easier. In addition, we classified the human damage of 68 cases into three classes, which are small, medium, and large, according to the extent of human damage. We propose the procedure of disaster responses, including contents of "decision trees, on the most frequent accidents, leakage.

물질특성 및 운전조건을 고려한 증기상 물질의 2차 누출에 따른 폭발위험장소 범위 선정에 관한 연구

서민수(Minsu Seo),김기석(Kisug Kim),황용우(Yongwoo Hwang),천영우(Youngwoo Chon) 한국가스학회 2018 한국가스학회지 Vol.22 No.4

현재 KS Code 등 국내규정에서는 폭발위험장소의 범위를 계산하는 방법이 명확하게 나타나지 않아, 정확한 범위 선정을 위해서는 확산 모델링 해석을 이용하여야 한다. 본 연구애서는 대표적인 물질과 운전조건을 활용하여 확산 모델링에 비하여 간편하면서도 비교적 합리적인 폭발위험장소의 범위를 산정하는 방법을 제시하고자 하였다. 현재 시행되고 있는 국내외 표준을 바탕으로 폭발하한계(LFL, Lower Flammable Limit)까지 거리에 영향을 미치는 변수를 선정하였다. 총 16종의 인화성물질을 대상으로 물질변수, 운전변수, 기상조건에 대하여 모델링을 진행하였으며, 통계분석을 통해 영향을 미치는 변수를 선별하였다. 선별된 변수를 이용하여 폭발위험장소의 범위 선정을 위한 3단계 분류화 방법(3Step Classification Method)을 작성하였다. Currently, local regulations, such as KS Code, do not clearly specify how to calculate the range of hazardous area, so the dispersion modeling program should be used to select dispersion. The purpose of this study is to present a methodology of determining the range of hazardous area which is simpler and more reasonable than modelling by using representative materials and process conditions. Based on domestic and overseas regulations that are currently in effect, variables affecting distance to LFL(Lower Flammable Limit) were selected. A total of 16 flammable substances were modelled for substance variables, process conditions variables, and weather conditions variables, and the statistical analysis selected the variables that affect them. Using the selected variables, a three-step classification method was prepared to select the range of locations subject to explosion hazard.

석유화학산업의 벤젠 비산배출 저감을 위한 MACT 적용효과

김훈장(HunJang Kim),문진영(Jinyoung Moon),황용우(Yongwoo Hwang),곽인호(Inho Kwak) 대한환경공학회 2016 대한환경공학회지 Vol.38 No.8

본 연구는 석유화학산업 시설에 MACT (Maximum Achievable Control Technology) 적용 시 벤젠 비산배출량 저감 효과를 분석 하였다. 국내에서는 2015년부터 대기환경보전법에 따라 벤젠 비산배출 저감 위한 규제를 시행하였으나, 미국 EPA에서는 이에 앞서 1995년부터 최대달성 가능한 통제기술인 MACT 기준을 적용하여 벤젠 비산 배출을 효과적으로 관리하고 있다. 본 연구를 위하여 벤젠 배출량 산정 방법론은 EPA Emission Factor AP-42 및 EPA MACT Standard Guideline를 활용하였다. 연구 결과 MACT 적용할 경우 Uncontrolled facility에 비하여 벤젠 배출량이 평균 98% 수준으로 저감 가능한 것으로 나타난 반면 National Regulation 경우 MACT 수준에 비하여 다소 낮은 평균 95% 수준의 저감율을 보이는 것으로 분석되었다. 그러나 MACT 기준 경우 벤젠 선박출하 시 유증기 회수설비(Vapor Recovery Unit, VRU) 등을 가동하여 배출 저감토록 요구하고 있음에도 불구하고 National regulation에서는 별도 규제 사항이 없는 실정이다. 추가적인 배출저감 달성을 위해서는 벤젠 선박출하 시 VRU 등 유증기 저감설비 도입의 법제화가 필요하다. 이러한 노력은 국내 석유화학산업의 벤젠 배출관리능력을 Global 수준으로 향상시키는데 기여할 것으로 기대된다. In this study, MACT (Maximum Achievable Control Technology) application effect was evaluated for minimization of benzene fugitive emission in petrochemical industry. Although fugitive emission for benzene in the nation was regulated by the Clean Air Conservation Act from 2015, the US EPA already has introduced MACT standard to minimize its emission with up-todate technology since 1995. EPA Emission Factor (AP-42) and EPA MACT Standard Guideline were used to assess MACT application effect. As a result, For MACT application it could reduce benzene emission up to 98% (average) comparing with uncontrolled facility, while the national regulation could achieve about 95% (average) reduction which is slightly lower than MACT. However there is no control measure in the national regulation to reduce benzene emission for vessel loading even though MACT standard requires preventive facility such as VRU (Vapor Recovery Unit). For further reduction of benzene emission, it needs to be mandatory for operation of VRU when benzene product is loaded in vessel. These efforts could contribute to achieve the global level for benzene emission management in national petrochemical industry.

컨테이너 하역 작업자의 유해화학물질 노출 위험도 분석

고광훈(Kwanghoon Ko),서영민(Youngmin Seo),천영우(Yongwoo Hwang),이익모(Ikmo Lee),황용우(Yongwoo Hwang) 한국위험물학회 2020 한국위험물학회지 Vol.8 No.1

Containers usually are used as the general oversea transportation facilities in global. The fumigation materials such as Methyl bromides and formaldehyde, which would be known to be toxic to human or anima beings, commonly are used to remove harmful insect inner containers. Also, workers in unloading container would be easily exposed to toxic materials at working sites and have been reported to occur the safety accidents which would cause many health and damages of workers. In this study, the experimental analysis would be conducted for container unloading workers" exposure risk to hazardous chemical materials based on the international standard, and the kinds and emitted concentrations of hazardous materials would be analyzed and judged occupational exposed risk for electronics products. The results of this study showed that the fumigation materials would be found for all containers. In some containers, it was showed that formaldehyde was found and over occupational exposure limits(OELs) and showed to be found toluene in low level under OELs. But, the inner containers" formaldehyde and toluene detected in tube test would be founded under OELs in precision analysis, and then worker"s exposure risk showed that it could be very lower. In case of products and packing materials, the concentration of formaldehyde and VOCs(Bezene, Toluene) could be under OELs, and then the worker"s exposure risk showed it could be lower. In the future, it should be set up management procedure to prevent worker in handling containers of domestic, and it will be applicable to analyze worker exposure risk for another industrial products. except of electronics.

KORA 프로그램을 이용한 N-메틸피를리디논 누출에 따른 피해영향범위 분석에 관한 연구

김동욱(DongUk Kim),천영우(YoungWoo Chon),황용우(YongWoo Hwang) 한국가스학회 2016 한국가스학회 학술대회논문집 Vol.2016 No.11

AHP기법을 이용한 천연가스 발전소의 최적가용기술의 중요도 선정

김동욱 ( Donguk Kim ),권순길 ( Soongil Kwon ),황용우 ( Yongwoo Hwang ),김영운 ( Youngwoon Kim ) 한국전과정평가학회 2020 한국전과정평가학회지 Vol.21 No.1

최근 국내에서 환경오염시설의 통합관리에 관한 법률이 시행되었다. 통합관리에 따라 사업장의 환경인허가는 2017년 시행된 통합법에 따라 사업장 환경관리수준평가를 통하여 인허가 기간을 5∼8년까지 갱신하게 된다. 이 과정에서 최적가용기법의 적용률을 평가하게 되는데, 높은 평가점수를 받기 위해서 반드시 필요한 부분이다. 하지만 최적가용기법을 평가하는데 있어 사업장의 상황을 고려하지 않는 문제점이 있다. 적용 가능한 최적가용기법을 국내 기준서와 EU 기준서를 조사하여 사업장의 상황에 맞게 전문가들을 대상으로 AHP분석을 실시하여 우선적으로 적용할 기법을 선정하여 우선순위를 마련하였다. Recently, the Act on the Integrated Management of Environmental Pollution Facilities was implemented in Korea. Under the integrated management, the license period of the workplace will be renewed by five to eight years through the assessment of the level of environmental management of the workplace in accordance with the integrated law implemented in 2017. In this process, the application rate of the optimal use technique is evaluated, which is essential to obtain a high evaluation score. However, there is a problem in assessing optimal use techniques without considering the situation at the workplace. An AHP analysis was conducted on experts according to the situation of the workplace by examining the applicable optimal use techniques and the EU standards, and the priority was prepared by selecting the techniques to be applied first.

기업의 지속가능성 평가 대응을 위한 전자제품의 환경성 간이 평가 기법 개발

고광훈 ( Kwanghoon Ko ),안상혁 ( Sanghyuk Ahn ),이상용 ( Sangyong Lee ),김병주 ( Byungju Kim ),황용우 ( Yongwoo Hwang ) 한국전과정평가학회 2019 한국전과정평가학회지 Vol.20 No.1

Recently, the Sustainability Index such as DJSI(Dow Jones Sustainability Index) become more global trend for many electronic companies. In this study, we developed simplified environment assessment tool called by simplified LCA (SLCA) on electronic products and LCI Database in life cycle. Firstly, the environmental assessment categories were found for DJSI requirements such as global warming, mineral depletion, eco toxic, human toxic etc. Also, material database and parts database of life cycle inventory were developed for life cycle assessment. The stage of manufacturing, transportation, usage and disposal were developed for life cycle database. Finally, the SLCA tool was developed logically for environmental assessment based on excel program, in which the informations input on material selection, part weight and usage scenario, etc. The result of environmental assessment at the life cycle could be founded in using this tool. The meaning of this study have better effects of reducing load of evaluation and working time.