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한국안전학회> 한국안전학회지(구 산업안전학회지)> 주택 내 수소연료전지 전용실의 폭발 위험성에 대한 실험적 연구

KCI등재

주택 내 수소연료전지 전용실의 폭발 위험성에 대한 실험적 연구

An Experimental Study on the Explosion Hazards in the Fuel Cell Room of Residential House

박병직 ( Byoungjik Park ) , 김양균 ( Yangkyun Kim ) , 황인주 ( Inju Hwang )
  • : 한국안전학회
  • : 한국안전학회지(구 산업안전학회지) 36권4호
  • : 연속간행물
  • : 2021년 08월
  • : 71-79(9pages)
한국안전학회지(구 산업안전학회지)

DOI


목차

1. 서 론
2. 본 론
3. 결론 및 고찰
References

키워드 보기


초록 보기

In this study, a real-scale fuel-cell room of volume 1.36 m3 is constructed to confirm the explosion characteristics of hydrogen-air mixture gas in a hydrogen-powered house. A volume concentration of 40% is applied in the fuel-cell room as the worst-case scenario to examine the most severe accident possible, and two types of doors (made of plastic sheet and wood) are fabricated to observe their effects on the overpressure and impulse. The peak overpressure and impulse based on distance from the ignition source are experimentally observed and assessed. The maximum and minimum overpressures with a plastic-sheet door are about 20 and 6.7 kPa and those with a wooden door are about 46 and 13 kPa at distances of 1 and 5 m from the ignition source, respectively. The ranges of impulses for distances of 1-5 m from the ignition source are about 82-28 Pa·s with a plastic-sheet door and 101-28 Pa·s with a wooden door. The amount of damage to people, buildings, and property due to the peak overpressure and impulse is presented to determine the safe distance; accordingly, the safe distance to prevent harm to humans is about 5 m based on the ‘injuries’ class, but the structural damage was not serious.

UCI(KEPA)

간행물정보

  • : 공학분야  > 기타(공학)
  • : KCI등재
  • :
  • : 격월
  • : 1738-3803
  • : 2383-9953
  • : 학술지
  • : 연속간행물
  • : 1986-2021
  • : 2968


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36권4호(2021년 08월) 수록논문
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KCI등재

1배관 체계 자율 복구 알고리즘 비교, 분석 및 고찰

저자 : 양대원 ( Dae Won Yang ) , 이정훈 ( Jeung-hoon Lee ) , 신윤호 ( Yun-ho Shin )

발행기관 : 한국안전학회 간행물 : 한국안전학회지(구 산업안전학회지) 36권 4호 발행 연도 : 2021 페이지 : pp. 1-11 (11 pages)

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Piping systems comprising pumps and valves are essential in the power plant, oil, and defense industry. Their purpose includes a stable supply of the working fluid or ensuring the target system's safe operation. However, piping system accidents due to leakage of toxic substances, explosions, and natural disasters are prevalent In addition, with the limited maintenance personnel, it becomes difficult to detect, isolate, and reconfigure the damage of the piping system and recover the unaffected area. An autonomous recovery piping system can play a vital role under such circumstances. The autonomous recovery algorithms for the piping system can be divided into low-pressure control algorithms, hydraulic resistance control algorithms, and flow inventory control algorithms. All three methods include autonomous opening/closing logic to isolate damaged areas and recovery the unaffected area of piping systems. However, because each algorithm has its strength and weakness, appropriate application considering the overall design, vital components, and operating conditions is crucial. In this regard, preliminary research on algorithm's working principle, its design procedures, and expected damage scenarios should be accomplished. This study examines the characteristics of algorithms, the design procedure, and working logic. Advantages and disadvantages are also analyzed through simulation results for a simplified piping system.

KCI등재

2FTA를 이용한 볼트 유도가열시스템의 고장 및 전기화재 분석

저자 : 김두현 ( Doo-hyun Kim ) , 김성철 ( Sung-chul Kim ) , 엄한얼 ( Haneol Eom ) , 강문수 ( Moon-soo Kang ) , 정천기 ( Cheon-kee Jeong )

발행기관 : 한국안전학회 간행물 : 한국안전학회지(구 산업안전학회지) 36권 4호 발행 연도 : 2021 페이지 : pp. 12-19 (8 pages)

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This paper presents a safety assessment method for FTA-based induction heating systems; the failures and causes of electrical fire are first analyzed for each part and module qualitatively, and methods to manage high probabilities of failure and electrical fire are considered, thereby improving the reliability of the induction heating system. The cumulative importance value (ACC) of the minimal cut set is drawn by setting failure as the top event, and STACK and SMPS are observed to account for about 70% of the induction heating system failures. Thus, intensively managing the basic events contained in the minimal cut set of failures for STACK and SMPS is expected to provide effective and stable operation of the induction heating system. When electrical fire is set as the top event, the STACK percentage is 90%. Accordingly, the current IGBT is changed to a FET to increase the applied voltage and prevent induction heating system failure, and a heat sink plane is installed to prevent FET heating caused by switching, thereby preventing an electrical fire. By classifying the parts and modules of the induction heating system in detail and by applying FTA based on actual failure rates and relevant data, more practical and reasonable results may be expected. Hence, continuous research must be conducted to ensure safety when using induction heating systems.

KCI등재

3발전기의 전자기장 분포 특성에 따른 작업자 노출공간 분석

저자 : 성민영 ( Minyoung Seong ) , 김두현 ( Doo-hyun Kim ) , 김승태 ( Seungtae Kim )

발행기관 : 한국안전학회 간행물 : 한국안전학회지(구 산업안전학회지) 36권 4호 발행 연도 : 2021 페이지 : pp. 20-28 (9 pages)

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With an increase in the commercialization of electricity, and the development of advanced and large electric devices and various wireless radio wave services, concerns over the effects of electromagnetic fields on human health have increased. Accordingly, the World Health Organization encouraged the development of international standards by establishing the 'International Electromagnetic Fields Project' in 1996 based on studies on the harmful effects of electromagnetic fields on the human body. Moreover, the National Institute of Environmental Health Sciences (NIEHS) classified electromagnetic fields as possible carcinogens under Group 2B category, even though they have been found to have a weak correlation with those effects on human health. Mid-to-large-sized electric facilities used at industrial sites mostly adopt a commercial frequency of 60 ㎐, and workers handling these facilities are exposed to such extremely low frequency (ELF) fields for a long time. A previous study suggested that exposure to ELF electromagnetic fields with frequency ranges from 0 to 300 ㎐, even for a short time, at densities higher than 100 μT may have harmful effects on human body as it affects the activation of nerve cells in the central nervous system by inducing an electric field and current and stimulating muscles and the nervous system in the body. Such studies, however, focused on home appliances used by ordinary people, and research on facilities utilizing high-capacity current and operated by workers at industrial sites is lacking. Therefore, in this study, a 3000 kilowatt generator, which is a high-capacity electric facility employed at industrial sites, was investigated, and the size of the magnetic fields generated during its no-load and high-load operations per distance to produce a map was measured to reveal spots deemed hazardous according to domestic and international exposure standards. The findings of this study is expected to alleviate workers' anxiety about the harmful effects of magnetic fields on their body and to minimize the level of exposure during operations.

KCI등재

4재사용 시스템비계와 시스템동바리 수직재의 허용강도 분석

저자 : 박진석 ( Jin-suk Park ) , 고상섬 ( Sang Seom Ko ) , 원정훈 ( Jeong-hun Won )

발행기관 : 한국안전학회 간행물 : 한국안전학회지(구 산업안전학회지) 36권 4호 발행 연도 : 2021 페이지 : pp. 29-36 (8 pages)

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The allowable strength based on experiments and the design allowable strength calculated using the design criteria were compared, which suggested a ratio between the allowable strengths for the reused vertical members of the system scaffolding and system support. By investigating a total of 421 certification reports for reused vertical members, the experimental allowable strengths were collected. Using design criteria such as the road bridge design and KDS 14 30 10, the design allowable strengths were calculated for various slenderness ratios. For the system scaffolding, the average ratio between the experimental and design allowable strengths was calculated to be 0.880 by assuming a normal distribution for all specimens. However, by analyzing the strength ratio according to the slenderness ratio, the lowest average strength ratio was found to be at least 0.844. Therefore, it is reasonable to assume that the allowable strength of the reused vertical members was 80-84% of the design allowable strength. In addition, assuming the allowable strength to be 85% of the design allowable strength is a possible method for reused vertical members of system supports.

KCI등재

5건설기술진흥법과 산업안전보건법 비교분석을 통한 건설업 안전관리 및 계획의 개선방안

저자 : 김시억 ( Si Ouk Kim ) , 윤영근 ( Young Geun Yoon ) , 오태근 ( Tae Keun Oh )

발행기관 : 한국안전학회 간행물 : 한국안전학회지(구 산업안전학회지) 36권 4호 발행 연도 : 2021 페이지 : pp. 37-46 (10 pages)

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According to the Korean Statistical Information Service, the number of fatal occupational accidents per 100,000 workers is the highest in Korea, among all the OECD countries. The safety of construction workers is managed by the construction technology promotion act (CTPA) and the occupational safety and health act (OHSA). A review of the current safety management laws is required to improve them for the construction industry, where the numbers of accidents and deaths are constantly increasing. Accordingly, the aim of this study was to identify the problems in unclear business areas through comparison and analysis of the CTPA and OHSA guidelines and establish effective site-dependent construction safety management plans. The overlapping safety and health management terms and tasks of organizations were derived along with identifying the overlapping items of the safety management and hazard and risk prevention plans. Based on these results, several improvements for the design stage, safety cost, and safety education have been suggested in this paper. In addition, an improved model based on the integration and an optimized compromise between these two laws for safety management in areas where many accidents have occurred in recent years has been reported here.

KCI등재

6국가별 건설업 사고사망만인율 산출방식 차이에 대한 비교

저자 : 정재민 ( Jae Min Jeong ) , 이채현 ( Chae Hyun Lee ) , 심유경 ( Yu Kyung Sim ) , 정재욱 ( Jae Wook Jeong ) , 이재현 ( Jae Hyun Lee )

발행기관 : 한국안전학회 간행물 : 한국안전학회지(구 산업안전학회지) 36권 4호 발행 연도 : 2021 페이지 : pp. 47-53 (7 pages)

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The fatality rate is used to estimate each country's risk level. However, the fatality rate is calculated using the number of fatal accidents and workers, which is collected differently across countries. It is therefore problematic to use these numbers in an equivalent way. This study proposes a new approach for calculating the number of full-time equivalent workers when evaluating individual countries' fatality rate by suggesting an equivalent condition for the calculation of the number of full-time equivalent workers. This study proceeds in three steps: (i) analysis of the fatality rate among various countries; (ii) fatality rate calculation using the full-time equivalent workers; and (iii) comparison of the fatality rate among various countries. The study found that for the fatality rate based on national data, the fatality rate in South Korea (1.72‱) is 10 times higher than that in United Kingdom (0.17‱). However, according to the number of full-time equivalent workers, the fatality rate in South Korea (1.86‱) was three times higher than that in the United Kingdom (0.56‱). These findings reveal a difference in the fatality rate depending on the method used to calculate the number of full-time equivalent workers. Therefore, the number of full-time equivalent workers must be calculated for each country to accurately compare the fatality rate. Ultimately, the study's results highlight the need for clearer standards in the assessment of the fatality rate by country in international organizations such as the ILO.

KCI등재

7스마트 건설안전기술 도입으로 인한 안전관리자의 역할 스트레스 영향 요인에 관한 연구

저자 : 소한섭 ( Hansub So ) , 설문수 ( Mun-su Seol ) , 맹인영 ( Inyoung Maeng ) , 박교식 ( Kyoshik Park ) , 박종근 ( Jongkeun Park )

발행기관 : 한국안전학회 간행물 : 한국안전학회지(구 산업안전학회지) 36권 4호 발행 연도 : 2021 페이지 : pp. 54-61 (8 pages)

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The purpose of this paper is to verify if safety managers must bear stress from additional tasks whenmanaging smart safety technology applications on construction sites. We conducted a survey of 133 safety managers who had experienced managing both safety management and smart safety technology applications at construction sites, and used the SPSS Statistics 25 and AMOS 22 programs to analyze the survey's logicality and the data that we collected. We found that the work burden caused by assuming additional tasks to manage smart safety technology applications affected the stress that safety managers experience when working at construction sites. The stress caused by an increased work burden led construction site safety managers to feel dissatisfied with their jobs. This finding indicates that both on the original job and on additional tasks are entirely mediated. Based on this finding, I suggest that the South Korean government should establish smart safety technology applications, thus reducing the work burden and increasing the job satisfaction for construction site safety managers.

KCI등재

8AcciMap, STAMP, FRAM을 이용한 반응기 세척 작업 중 화재 사고 분석

저자 : 서동현 ( Dong-hyun Seo ) , 배계완 ( Bae Gye Wan ) , 최이락 ( Yi-rac Choi ) , 한우섭 ( Ou-sup Han )

발행기관 : 한국안전학회 간행물 : 한국안전학회지(구 산업안전학회지) 36권 4호 발행 연도 : 2021 페이지 : pp. 62-70 (9 pages)

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Representative systematic accident analysis methods proposed so far include AcciMap, STAMP, and FRAM. This study used these three techniques to analyze a fire accident case that occurred during routine manufacturing work in a domestic chemical plant and compared the results. The methods used different approaches to identify the cause of the accident, but they all highlighted similar causal factors. In addition to technical issues, the three accident analysis methods identified factors related to safety education, risk assessment, and the operation of the process safety management system, as well as management philosophy and company culture as problems. The AcciMap and STAMP models play complementary roles because they use hierarchical structures, while FRAM is more effective in analyses centered on human and organizational functions than in technical analyses.

KCI등재

9주택 내 수소연료전지 전용실의 폭발 위험성에 대한 실험적 연구

저자 : 박병직 ( Byoungjik Park ) , 김양균 ( Yangkyun Kim ) , 황인주 ( Inju Hwang )

발행기관 : 한국안전학회 간행물 : 한국안전학회지(구 산업안전학회지) 36권 4호 발행 연도 : 2021 페이지 : pp. 71-79 (9 pages)

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초록보기

In this study, a real-scale fuel-cell room of volume 1.36 m3 is constructed to confirm the explosion characteristics of hydrogen-air mixture gas in a hydrogen-powered house. A volume concentration of 40% is applied in the fuel-cell room as the worst-case scenario to examine the most severe accident possible, and two types of doors (made of plastic sheet and wood) are fabricated to observe their effects on the overpressure and impulse. The peak overpressure and impulse based on distance from the ignition source are experimentally observed and assessed. The maximum and minimum overpressures with a plastic-sheet door are about 20 and 6.7 kPa and those with a wooden door are about 46 and 13 kPa at distances of 1 and 5 m from the ignition source, respectively. The ranges of impulses for distances of 1-5 m from the ignition source are about 82-28 Pa·s with a plastic-sheet door and 101-28 Pa·s with a wooden door. The amount of damage to people, buildings, and property due to the peak overpressure and impulse is presented to determine the safe distance; accordingly, the safe distance to prevent harm to humans is about 5 m based on the 'injuries' class, but the structural damage was not serious.

KCI등재

10산업재해통계기반 Risk 산정에 관한 연구

저자 : 우종권 ( Jong-gwon Woo ) , 이미정 ( Mi-jeong Lee ) , 설문수 ( Mun-su Seol ) , 백종배 ( Jong-bae Baek )

발행기관 : 한국안전학회 간행물 : 한국안전학회지(구 산업안전학회지) 36권 4호 발행 연도 : 2021 페이지 : pp. 80-87 (8 pages)

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Risk assessment techniques are processes used to evaluate hazardous risk factors in construction sites, facilities, raw materials, machinery, and equipment, and to estimate the size of risk that could lead to injury or disease, and establish countermeasures. The most important thing in assessing risk is calculating the size of the risk. If the size of the risk cannot be calculated objectively and quantitatively, all members who participated in the evaluation would passively engage in establishing and implementing appropriate measures. Therefore, this study focused on predicting accidents that are expected to occur in the future based on past occupational accident statistics, and quantifying the size of the risk in an overview. The technique employed in this study differs from other risk assessment techniques in that the subjective elements of evaluators were excluded as much as possible by utilizing past occupational accident statistics. This study aims to calculate the size of the risk, regardless of evaluators, such as a manager, supervisor, safety manager, or employee. The size of the risk is the combination of the likelihood and severity of an accident. In this study, the likelihood of an accident was evaluated using the theory of Bud Accident Chainability, and the severity of an accident was calculated using the occupational accident statistics over the past five years according to the accident classification by the International Labor Organization.

12
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KCI등재

1배관 체계 자율 복구 알고리즘 비교, 분석 및 고찰

저자 : 양대원 ( Dae Won Yang ) , 이정훈 ( Jeung-hoon Lee ) , 신윤호 ( Yun-ho Shin )

발행기관 : 한국안전학회 간행물 : 한국안전학회지(구 산업안전학회지) 36권 4호 발행 연도 : 2021 페이지 : pp. 1-11 (11 pages)

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(기관인증 필요)

초록보기

Piping systems comprising pumps and valves are essential in the power plant, oil, and defense industry. Their purpose includes a stable supply of the working fluid or ensuring the target system's safe operation. However, piping system accidents due to leakage of toxic substances, explosions, and natural disasters are prevalent In addition, with the limited maintenance personnel, it becomes difficult to detect, isolate, and reconfigure the damage of the piping system and recover the unaffected area. An autonomous recovery piping system can play a vital role under such circumstances. The autonomous recovery algorithms for the piping system can be divided into low-pressure control algorithms, hydraulic resistance control algorithms, and flow inventory control algorithms. All three methods include autonomous opening/closing logic to isolate damaged areas and recovery the unaffected area of piping systems. However, because each algorithm has its strength and weakness, appropriate application considering the overall design, vital components, and operating conditions is crucial. In this regard, preliminary research on algorithm's working principle, its design procedures, and expected damage scenarios should be accomplished. This study examines the characteristics of algorithms, the design procedure, and working logic. Advantages and disadvantages are also analyzed through simulation results for a simplified piping system.

KCI등재

2FTA를 이용한 볼트 유도가열시스템의 고장 및 전기화재 분석

저자 : 김두현 ( Doo-hyun Kim ) , 김성철 ( Sung-chul Kim ) , 엄한얼 ( Haneol Eom ) , 강문수 ( Moon-soo Kang ) , 정천기 ( Cheon-kee Jeong )

발행기관 : 한국안전학회 간행물 : 한국안전학회지(구 산업안전학회지) 36권 4호 발행 연도 : 2021 페이지 : pp. 12-19 (8 pages)

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초록보기

This paper presents a safety assessment method for FTA-based induction heating systems; the failures and causes of electrical fire are first analyzed for each part and module qualitatively, and methods to manage high probabilities of failure and electrical fire are considered, thereby improving the reliability of the induction heating system. The cumulative importance value (ACC) of the minimal cut set is drawn by setting failure as the top event, and STACK and SMPS are observed to account for about 70% of the induction heating system failures. Thus, intensively managing the basic events contained in the minimal cut set of failures for STACK and SMPS is expected to provide effective and stable operation of the induction heating system. When electrical fire is set as the top event, the STACK percentage is 90%. Accordingly, the current IGBT is changed to a FET to increase the applied voltage and prevent induction heating system failure, and a heat sink plane is installed to prevent FET heating caused by switching, thereby preventing an electrical fire. By classifying the parts and modules of the induction heating system in detail and by applying FTA based on actual failure rates and relevant data, more practical and reasonable results may be expected. Hence, continuous research must be conducted to ensure safety when using induction heating systems.

KCI등재

3발전기의 전자기장 분포 특성에 따른 작업자 노출공간 분석

저자 : 성민영 ( Minyoung Seong ) , 김두현 ( Doo-hyun Kim ) , 김승태 ( Seungtae Kim )

발행기관 : 한국안전학회 간행물 : 한국안전학회지(구 산업안전학회지) 36권 4호 발행 연도 : 2021 페이지 : pp. 20-28 (9 pages)

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초록보기

With an increase in the commercialization of electricity, and the development of advanced and large electric devices and various wireless radio wave services, concerns over the effects of electromagnetic fields on human health have increased. Accordingly, the World Health Organization encouraged the development of international standards by establishing the 'International Electromagnetic Fields Project' in 1996 based on studies on the harmful effects of electromagnetic fields on the human body. Moreover, the National Institute of Environmental Health Sciences (NIEHS) classified electromagnetic fields as possible carcinogens under Group 2B category, even though they have been found to have a weak correlation with those effects on human health. Mid-to-large-sized electric facilities used at industrial sites mostly adopt a commercial frequency of 60 ㎐, and workers handling these facilities are exposed to such extremely low frequency (ELF) fields for a long time. A previous study suggested that exposure to ELF electromagnetic fields with frequency ranges from 0 to 300 ㎐, even for a short time, at densities higher than 100 μT may have harmful effects on human body as it affects the activation of nerve cells in the central nervous system by inducing an electric field and current and stimulating muscles and the nervous system in the body. Such studies, however, focused on home appliances used by ordinary people, and research on facilities utilizing high-capacity current and operated by workers at industrial sites is lacking. Therefore, in this study, a 3000 kilowatt generator, which is a high-capacity electric facility employed at industrial sites, was investigated, and the size of the magnetic fields generated during its no-load and high-load operations per distance to produce a map was measured to reveal spots deemed hazardous according to domestic and international exposure standards. The findings of this study is expected to alleviate workers' anxiety about the harmful effects of magnetic fields on their body and to minimize the level of exposure during operations.

KCI등재

4재사용 시스템비계와 시스템동바리 수직재의 허용강도 분석

저자 : 박진석 ( Jin-suk Park ) , 고상섬 ( Sang Seom Ko ) , 원정훈 ( Jeong-hun Won )

발행기관 : 한국안전학회 간행물 : 한국안전학회지(구 산업안전학회지) 36권 4호 발행 연도 : 2021 페이지 : pp. 29-36 (8 pages)

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The allowable strength based on experiments and the design allowable strength calculated using the design criteria were compared, which suggested a ratio between the allowable strengths for the reused vertical members of the system scaffolding and system support. By investigating a total of 421 certification reports for reused vertical members, the experimental allowable strengths were collected. Using design criteria such as the road bridge design and KDS 14 30 10, the design allowable strengths were calculated for various slenderness ratios. For the system scaffolding, the average ratio between the experimental and design allowable strengths was calculated to be 0.880 by assuming a normal distribution for all specimens. However, by analyzing the strength ratio according to the slenderness ratio, the lowest average strength ratio was found to be at least 0.844. Therefore, it is reasonable to assume that the allowable strength of the reused vertical members was 80-84% of the design allowable strength. In addition, assuming the allowable strength to be 85% of the design allowable strength is a possible method for reused vertical members of system supports.

KCI등재

5건설기술진흥법과 산업안전보건법 비교분석을 통한 건설업 안전관리 및 계획의 개선방안

저자 : 김시억 ( Si Ouk Kim ) , 윤영근 ( Young Geun Yoon ) , 오태근 ( Tae Keun Oh )

발행기관 : 한국안전학회 간행물 : 한국안전학회지(구 산업안전학회지) 36권 4호 발행 연도 : 2021 페이지 : pp. 37-46 (10 pages)

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According to the Korean Statistical Information Service, the number of fatal occupational accidents per 100,000 workers is the highest in Korea, among all the OECD countries. The safety of construction workers is managed by the construction technology promotion act (CTPA) and the occupational safety and health act (OHSA). A review of the current safety management laws is required to improve them for the construction industry, where the numbers of accidents and deaths are constantly increasing. Accordingly, the aim of this study was to identify the problems in unclear business areas through comparison and analysis of the CTPA and OHSA guidelines and establish effective site-dependent construction safety management plans. The overlapping safety and health management terms and tasks of organizations were derived along with identifying the overlapping items of the safety management and hazard and risk prevention plans. Based on these results, several improvements for the design stage, safety cost, and safety education have been suggested in this paper. In addition, an improved model based on the integration and an optimized compromise between these two laws for safety management in areas where many accidents have occurred in recent years has been reported here.

KCI등재

6국가별 건설업 사고사망만인율 산출방식 차이에 대한 비교

저자 : 정재민 ( Jae Min Jeong ) , 이채현 ( Chae Hyun Lee ) , 심유경 ( Yu Kyung Sim ) , 정재욱 ( Jae Wook Jeong ) , 이재현 ( Jae Hyun Lee )

발행기관 : 한국안전학회 간행물 : 한국안전학회지(구 산업안전학회지) 36권 4호 발행 연도 : 2021 페이지 : pp. 47-53 (7 pages)

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The fatality rate is used to estimate each country's risk level. However, the fatality rate is calculated using the number of fatal accidents and workers, which is collected differently across countries. It is therefore problematic to use these numbers in an equivalent way. This study proposes a new approach for calculating the number of full-time equivalent workers when evaluating individual countries' fatality rate by suggesting an equivalent condition for the calculation of the number of full-time equivalent workers. This study proceeds in three steps: (i) analysis of the fatality rate among various countries; (ii) fatality rate calculation using the full-time equivalent workers; and (iii) comparison of the fatality rate among various countries. The study found that for the fatality rate based on national data, the fatality rate in South Korea (1.72‱) is 10 times higher than that in United Kingdom (0.17‱). However, according to the number of full-time equivalent workers, the fatality rate in South Korea (1.86‱) was three times higher than that in the United Kingdom (0.56‱). These findings reveal a difference in the fatality rate depending on the method used to calculate the number of full-time equivalent workers. Therefore, the number of full-time equivalent workers must be calculated for each country to accurately compare the fatality rate. Ultimately, the study's results highlight the need for clearer standards in the assessment of the fatality rate by country in international organizations such as the ILO.

KCI등재

7스마트 건설안전기술 도입으로 인한 안전관리자의 역할 스트레스 영향 요인에 관한 연구

저자 : 소한섭 ( Hansub So ) , 설문수 ( Mun-su Seol ) , 맹인영 ( Inyoung Maeng ) , 박교식 ( Kyoshik Park ) , 박종근 ( Jongkeun Park )

발행기관 : 한국안전학회 간행물 : 한국안전학회지(구 산업안전학회지) 36권 4호 발행 연도 : 2021 페이지 : pp. 54-61 (8 pages)

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The purpose of this paper is to verify if safety managers must bear stress from additional tasks whenmanaging smart safety technology applications on construction sites. We conducted a survey of 133 safety managers who had experienced managing both safety management and smart safety technology applications at construction sites, and used the SPSS Statistics 25 and AMOS 22 programs to analyze the survey's logicality and the data that we collected. We found that the work burden caused by assuming additional tasks to manage smart safety technology applications affected the stress that safety managers experience when working at construction sites. The stress caused by an increased work burden led construction site safety managers to feel dissatisfied with their jobs. This finding indicates that both on the original job and on additional tasks are entirely mediated. Based on this finding, I suggest that the South Korean government should establish smart safety technology applications, thus reducing the work burden and increasing the job satisfaction for construction site safety managers.

KCI등재

8AcciMap, STAMP, FRAM을 이용한 반응기 세척 작업 중 화재 사고 분석

저자 : 서동현 ( Dong-hyun Seo ) , 배계완 ( Bae Gye Wan ) , 최이락 ( Yi-rac Choi ) , 한우섭 ( Ou-sup Han )

발행기관 : 한국안전학회 간행물 : 한국안전학회지(구 산업안전학회지) 36권 4호 발행 연도 : 2021 페이지 : pp. 62-70 (9 pages)

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Representative systematic accident analysis methods proposed so far include AcciMap, STAMP, and FRAM. This study used these three techniques to analyze a fire accident case that occurred during routine manufacturing work in a domestic chemical plant and compared the results. The methods used different approaches to identify the cause of the accident, but they all highlighted similar causal factors. In addition to technical issues, the three accident analysis methods identified factors related to safety education, risk assessment, and the operation of the process safety management system, as well as management philosophy and company culture as problems. The AcciMap and STAMP models play complementary roles because they use hierarchical structures, while FRAM is more effective in analyses centered on human and organizational functions than in technical analyses.

KCI등재

9주택 내 수소연료전지 전용실의 폭발 위험성에 대한 실험적 연구

저자 : 박병직 ( Byoungjik Park ) , 김양균 ( Yangkyun Kim ) , 황인주 ( Inju Hwang )

발행기관 : 한국안전학회 간행물 : 한국안전학회지(구 산업안전학회지) 36권 4호 발행 연도 : 2021 페이지 : pp. 71-79 (9 pages)

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In this study, a real-scale fuel-cell room of volume 1.36 m3 is constructed to confirm the explosion characteristics of hydrogen-air mixture gas in a hydrogen-powered house. A volume concentration of 40% is applied in the fuel-cell room as the worst-case scenario to examine the most severe accident possible, and two types of doors (made of plastic sheet and wood) are fabricated to observe their effects on the overpressure and impulse. The peak overpressure and impulse based on distance from the ignition source are experimentally observed and assessed. The maximum and minimum overpressures with a plastic-sheet door are about 20 and 6.7 kPa and those with a wooden door are about 46 and 13 kPa at distances of 1 and 5 m from the ignition source, respectively. The ranges of impulses for distances of 1-5 m from the ignition source are about 82-28 Pa·s with a plastic-sheet door and 101-28 Pa·s with a wooden door. The amount of damage to people, buildings, and property due to the peak overpressure and impulse is presented to determine the safe distance; accordingly, the safe distance to prevent harm to humans is about 5 m based on the 'injuries' class, but the structural damage was not serious.

KCI등재

10산업재해통계기반 Risk 산정에 관한 연구

저자 : 우종권 ( Jong-gwon Woo ) , 이미정 ( Mi-jeong Lee ) , 설문수 ( Mun-su Seol ) , 백종배 ( Jong-bae Baek )

발행기관 : 한국안전학회 간행물 : 한국안전학회지(구 산업안전학회지) 36권 4호 발행 연도 : 2021 페이지 : pp. 80-87 (8 pages)

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Risk assessment techniques are processes used to evaluate hazardous risk factors in construction sites, facilities, raw materials, machinery, and equipment, and to estimate the size of risk that could lead to injury or disease, and establish countermeasures. The most important thing in assessing risk is calculating the size of the risk. If the size of the risk cannot be calculated objectively and quantitatively, all members who participated in the evaluation would passively engage in establishing and implementing appropriate measures. Therefore, this study focused on predicting accidents that are expected to occur in the future based on past occupational accident statistics, and quantifying the size of the risk in an overview. The technique employed in this study differs from other risk assessment techniques in that the subjective elements of evaluators were excluded as much as possible by utilizing past occupational accident statistics. This study aims to calculate the size of the risk, regardless of evaluators, such as a manager, supervisor, safety manager, or employee. The size of the risk is the combination of the likelihood and severity of an accident. In this study, the likelihood of an accident was evaluated using the theory of Bud Accident Chainability, and the severity of an accident was calculated using the occupational accident statistics over the past five years according to the accident classification by the International Labor Organization.

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