• Title/Summary/Keyword: safety handling

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Hazardous Material Process Risk Evaluation Using HAZOP and Bow-tie (HAZOP 및 BOW-TIE를 이용한 위험물질 취급공정의 위험성평가)

  • Min-Seo Nam;Byung-Tae Yoo
    • Journal of the Korean Institute of Gas
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    • v.28 no.1
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    • pp.35-43
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    • 2024
  • With continuous advancements in industry, science, and technology, there is a steady increase in the number and utilization of new chemicals. The growing societal emphasis on chemical safety management is paralleled by an increasing public demand for robust safety measures. While various ministries at the government level oversee the safety management of chemical substances, the occurrence of accidents related to chemical substances remains frequent each year due to problems such as aging facilities and careless handling. Upon analyzing domestic chemical accident cases, incidents occurred predominantly in the sequence of leakage, explosion, fire, and others. The main causes of these accidents were examined, revealing facility defects and non-compliance with safety management as the primary contributing factors. In this study, Hazard and Operability Analysis (HAZOP) was employed to identify hazardous risk factors associated with the handling of hydrofluoric acid in workplaces, and a risk assessment was performed using Bow-Tie method. Based on the results of this study, it is expected to enhance safety management plans aimed at preventing chemical accidents in workplaces dealing with similar facilities. Ultimately, these insights contribute to the development of an advanced chemical safety management system, capable of proactively preventing potential chemical accidents.

Analysis of Foot Pressure according to the Work Postures on Fire Fighters (소방대원들의 작업자세에 따른 족저압력 분석)

  • Son, Sung Min;Roh, Hyo Lyun
    • Journal of the Korean Society of Safety
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    • v.28 no.1
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    • pp.88-94
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    • 2013
  • The purpose of this study is to find out the difference of foot pressure according to the firefighter's work postures for providing the basic information to prevent Musculoskeletal disorders. This study was conducted by 9 male firefighters. Work postures were selected for rescuee handling, fire hose and hydraulic rescue equipment work postures. These were divided into 3 position, "High", "Middle" and the postures of taking out and letting down hydraulic rescue equipment were analyzed as starting point and end point respectively. Foot Pressure was used to analyze contact area, peak pressure, and maximum force in terms of work postures, and compared between fire hose and hydraulic rescue equipment work postures. The results of foot pressure are as follows. According to the results of rescuee handling work postures, one person handling posture showed wide contact area and foot pressure showed the highest at right foot. Accoridng to the (High), (Middle), (Low) postures of fire hose, the results didn't show the difference among the contact area, peak pressure and maximum force. As the results of hydraulic rescue equipment work postures, (Low) postures showed the highest in terms of the right foot of contact area, peak pressure and maximum force and (High) postures showed the highest in left foot. The increase of foot pressure lead to be inconvenience of low extremity and muscle fatigue for maintaining postural control cause pain. Thus, it is necessary to design insole-equipped working shoe for reduce the impulse and effect of foot during the rescuee handling work which standing out as foot pressure.

VEHICLE DYNAMIC SIMULATION USING A NONLINEAR FINITE ELEMENT ANALYSIS CODE

  • Yu, Y.S.;Cho, K.Z.;Chyun, I.B.
    • International Journal of Automotive Technology
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    • v.6 no.1
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    • pp.29-35
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    • 2005
  • The structural integrity of either a passenger car or a light truck is one of the basic requirements for a full vehicle engineering and development program. The results of the vehicle product performance are measured in terms of ride and handling, durability, Noise/Vibration/Harshness (NVH), crashworthiness, and occupant safety. The level of performance of a vehicle directly affects the marketability, profitability and, most importantly, the future of the automobile manufacturer. In this study, the Virtual Proving Ground (VPG) approach has been developed to simulate dynamic nonlinear events as applied to automotive ride & handling. The finite element analysis technique provides a unique method to create and analyze vehicle system models, capable of including vehicle suspensions, powertrains, and body structures in a single simulation. Through the development of this methodology, event-based simulations of vehicle performance over a given three-dimensional road surface can be performed. To verify the predicted dynamic results, a single lane change test was performed. The predicted results were compared with the experimental test results, and the feasibility of the integrated CAE analysis methodology was verified.

Chromosome Aberrations and Sister Chromatid Exchanges in Peripheral Lymphocyte of Nurses Handling Anticancer Drugs (항암제 취급 간호사의 염색분이상 및 자매염색분교환빈도)

  • 김소정;이성은;정해원
    • Journal of Environmental Health Sciences
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    • v.21 no.3
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    • pp.67-76
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    • 1995
  • The frequencies of chromosome aberrations and sister chromatid-exchanges in peripheral blood lymphocyte of 44 nurses handling anticancer drugs were compared with those in 44 age-match controls. The frequencies of dicentric chrdmosome were $2.4\times 10^{-3}$ in the exposed and $0.5\times 10^{-3}$ in the control. The frequencies of sister cromatid exchanges in the exposed were slightly higher (5.68 SCEs/cell) than those in the control (5.04 SCEs/cell). The frequencies of chromosome aberrations and sister cromatid exchanges were not associated with duration of drug handling and types of anticancer drugs, but associated with use of safety cover.

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Recognition Survey for Quality Improvement of Ground Handling Service - Focused on Incheon International Airport - (지상조업서비스 품질 제고를 위한 인식조사 -인천공항을 중심으로-)

  • Park, Jung-Hee;Choi, Yu-Jin
    • Journal of the Korean Society for Aviation and Aeronautics
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    • v.26 no.2
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    • pp.116-122
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    • 2018
  • Due to the opening of Incheon International Airport Terminal 2, the operation range of ground operators is expanding and the workload is increased, which may cause a deterioration of the operation quality. Airline and airport corporations are concerned about safety delays as well as delays in flight due to delays in operations. Air traffic demand at Incheon International Airport is expected to increase steadily in the future. Therefore, this study intends to derive quality improvement plan by investigating the perception of stakeholders about the status of fishing service in order to improve service quality of Incheon airport ground handling company. The results of the analysis are expected to be used as basic data for improving quality of service.

Virtual Prototyping of Spent Fuel Disassembling Process Using Graphic Simulator (그래픽 시뮬레이터에 의한 사용후핵연료 집합체 해체공정 가상모형)

  • 이종열;송태길;김성현;김영환;홍동희;윤지섭
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2001.04a
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    • pp.760-763
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    • 2001
  • In this study, the graphical design system is developed and the digital mock-up is implemented for designing the spent fuel handling and disassembling processes. This system is used throughout the design stages from the conceptual design to the motion analysis. By using this system, all the processes involved in the spent fuel handling and disassembling precesses are analyzed and optimized. Also, this system is used in developing the on-line graphic simulator to enhance the reliability and safety of the spent fuel handling process by providing the remote monitoring function of the process. The graphical design system and the digital mock-up system can be effectively used for designing the process equipment, as well as the optimization of the main processes and maintenance processes of the spent fuel management.

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A study on Precise Grasping Control of End-Effector for Parts Assembling and Handling (부품조립 및 핸들링을 위한 말단효과장치의 정밀 그리핑 제어에 관한 연구)

  • Ha, Un-Tae;Sung, Ki-Won;Kang, Eun-Wook
    • Journal of the Korean Society of Industry Convergence
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    • v.18 no.3
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    • pp.173-180
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    • 2015
  • In this paper, we propose a new precise control technology of robotic gripper for assembling and handling of part. When a robot manipulator interacts mechanically with its environment to perform tasks such as assembly or edge-finishing, the end-effector is thereby constrained by the environment. Therefore grasping force control is very important, since it increases safety due to monitoring of contact force. A comparison of various force control architecture is reported. Different force control methods can often be configured to achieve similar results for a given task, and the choice of control algorithm depends strongly on the application or on the characteristics of a particular robot. In the research, the adjustable gripping force can be controlled and improved the accuracy using the artificial intelligence techniques.

Determination of Number of AGVs in Multi-path Systems By Using Genetic Algorithm (GA를 이용한 다중루프 시스템의 AGV 대수 결정 문제)

  • 김환성;이상훈
    • 제어로봇시스템학회:학술대회논문집
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    • 2000.10a
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    • pp.299-299
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    • 2000
  • In this paper, a determination method of number of AGVs fer introducing to the multi-path material handling systems is presented by using genetic algorithm. For serving the raw material to each work stations automatically, there needs to introduce a AGVs for transfer the raw martial. To reduce the overall production cost in the material handling systems, however, a trade off exists between the amount of inventory hold on the shop floor and the number of AGVs needed to provide adequate service. In this paper, firstly a objective function which included the net present fixed costs of each stations and each purchased AGVs, delivering cost. stock inventory cost, and safety stock inventory cost is presented. Secondly by using genetic algorithm, the optimal reorder quantity at each stations is decided, where the number of AGVs is increased step by step. From a simulation with different GA parameters, we can determine a optimal number of AGVs to reduce the overall production cost. Thus, the effectiveness of GA for determining the number of AGVs is verified in automated material handling systems.

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Lead Exposure Indices, Workloads, and Environmental Factors in Battery Manufacturing Workplace

  • Cho, Kwang Sung;Jeong, Byung Yong
    • Journal of the Ergonomics Society of Korea
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    • v.32 no.3
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    • pp.259-266
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    • 2013
  • Objective: This study aims to evaluate the workloads of industrial and automobile storage battery industries and their association to biological exposure indices. Background: Occupational lead exposure at battery manufacturing workplace is the most serious problem in safety and health management. Method: We surveyed 145 workers in 3 storage battery industries. Environmental factors(lead in air, temperature, humidity and vibration)), biological exposure indices(lead in blood and zinc protoporphyrin in blood) and individual workload factors(process type, work time, task type, weight handling and restrictive clothing) were measured in each unit workplace. Results/Conclusion: Air lead concentration is statistically significant in associations with workload factors(process type, work time, task type, and restrictive clothing) and environmental factors (humidity and vibration), whereas zinc protoporphyrin in blood are significantly associated with work time and weight handling. And lead in blood is significantly associated with work time, weight handling and temperature. Application: The results of this study are expected to be a fundamental data to job design.