• Title/Summary/Keyword: hazard identification

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An expert system for hazard identification in chemical processes

  • Chae, Heeyeop;Yoon, Yeo-Hong;Yoon, En-Sup
    • 제어로봇시스템학회:학술대회논문집
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    • 1992.10b
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    • pp.430-435
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    • 1992
  • Hazard identification is one of the most important task in process design and operation. This work has focused on the development of a knowledge-based expert system for HAZOP (Hazard and Operability) studies which are regarded as one of the most systematic and logical qualitative hazard identification methodologies but which require a multidisciplinary team and demand much time-consuming, repetitious work. The developed system enables design engineers to implement existing checklists and past experiences for safe design. It will increase efficiency of hazard identification and be suitable for educational purposes. This system has a frame-based knowledge structure for equipment failures/process material properties and rule networks for consequence reasoning which uses both forward and backward chaining. To include wide process knowledge, it is open-ended and modular for future expansion. An application to LPG storage and fractionation system shows the efficiency and reliability of the developed system.

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AUTOMATED HAZARD IDENTIFICATION FRAMEWORK FOR THE PROACTIVE CONSIDERATION OF CONSTRUCTION SAFETY

  • JunHyuk Kwon;Byungil Kim;SangHyun Lee;Hyoungkwan Kim
    • International conference on construction engineering and project management
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    • 2013.01a
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    • pp.60-65
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    • 2013
  • Introducing the concept of construction safety in the design/engineering phase can improve the efficiency and effectiveness of safety management on construction sites. In this sense, further improvements for safety can be made in the design/engineering phase through the development of (1) an automated hazard identification process that is little dependent on user knowledge, (2) an automated construction schedule generation to accommodate varying hazard information over time, and (3) a visual representation of the results that is easy to understand. In this paper, we formulate an automated hazard identification framework for construction safety by extracting hazard information from related regulations to eliminate human interventions, and by utilizing a visualization technique in order to enhance users' understanding on hazard information. First, the hazard information is automatically extracted from textual safety and health regulations (i.e., Occupational Safety Health Administration (OSHA) Standards) by using natural language processing (NLP) techniques without users' interpretations. Next, scheduling and sequencing of the construction activities are automatically generated with regard to the 3D building model. Then, the extracted hazard information is integrated into the geometry data of construction elements in the industry foundation class (IFC) building model using a conformity-checking algorithm within the open source 3D computer graphics software. Preliminary results demonstrate that this approach is advantageous in that it can be used in the design/engineering phases of construction without the manual interpretation of safety experts, facilitating the designers' and engineers' proactive consideration for improving safety management.

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A Hazard Identification and Analysis for the Train Control System of Light Rail Transit (경량전철 열차제어시스템의 위험요인 분석)

  • 정의진;김양모
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.53 no.2
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    • pp.99-106
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    • 2004
  • Train control system in LRT (Light Rail Transit) is developed as a part of "Light Rail Transit System Development Project". But there was no specific requirement representing the system safety. Because system safety must be ensured before the customization, we applied the system to a officially recognized specific procedure, such as "A Guideline to Ensure the Safety of Train Control System in Korea" that was officially announced by KNR (Korea National Railroad) in 2001. We should draw system safely requirement to guarantee system safety for the first time. In this paper, the hazard identification and analysis to derive the safety requirement on LRT train control system are carried out following the KNR guideline. To analyze hazard, we have to deduce system functions, identify related hazards, derive the effects of the hazards, analyze current risk, define the target risk of the system, and deduce the alternative plans to reduce the effects of the hazards. After the hazard analysis following the upper procedure, 30 hazards are identified and analysed. Especially detailed analysis on train collision that is a main hazard of the train control of system is specially carried out.

Identification of hazardous chemicalsin semiconductor manufacturing (반도체 제조업에서 유해화학물질의 확인)

  • Kim, Soo-Geun
    • Journal of Korean Society of Occupational and Environmental Hygiene
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    • v.22 no.1
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    • pp.20-25
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    • 2012
  • Objectives: Hazard identification is the most important step in occupational health monitoring at the workplace. This paper reviewed the several related stuffs to the hazard identification in the semiconductor industry. Methods: I checked the MSDS system, chemical toxic informations, trade secrets and by-products by experience and the literature used in semiconductor industry. Results: I found and experienced as follows; (1) There are a few inventory and history of chemicals used in workplace. Toxic information of chemicals to be available is very limited. (2) There are many trade secrets in MSDS for chemical mixtures. It is difficult to identify the accurate information from MSDS. (3) By-products is necessary to identify that they will produce in workplace. Conclusions: It is necessary to regulate the obligations of employers which check the inventory and history of chemicals used in workplace. It is necessary to amend the trade secrets in MSDS system.

철도신호시스템에서의 향상된 안전성확보방안에 대한 연구

  • 이종우;신덕호;이기서
    • Journal of the Korean Society for Railway
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    • v.6 no.2
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    • pp.9-18
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    • 2003
  • This paper discuss advanced safety in the railway signaling system. The specified methods and HAZOP about Hazard identification and analysis of railway signalling system were studied, and loss analysis and ALARP model in order to calculate safety as a standard capacity were proposed. It was also resulted from Hazard identification, analysis and evaluation by applying advanced safety to the railway signalling system.

A Study on Hazard Identification Method for Small and Medium Chemical Industries (중·소 화학공장에 적합한 위험성 평가 기법 개발에 관한 연구)

  • Lee, Jae Min;Yoo, Jin Hwan;Ko, Jae Wook
    • Korean Chemical Engineering Research
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    • v.45 no.1
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    • pp.103-108
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    • 2007
  • HAZOP analysis is a systematic method on the basis of the experts' experience and knowledge and is used for hazard identification and risk assessment by using brainstorming method. So, HAZOP analysis has been applied to major chemical industries efficiently. But it does not apply to small and midium chemical industries because of the insufficiency of the experts. Hence, in this study a new hazard identification method is proposed by modifying complexity and expertise of the HAZOP analysis and will be contributed to improve risk management for small and midium chemical industries.

Classification of Construction Worker's Activities Towards Collective Sensing for Safety Hazards

  • Yang, Kanghyeok;Ahn, Changbum R.
    • International conference on construction engineering and project management
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    • 2017.10a
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    • pp.80-88
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    • 2017
  • Although hazard identification is one of the most important steps of safety management process, numerous hazards remain unidentified in the construction workplace due to the dynamic environment of the construction site and the lack of available resource for visual inspection. To this end, our previous study proposed the collective sensing approach for safety hazard identification and showed the feasibility of identifying hazards by capturing collective abnormalities in workers' walking patterns. However, workers generally performed different activities during the construction task in the workplace. Thereby, an additional process that can identify the worker's walking activity is necessary to utilize the proposed hazard identification approach in real world settings. In this context, this study investigated the feasibility of identifying walking activities during construction task using Wearable Inertial Measurement Units (WIMU) attached to the worker's ankle. This study simulated the indoor masonry work for data collection and investigated the classification performance with three different machine learning algorithms (i.e., Decision Tree, Neural Network, and Support Vector Machine). The analysis results showed the feasibility of identifying worker's activities including walking activity using an ankle-attached WIMU. Moreover, the finding of this study will help to enhance the performance of activity recognition and hazard identification in construction.

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Development of Hazard List for Railway Accidents/Incidents through Identification of Risk Sources (철도 사고/장애 위험요인 분석을 통한 위험목록(Hazard List)체계 수립에 관한 연구)

  • Park Chan-Woo;Park Joonam;Cho Yun-Ok;Wang Jong-Bae
    • Proceedings of the KSR Conference
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    • 2005.11a
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    • pp.581-586
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    • 2005
  • In this study, a hazard list is developed for accidents/incidents of Korean railway through identification of the risk sources. The risk sources are classified by the progress of the accidents/incidents, which consists of cause, triggering event, and failure of the safety system. The hazard list of railway accidents/incidents of Korea is then developed through extensive review of both domestic and foreign data for railway accidents/incidents risk sources. The list is refined for each of six subsystems of the railway system, which includes safety management system, operation management, human error and qualification management, installations and equipments, external hazard, and railway level crossing.

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A Study on the Hazard Identification for the Implementation of A-SMGCS (A-SMGCS 구현을 위한 위험요소 식별에 대한 연구)

  • Hong, Seung-Beom;Choi, Seung-Hoon;Choi, Youn-Chul
    • Journal of Advanced Navigation Technology
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    • v.19 no.1
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    • pp.41-47
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    • 2015
  • Recently, it is actively under study for the implementation of advance surface movement ground control systems (A-SMGCS) level IV in Korea. To ensure the safety of the A-SMGCS system needs the safety assessment, and Eurocontrol is encouraged to perform the functional hazard assessment, preliminary system safety assessment, and system safety assessment to the safety assessment of A-SMGCS. In this paper, we identify the hazard of A-SMGCS through a functional hazard assessment. Therefore, we will identify 29 types of hazard for the A-SMGCS level IV and serve as important data to evaluate the severity of each hazard.

A Study on the Hazard Identification and Risk Mitigation for ATSRX Using Hazard and Operability Study (HAZOP Study를 사용한 ATSRX의 위험원도출 및 리스크 완화에 관한 연구)

  • LEE Jun-Ho;LEE Kang-Mi;KIM Yong-Kyu;SHIN Ducko
    • Journal of the Korean Society for Railway
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    • v.8 no.6 s.31
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    • pp.533-538
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    • 2005
  • In this paper we identity the hazard using HAZOP study for ATSRX which is a subsystem of the ATP system, and we study a safety management method for the mitigation of the risk to the acceptable level. ATSRX is a device that make a train which has a ATP system operate in ATS line. For this ATSRX send a induction signal with ATS system to vehicle controller. Thus ATSRX can be said a safety equipment that makes a train operate safely. In order to identify the hazard for the internal faults in ATSRX system, we employ HAZOP study method which is recommended as hazard identification in IEC 62278, RAMS requirements in railway signal, and also it provide the detail activity in IEC 61882. Thus, in this paper we perform HAZOP study based on ATSRX related standards and using the assessment of the identified hazard we study a method to guarantee the system safety through the change of the design to mitigate the risk to the acceptable level.