• 한국위험물학회지
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• 제3권1호
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• pp.59-64
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• 2015

Semiconductor industry has large number of chemical inventory and is easily exposed to chemical release incidents. Toxic release is one of the most interested area in evaluating consequence to the vicinity of industry facilities handling hazardous materials. Hydrofluoric acid is one of the typical chemical used in semiconductor facility and is selected and toxic release is evaluated to assess the risk impacted to its off-site. Accident scenarios were listed using process safety information. The scenarios having effect to the off-site were selected and assessed further according to guideline provided by Korea government. Worst case and alternative scenarios including other interested scenarios were evaluated using ALOHA. Each evaluated scenario was assessed further considering countermeasures. The results showed that the facility handling hydroflooric acid is safe enough and needed no further protections at the moment.

• 한국가스학회지
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• 제17권5호
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• pp.81-86
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• 2013

분진폭발은 플라스틱류, 제약, 목재, 곡물 저장고, 고체연료 및 화학약품의 제조와 같은 다양한 산업에서 발생되고 있다. 본 연구에서는 폐목재를 재활용하여 Particle board를 생산하는 공정의 사이로 분진, 함머밀 분진 및 뉴송 분진을 선택하여 분진폭발 특성을 평가하였다. 실험은 20 L 구형 폭발용기를 이용하여 목재 부유분진의 최대폭발압력, 분진폭발지수, 폭발한하계, 및 최소 점화에너지를 측정하고, 평가하였다. 이들 연구결과는 Particle board를 생산하는 제조공정의 화재 폭발사고 예방을 위한 공정안전 정보로 활용할 수 있을 것이다.

• 한국산업융합학회 논문집
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• 제22권2호
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• pp.201-208
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• 2019

Since the introduction of the open innovation at the beginning of the 2000s, various studies have been carried out on the convergence of technologies, such as the development of new technologies and the development of the business domain. while exploring the technologies necessary for the convergence of appropriate technologies in this research, we propose a discovery process of challengeable research areas by means of the integration of heterogeneous fields which are based on the strategic formulation of ICT and chemical safety industry. In this paper, we consequently propose the 103 detailed convergent technologies based on ICT, especially including artificial intelligent technology and smart big-data platform architecture, were derived from the research areas of the chemical safety field, We expect that research related to the safety field will be frustrated in the future.

• 한국안전학회지
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• 제13권1호
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• pp.98-104
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• 1998

Recently, industrial accidents have occurred in various patterns due to the diversity of industries and the integration of facilities. Especially, the major accidents affect broad area and result in huge loss of lives and properties. Domestic researches on techniques for keeping away from such hazardous danger have been actively performed but their activities are limited in some institutes and universities. In advanced countries, integrated management systems like Seveso Directive of EU and OSHA(Occupational Safety and Health Act) of U.S.A. have been legislated along with the systematic research activities. In Korea, the integrated safety management systems called SMS(Safety Management System) and PSM(Process Safety Management) have been applied to major industries. These systems made chemical industries manage the process safety information by collecting and arranging safety data by themselves. In order to implement the system successfully, it is urgently required to prepare a tool for searching and accumulating process safety data systematically. In this study, a computerized prototype of Risk Assessment System which is essential to SMS and PSM was developed as a main system and data base as subsystem to handle safety information.

• 한국가스학회지
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• 제12권3호
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• pp.1-6
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• 2008

갈수록 성장하고 있는 LNG 산업에 있어서 안전관리는 필수적인 요소로 자리잡아가고 있다. 이에 따라 기존의 LNG 저장/수송 시설에 대한 안전 관리를 보다 발전시킬 수 있는 것이 필요하며 최근 발전된 IT 산업은 LNG 저장/수송 시설에 대한 통합 안전관리 시스템을 가능케 했다. 위험성 평가/분석 기술, 폭발, 누출 및 확산 모델 구축 기술, 실시간 모니터링 및 이상 진단 기술, Data reconciliation을 통한 공정 정보 신뢰성 향상 기술 등을 집약하며 웹 환경을 통하여 구축될 통합 안전관리 시스템은 LNG 산업의 안전성 향상과 향후 기술 수출에 큰 기여를 할 것이다.

• 한국안전학회지
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• 제34권4호
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• pp.59-67
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• 2019

Since it is really hard to construct process models based on prior process knowledges, various statistical approaches have been employed to build fault diagnosis models. However, the crucial drawback of these approaches is that the solutions may vary according to the fault magnitude, even if the same fault occurs. In this study, the parameter monitoring approach is suggested. When a fault occurs in a chemical process, this leads to trigger the change of a process model and the monitoring parameters of process models is able to provide the efficient fault diagnosis model. A few important variables are selected and their predictive models are constructed by partial least square (PLS) method. The Euclidean norms of parameters of PLS models are estimated and a fault diagnosis can be performed as comparing with parameters of PLS models based on normal operational conditions. To improve the monitoring performance, cumulative summation (CUSUM) control chart is employed and the changes of model parameters are recorded to identify the type of an unknown fault. To verify the efficacy of the proposed model, Tennessee Eastman (TE) process is tested and this model can be easily applied to other complex processes.

• 한국안전학회지
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• 제27권5호
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• pp.77-87
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• 2012

Compared to a batch reactor, where all reactants are initially charged to the reactor, the semi-batch reactor presents serious advantages. The feed of at least one of the reactants provides an additional way of controlling the reaction course, which represents a safety factor and increases the constancy of the product quality. The aim of this study was to investigate the characteristics of thermal hazard such as a feed time, catalysis concentration and solvent concentration in methylthioisocyanate(MTI) synthesis reaction process. The experiments were carried out by the Multimax reactor system and Accelerating rate calorimeter(ARC). The MTI synthesis reaction process has many reaction factors and complicated reaction mechanism of multiphase reaction. Through this study, we can use as a tool for assessment of thermal hazard of other reaction processes by applying experiment method provided.

• 한국가스학회지
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• 제20권2호
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• pp.49-57
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• 2016

암모니아 수용액은 탈질, 의류의 얼룩제거 등 생활전반에 광범위하게 사용되면서 누출사고도 빈번하게 발생하고 있다. 여기에서는 누출사고 시 비상대응에 필요한 영향범위를 비교적 정확하면서 신속하게 계산할 수 있는 간이 산정표와 산정식을 개발하였다. ALOHA 프로그램을 이용하여 일반적으로 유통되는 암모니아 수용액의 농도(10 % ~ 30 %)에 따른 영향거리를 액면의 크기($1m^2{\sim}500m^2$)별로 산정하여 제시하였다. 또한, 농도와 액면의 크기가 영향거리에 미치는 상관관계를 분석하여 해당 값에서 영향거리를 쉽게 계산할 수 있는 산정식을 개발하였다.

• Korean Chemical Engineering Research
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• 제58권3호
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• pp.493-497
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• 2020

Hazardous area classification is designed to prevent chemical plant explosions in advance. Generally, the duration of the explosive atmosphere is used for zone type classification. Herein, IEC code, a quantitative zone type classification methodology, was used to achieve Zone 2 NE, which indicates a practical non-explosion condition. This study analyzed the operating pressure of a vessel handling propane to achieve Zone 2 NE by applying the IEC code via MATLAB. The resulting zone type and hazardous area grades were compared with the results from other design standards, namely API and EI codes. According to the IEC code, the operating pressure of vessels handling propane should be between 101325-116560.59 Pa. In contrast, the zone type classification criteria used by API and EI codes are abstract. Therefore, since these codes could interpret excessively explosive atmospheres, care is required while using them for hazardous area classification design.

• 한국위험물학회지
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• 제3권1호
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• pp.52-58
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• 2015

Since the HF release in 2012 in Korea, it became one of the most significant to evaluate consequence to the vicinity of industry facilities handling hazardous materials. BTX plant is selected to assess off-site risk to check whether the facility satisfies the Chemical Control Law by Korea Government. Accident scenarios were listed using process safety information. The scenarios having effect to the off-site were selected and assessed further according to guideline provided by Korea government. Worst case and alternative scenarios including other interested scenarios were evaluated using ALOHA. Each evaluated scenario was assessed further considering countermeasures. The results showed that the facility handling chloric acid is safe enough and needed no further protections at the moment.