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정국삼 한국안전학회 2001 세이프티 월드 Vol.1 No.1
최근에 들어서 지하전철의 건설 확대와 도시 지하차도 및 지하구조물의 건설 수요증가 등 대규모 지하생활 공간의 개발이 추진되고 도시 기능의 집중화로, 공간의 유효 이용의 관점에서 적극적으로 지하공간을 활용하고 있는 실정이다. 이와 같이, 기존 건물의 심층화와 지하 주차장 및 지하가, 지하철역 등의 활용성이 증가하면서 더욱 이들 지하 다중이용 시설의 심도화와 대규모화가 이루어지고 있는 것이다. 그러나, 이들 지하시설의 경우, 안전성과 쾌적성을 부여하기 위한 자연채광, 방재, 환기 기술분야의 설계와 시공 기술 등이 선진국의 경우에 비하여 아직 취약한 실정이어서, 이들 시설 공간에서의 환경악화 현상이 클 뿐만 아니라, 특히 방재상의 문제점으로 화재가 발생시, 인명의 피난과 소화 활동의 곤란성 등이 지적되고 있는 것이다.(중략)
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정국삼,류영순 한국산업안전학회 1994 한국안전학회지 Vol.9 No.3
The purpose of this study is to compare the combustability of the formed high density polyethylene (HDPE) with the low density polyethlyene(LDPE). That is, the easiness of ignition is examined by using the methods with Oxygen Index(OI) Tester and ventilation parameter, and the combustion velocity of these potyethylenes is measured by changing the size and shape of opening area. As the result of it, the oxygen index of HDPE, in a ignition, is required more than LDPE. Then, the concentration distribution of CO by combustion is increased when the opening area is small, but, in the same opening area, LDPE tends to increase more than HDPE. In addition, as the ratio of height to width of opening area is increased, combustion velocity becomes faster relatively. In consequence, when it is generally considered, the combustability of LDPE is better than HDPE.
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정국삼,홍광수 한국산업안전학회 1999 한국안전학회지 Vol.14 No.1
At present time, industrial accidents statistics are used as the basic data of the policy to prevent industrial accidents and the plan to applicate the industrial accident insurance. But this statistical data is not sufficient for the effective safety management because it is the expression of the itemized distribution and the frequency for the whole cases. This study tried to correlational analysis for each causes by defining investigational items as their accident parameters. The correlational analysis, between the unsafe action and status and their relational causes, was performed to analyze the occurrence causes of industrial accident. And to assume the severity of accident, the correlativity and independency between causes and direct causes which are defined hospital days subordinate parameter were analyzed. In addition, this study expressed numerically the effectiveness of subordinate parameters depended on the level of independent parameter by presenting the predictive model between dependent parameter and independent parameter, which have the categorical parameter, through the Logit analysis method.
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정국삼 한국산업안전학회 1993 한국안전학회지 Vol.8 No.1
This paper was concerned with the risk assessment about oxidizing substances as dangerous goods by burning test method. The sample, which was formed with the heaped cone-shape, was composed of solid oxidant and sawdust. The burning time of each sample was measured under the following various conditions: circumstance temperature, mixing ratio of oxidizing substance and sawdust particle size of sawdust and kinds of sawdust. As a results the effective combustibility was gained when the sawdust content was 20∼30 wt.% in the sample and the lauan with -30+50 mesh was used. But, although the circumstance temperature increased, burning efficiency of the samples were not affect by it. Finally, the average burning times were obtained by considering the weighting factors related on the mixing ratio and the circumstance temperature. And then, it were compared with the combustion risk level and the effects of cation and anion of oxidizing substances as dangerous goods.
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이상계(異相系) 혼합기에서의 분진운(粉塵雲)의 공간분포에 대한 평가
정국삼,한우섭 한국산업안전학회 1995 한국안전학회지 Vol.10 No.1
This study dealed with problem to estimate the uniformity of dust clouds, as a fundamental study to estimate the ignition hazardous evaluation of hybrid mixtures. The developed method was proposed to grasp space distribution of dusts, and also, an experimental apparatus considering with dispersion and reproduction of dusts were uniquely devised and studied.
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정국삼,강민호 한국산업안전학회 1997 한국안전학회지 Vol.12 No.3
This paper was concerned with temperature aspect in the smoldering time of the accumulated each saw-dust sample of larch, oregon, aromatic trees which was formed with heaped cone-shape. The smoldering time and temperature of each sample was measured under the wind velocity of 0.10∼0.15m/s and circumstance relative humidity of 60%. As a result, the very lowest heat beginning temperature was detected in aromatic. The effective smoldering phenomena in the sample were detected when the larch saw-dust of [-20+40mesh] and the aromatic saw-dust of [-40+50mesh, -50+60mesh]. Finally the larger a particle size of saw-dust was the better a smoldering time was short. Also, it showed more increasing temperature above 70% in the smoldering reaction.
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정국삼,김학성,신창섭 한국안전학회 1986 한국안전학회지 Vol.1 No.1
To remove sulfur dioxide from flue gas by the method of metal oxide, copper powder of average diameter $2.4\mu\textrm{m}$and $51\mu\textrm{m}$ were used in a fixed bed reactor over a, temperature range of $300^{\circ}C-500^{\circ}C$. Copper oxide reacts with sulfur dioxide producing cupric sulfate and it can be regenerated from the latter by using hydrogen or methane. Experimental results showed that the reaction rate was increased by the increase of reaction temperature in the range of $300^{\circ}C-422^{\circ}C$ and the removal efficiency of sulfur dioxide was high in case of small size copper particle. However the removal efficiency was decreased at higher temperature due to decomposition of cupric sulfate. The rate controlling step of this reaction was chemical reaction and deactivating catalysts model can be applied to this reaction. The rate constants for this reaction and deactivation are as follows : k=8,367exp(-10,298/RT) Kd=2.23exp(-8,485/RT)
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