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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korean Institute of Gas
Journal Basic Information
Journal DOI :
The Korean Institute of GAS
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Volume & Issues
Volume 2, Issue 4 - Dec 1998
Volume 2, Issue 3 - Sep 1998
Volume 2, Issue 2 - Jun 1998
Volume 2, Issue 1 - Mar 1998
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A Study on the Advancement of Quantitative Risk Assessment for the PBL Process - The Center of FTA and Consequence Analysis-
Lee Young-Soon ; Kang Sun-Jung ; Choi Bong-Sun ; Kim Hyong-Shuk ;
Journal of the Korean Institute of Gas, volume 2, issue 2, 1998, Pages 1~11
A quantitative risk assessment and consequence analysis for PBL(Poly Butadiene Latex) reaction processes were performed. As a result of the Quantitative risk assessment, for the accident probability of PBL reactors causing a reaction runaway, was calculated as
The most important factor that affected the accident probability of PBL reactor was the relief device. When the reactor exploded, peak overpressure at the target point was
and the range of effects windows to be broken occurred in almost all of the factory areas. The maximum radius of effect was 27m, in which workers could be die by the direct for eardrum damage was calculated at 77m. When the PBL reactor exploded, the extent of structural damage to buildings was calculated from the center of the explosion to a range of 52m. The results of the study's assessment have provided a direction for facility's improvement as well as effective safety investment.
Quantitative Risk Assessment of City Gas Facilities Using Geographic Information System
Lee Jeung-Woo ; Kim Ky-Soo ; Ko Jae-Wook ;
Journal of the Korean Institute of Gas, volume 2, issue 2, 1998, Pages 12~17
The number of fuel gas accidents is increasing in domestic fuel gas facilities as increasing the supply area. To prevent gas accident, the government institutions related to fuel gas industry partly collected and managed the information of physical properties and safety data. Due to the overlap of data between institutions, collecting and managing the safety information was inefficient. The purpose of this research is developing geographic information system which providing the information of quantitative risk assessment, accident prevention plan, and efficient sharing and managing of the system.
Development of the computer program calculating the stress induced by various loads for buried natural gas pipeline ( I )
Bang I.W. ; Kim H.S. ; Kim W.S. ; Yang Y.C. ; Oh K.W. ;
Journal of the Korean Institute of Gas, volume 2, issue 2, 1998, Pages 18~25
According to the requirements of ANSI B3l.8, the pipe thickness is determined with hoop stress resulted from internal pressure. And the other loads induced by soil, vehicle, thermal expansion, ground subsidence, etc shall be evaluated rationally. There are two ways of calculating stress of buried gas pipeline. The first is FEM. FEM can calculate the stress regardless of the complexity of pipeline shape and boundary conditions. But it needs high cost and long time. The second is the way to use equation. The reliable equations to calculate the stress of buried gas pipeline was developed and have been used in designing pipeline and evaluating pipeline safety, But these equation are very difficult to understand and use for non-specialist. For easy calculation of non-specialist, the new computer program to calculate stress of buried natural gas pipeline have been developed. The stress is calculated by the equations and extrapolation of the graph resulted from FEM. The full paper is consist of series I and II. In this paper, series I, the calculating equation of the program is explained in detail.
Development of the computer program calculating the stress induced by various loads for buried natural gas pipeline (II)
Bang I.W. ; Kim H.S. ; Yang Y.C. ; Kim W.S. ; Oh K.W. ;
Journal of the Korean Institute of Gas, volume 2, issue 2, 1998, Pages 26~33
The thickness of buried gas pipeline is determined mainly with internal pressure and location factor according to the requirements of ANSI B3l.8. But the stress of buried gas pipeline is determined by not only internal stress but also external loads. The change of burying and environmental conditions, therefore, may result in increasing stress of pipeline. In order to avoid the decrease of safety degree resulting from change of environmental condition, the evaluation of stress level shall be necessary. The reliable equations have been developed for calculating stress of buried pipeline from internal pressure, earth load, vehicle load, ground subsidence. But they are very difficult to understand and use for non-specialist. For easy calculation of non-specialist, the new computer program to calculate stress of buried natural gas pipeline have been developed. The program can calculate maximum stress resulted from earth load, vehicle load, thermal load, four type ground subsidence. The stress is calculated by the equations and extrapolation of the graph resulted from FEM. In this paper, as the series of paper I, the operating method and the functions of the program is explained.
A Study on the Microstructure and Mechanical Properties for the Weldment with Variation of Welding Process of the API 5L-X42 Pipeline for Natural Gas Transmission.
Baek Jong-Hyun ; Kim Cheol-Man ; Kim Young-Pyo ; Kim Woo-Sik ;
Journal of the Korean Institute of Gas, volume 2, issue 2, 1998, Pages 34~39
Demand of the clean and convenient natural gas has continuously increased with recognizing of the environment problem since liquefied natural gas was introduced in Korea. Clean fuel natural gas was supplied to each city through high tensile strength pipeline connected by welding. Grades of pipeline were divided into the high and middle pressure according to supply pressure. Pipeline was welded mainly SMA welding process due to its easy handling, the other welding process was adopted according to the constructing condition. We were examined on the microstructure variation and mechanical properties of weld metal for high pressure pipeline, API 5L X-42.
Effects of Ni and Rh on the Structural Changes in Synthesis of the Spinel Type
Park Young Goo ;
Journal of the Korean Institute of Gas, volume 2, issue 2, 1998, Pages 40~47
This study describes a synthesis of spinel-type
for decomposition of carbon dioxide, using
and NaOH, at
for 20 h. with change of their chemical equivalent ratio from 0.50 to 0.75, 1.00, 1.25 and 1.50, respectively. Addition of 0.1-1.00 mole percentage
to the particles of
, Prepared by reacting chemical equivalent ratio 1.00, afforced spinel
. The structure of
was investigated with XRD and SEM, respectively.
Development of Safety Management Information System for Gas Industries Using Database
Um Sung-In ; Kim Sung-Bin ; Kim Yun-Hwa ; Baek Jong-Bae ; Kim In-Won ; Ko Jae-Wook ;
Journal of the Korean Institute of Gas, volume 2, issue 2, 1998, Pages 48~54
In this study a computerized prototype system was developed with Safety Management Information System(SMIS version 1.0) as a main system and database as subsystems to handle information. Safety management information consists of management aspects and technical elements, but SMIS consists of 4 modules of technical elements to interrelate safety technologies closely. SMIS enables gas industries to manage process safety information effectively and to evaluate hazards. The results from SMIS can be used to the operation manual and the emergency plan. Data base consists of 3 modules of accident data, material data, and equipment data to support SMIS. Also, the case study results proved the usefulness of SMIS for searching and accumulating process safety data. Especially, MIS which has the database suggests a formal structure for scattered raw safety data in gas industries and brings reduction of man power and time.
The Measurement of Minimum Ignition Energy and Explosion Limit for Pine Tree Dust
Choi Il-Gon ; Cho Il-Keon ; Mok Yun-Soo ; Lee Dong-Hoon ; Choi Jae-Wook ; Ha Dong-Myeong ;
Journal of the Korean Institute of Gas, volume 2, issue 2, 1998, Pages 55~60
In this study, we investigated the dust explosion characteristics by determining minimum ignition energy and explosion limit for this experiment, we used pine-tree dust which was used widely for the filler of thermosetting resin. The experiment was accomplished according to the variation of discharge gap, dust concentration, particle size and humidity. The result of this experiment are as follows; (1) The relation between the discharge gap and ignition energy was that ignition energy decreased according as the discharge gap became small, but increased when the discharge gap was below 4mm and suddenly became infinite when the discharge gap was below. So, we knew that this infinite value was limit discharge gap. (2) When the dust concentration increase and the particle size became microscopic it was easy to explore and in the same particle size, if the humidity increase the minimum ingnition energy decreased.
Assessment of Gas Release Dispersion and Explosion in Pipeline
Jung In-Gu ; Yoo Sang-Bin ; Lee Su-Kyung ; Kim Lae-Hyun ;
Journal of the Korean Institute of Gas, volume 2, issue 2, 1998, Pages 61~69
The risk assessments for gas leak in underground pipeline are conducted about the explosion accident of AHYUN-DONG underground service-base on December, 1994(Gaussian gas, LNG) and the accident of TAEGU subway on April 1995(Heavy gas LPG). We have calculated the total mass of gas release and have respected the efficient of explosions with report of the spot. The dispersion zones of LNG were calculated as large as fifteen times to those of LPG by ALOHA. The effects of thermal radiation from LNG explosion were assumed less than that from LPG by PHAST.