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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean Institute of Gas
Journal Basic Information
Journal DOI :
The Korean Institute of GAS
Editor in Chief :
Volume & Issues
Volume 14, Issue 6 - Dec 2010
Volume 14, Issue 5 - Oct 2010
Volume 14, Issue 4 - Aug 2010
Volume 14, Issue 3 - Apr 2010
Volume 14, Issue 2 - Apr 2010
Volume 14, Issue 1 - Feb 2010
Selecting the target year
A Study on Analysis of Laboratory Accident with Root Cause Analysis
Eom, Seok-Hwa ; Lee, Su-Kyung ;
Journal of the Korean Institute of Gas, volume 14, issue 4, 2010, Pages 1~5
Many sorts of fatal accidents like explosion or fire caused by gas leakage have become a social issue with the increasing use of harmful chemicals in laboratories in universities and enterprise-affiliated research institutes in Korea. Importance of safety management has been emphasized and it made Act on the Establishment of Safe Laboratory Environment enacted not only to protect lives and bodies of people working in laboratories in universities and enterprise-affiliated research institutes but also to make pleasant experimental atmosphere. Safety management system has been built and periodical checkups and safety diagnosis have been implementing in universities and enterprise-affiliated research institutes to prevent such accidents. However, in spite of those actions, continuous accidents make analysis of root cause essential. This study will show results of analysis on incidents and accidents occurred in laboratories in universities and enterprise-affiliated research institutes using Root Cause Analysis Method and propose the direction of safety management.
A Study on Development of Root Cause Analysis Map In Laboratory
Eom, Seok-Hwa ; Lee, Su-Kyung ;
Journal of the Korean Institute of Gas, volume 14, issue 4, 2010, Pages 6~11
The continuous fatal accidents like explosion or fire cause huge losses of both life and property in laboratories even though safety management system has been built and periodical checkups and safety diagnosis have been implementing in universities and enterprise-affiliated research institutes since Act on the Establishment of Safe Laboratory Environment was enacted in 2005 to prevent accidents in research laboratories. Cause analysis and safety management measures to prevent recurrence of accidents are urgently needed because accidents in research laboratories occur repeatedly with similar contents. This study will show results of analysis on incidents and accidents occurred in laboratories in universities and enterprise-affiliated research institutes using Root Cause Analysis Method and propose classified map of cause investigation and improvements so as to improve safety management in research laboratories.
A Study on Lean Combustion Characteristics with Hydrogen Addition in a Heavy Duty Natural Gas Engine
Park, Cheol-Woong ; Kim, Chang-Gi ; Choi, Young ; Won, Sang-Yeon ;
Journal of the Korean Institute of Gas, volume 14, issue 4, 2010, Pages 12~17
Natural gas is one of the most promising alternatives to gasoline and diesel fuels because of its high thermal efficiency and lower harmful emissions, including
. However, the possibility of partial burn and misfire makes the benefits of natural gas fueled engine worse under lean burn operation condition, Hydrogen addition can promote the combustion characteristics while reduces emissions extremely. In this study, the effect of hydrogen addition on an engine performance was investigated. The results showed that thermal efficiency was increased due to the expansion of lean operation range under stable operation. NOx emission can be significantly reduced with the small increase in HC or CO emissions.
Risk Reduction Rate for Each Risk Mitigation Measure on High Pressure Urban Gas Pipelines Proposed by Quantitative Risk Analysis
Ryou, Young-Don ; Jo, Young-Do ; Park, Young-Gil ; Lee, Su-Kyung ;
Journal of the Korean Institute of Gas, volume 14, issue 4, 2010, Pages 18~23
After conducting QRA(quantitative risk assessment) for the high pressure urban gas pipelines planned to be installed, RMMs(risk mitigation measures) when the societal risk is outside the acceptable region have been derived in this paper. Also risk reduction rates are calculated for each RMM. As a result of QRA, we find out that damaged distance caused by radiational heat is largely dependent upon the wind velocity and the atmospheric stability. The measure that has the highest risk reduction effect is No. 10 which includes pipeline corrosion monitoring, MOV(motor operated valve) installation and the method to protect pipeline damage caused by third-party mechanical interference, and which shows 75 % of risk reduction effect.
Characteristics of Auto-ignition for Trichlorosliane and Dichlorosilane-Trichlorosliane Mixtures
Ha, Dong-Myeong ;
Journal of the Korean Institute of Gas, volume 14, issue 4, 2010, Pages 24~30
An accurate information of the autoignition temperature(AIT) is important in developing appropriate prevention and control measures in industrial fire. This study measured the AITs of trichlorosliane and dichlosilane(DCS)-trichlorosliane(TCS) mixtures by using ASTM E659-78 apparatus. The experiment AITs of trichlorosliane, TCS(90wt%)-DCS(10wt%) and the TCS(70wt%)-DCS(30wt%) were
A Simplified Method for Predicting Failure Probability of Pipelines with Corrosion Defects
Lee, Jin-Han ; Kim, Young-Seob ; Kim, Lae-Hyun ;
Journal of the Korean Institute of Gas, volume 14, issue 4, 2010, Pages 31~36
An alternative method is presented for predicting failure probability of pipelines with corrosion defects in this paper. The failure of corroded pipeline occurs when the operating pressure is grater than the remaining strength of the pipeline, and a limit state function can be defined as the differences between the remaining strength and the operating pressure. Then, based on structural reliability theory, we can estimate the failure probability of corroded pipeline, which is dependent on elapsed time of the pipeline with active corrosion defects. In this study, a root finding (RF) method has been adopted to solve the limit state function instead of Monte-Carlo simulation (MCS) method which traditionally has been employed to solve those kinds of problems. The calculation results shows that there are only small differences between the RF and the MCS method but the RF has higher efficiency in calculation than the MCS.
Analysis of Likelihood of Failure for the Thinning of Hydrochloric Acid Corrosion through Risk-Based Inspection using API-581 BRD
Lee, Hern-Chang ; Jo, Ji-Hoon ; Shin, Dong-Il ; Kim, Tae-Ok ;
Journal of the Korean Institute of Gas, volume 14, issue 4, 2010, Pages 37~44
To propose a cause analysis method of pressurized facilities, a likelihood of failure (LOF) for the thinning module by hydrochloric acid corrosion was analyzed through the risk-based inspection (RBI) using API-581 BRD. For this investigation, the technical module subfactor (TMSF), as a main factor of the LOF, was estimated, and the effects of parameters on the TMSF were analyzed quantitatively. As a result, we found that the TMSF increased with increasing chloride ion concentration and temperature, but it decreased with increasing thickness of the facilities, inspection number and inspection effectiveness. Also, the TMSF showed a relatively low value for the monitoring system implemented and the overdesign factor>1.5. In this condition, the TMSF changed sensitively with the inspection number, the inspection effectiveness and the overdesign factor, and its magnitude varied with the monitoring system.
Effect of Geometry Variation on Plastic Collapse of Marine Pipeline
Baek, Jong-Hyun ; Kim, Woo-Sik ;
Journal of the Korean Institute of Gas, volume 14, issue 4, 2010, Pages 45~50
The marine pipelines laid in deep waters were evaluated to verify the resistance on the plastic collapse to heavy ambient external pressure due to hydrostatic pressure. In this study, the plastic collapse behavior of the marine pipe subjected to hydrostatic pressure was evaluated with the ovality and ratio of diameter to thickness in FE analyses. A parametric study was shown that the internal pressure increased the plastic collapse depth by increasing of the resistance to the plastic collapse. It was also shown that the collapse depth of the pipeline having a local ovality was deeper than that of the pipeline having a global ovality. Finally, the plastic collapse depth decreased when either the ratio of diameter to thickness or the ovality increased.
The Study of KOGAS DME Process in Small and Medium Sized Gas Field Containing
Mo, Yong-Gi ; Cho, Won-Jun ; Song, Taek-Yong ; Baek, Young-Soon ;
Journal of the Korean Institute of Gas, volume 14, issue 4, 2010, Pages 51~55
The global activities to reduce the
emission as a greenhouse gas have been various efforts. Under this circumstance, small and medium sized gas field containing
to develop as LNG is not economic feasibility. Particularly, for the separation of
in gas field, separation facilities should be installed to add. This is and increase in plant construction cost and separated
emission into the atmosphere is not the result of greenhouse gas reduction. When the uneconomic gas field apply the KOGAS DME process, the gas field containing
can be increase economic feasibility because of natural gas and
can be use to resource gas. The Tri-reformer produced syngas as H2 and CO in KOGAS DME process and the resource gases are natural gas, steam, oxygen and
is used as raw material gases from recover
in DME process. In this study, we investigated range of application of
in gas field.
Failure Case Studies of Sensors for Electronic Controlled Engine in LPG Vehicle
Kim, Chung-Kyun ; Lee, Il-Kwon ;
Journal of the Korean Institute of Gas, volume 14, issue 4, 2010, Pages 56~62
The purpose of this paper analyzes and investigates the failure case studies of electronic control sensors for a LP gas engine. The malfunction of crank angle sensor, which controls a fuel injection volume of LP gas, displays an irregular and non-uniform pulse wave form. The pulse form, which is related to the noise of the crank angle sensor, displays at the rectangular peak with a saw-toothed shape and is intermittently generated with a level of 2.46V noise signal. The malfunction of No. 1 TDC sensor in which is caused from the internal disorder affects to the reduction of engine power and engine stop suddenly. If the malfunction of oxygen sensor is occurred due to a wiring problem of a sensor connector, the LP gas vehicle may produce a shaking and disharmony of an engine because of no signal supply from the oxygen sensor. The air cleaner replica produces the clogging of continuous supply of fresh air. This may cause the retardation of vehicle acceleration and engine disharmony intermittently.