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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean Society of Safety
Journal Basic Information
Journal DOI :
The Korean Society Safety
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Volume & Issues
Volume 31, Issue 3 - Jun 2016
Volume 31, Issue 2 - Apr 2016
Volume 31, Issue 1 - Feb 2016
Selecting the target year
Application of FDS for the Hazard Analysis of Lubricating Oil Fires in the Air Compressor Room of Domestic Nuclear Power Plant
Han, Ho-Sik ; Hwang, Cheol-Hong ; Baik, Kyung Lok ; Lee, Sangkyu ;
Journal of the Korean Society of Safety , volume 31, issue 2, 2016, Pages 1~9
DOI : 10.14346/JKOSOS.2016.31.2.1
The standard procedure of fire modeling was reviewed to minimize the user dependence, based on the NUREG-1934 and 1824 reports. The hazard analysis of lubricating oil fires in the air compressor room of domestic nuclear power plant (NPP) was also performed using a representative fire model, FDS (Fire Dynamics Simulator). The area (
) and location of fire source were considered as major parameters for the realistic fire scenarios. As a result, the maximum probability to exceed the thermal damage criteria of IEEE-383 unqualified electrical cables was predicted as approximately 70% with
. It was also found that for qualified electrical cables, the maximum probabilities of exceeding the criteria were 2% and 90% with
, respectively. It was concluded that all electrical cables should be replaced with IEEE-383 qualified cables and the dike to restrict as
should be installed at the same time, in order to assure the thermal stability of electrical cables for lubricating oil fires in the air compressor room of domestic NPP.
Analysis of Risk Priority Number for Grid-connected Energy Storage System
Kim, Doo-Hyun ; Kim, Sung-Chul ; Park, Jeon-Su ; Kim, Eun-Jin ; Kim, Eui-Sik ;
Journal of the Korean Society of Safety , volume 31, issue 2, 2016, Pages 10~17
DOI : 10.14346/JKOSOS.2016.31.2.10
The purpose of this paper is to deduct components that are in the group of highest risk(top 10%). the group is conducted for classification into groups by values according to risk priority through risk priority number(RPN) of FMEA(Failure modes and effects analysis) sheet. Top 10% of failure mode among total potential failure modes(72 failure modes) of ESS included 5 BMS(battery included) failure modes, 1 invert failure mode, and 1 cable connectors failure mode in which BMS was highest. This is because ESS is connected to module, try, and lack in the battery part as an assembly of electronic information communication and is managed. BMS is mainly composed of the battery module and communication module. There is a junction box and numerous connectors that connect these two in which failure occurs most in the connector part and module itself. Finally, this paper proposes RPN by each step from the starting step of ESS design to installation and operation. Blackouts and electrical disasters can be prevented beforehand by managing and removing the deducted risk factors in prior.
Predicting of Ignition Time and Critical Distance for Ignition of Douglas fir by Radiant Heat of Incandescent Lamp
Lee, Heung-Su ; Kim, Doo-Hyun ;
Journal of the Korean Society of Safety , volume 31, issue 2, 2016, Pages 18~25
DOI : 10.14346/JKOSOS.2016.31.2.18
The incandescent lamp is an electric light fixture with a tungsten filament heated to a high temperature, by passing an electric current through it, until it glows with visible light. The hot filament is protected from oxidation with a glass bulb that is filled with inert gas. The incandescent lamp has fire risk when combustible materials are close to its glass bulb. Because its lamp has the property which converts 90~95 percents of the electric power to heat energy. 2015 national fire statistics show that fires caused by lighting fixtures were 652 cases, and incandescent lamps(44 cases) and halogen lamps(53 cases) accounted for 15 percents in those of high heating light fixtures. Since incandescent lamp fires account for about 45 percents in the high heating light fixture, we could not overlook the fire risks by the incandescent lamp. Although many studies related with those have been conducted, incandescent lamp fires are continuously occurred. This study was carried out to study the fire risk of ignition of wood due to radiant heat of incandescent lamp. Radiant heat flux of the incandescent lamp was predicted by applying point source model, and critical distance for ignition of wood was calculated by applying integral model. The results from this study could applied to fire prevention activities related to light bulb, and it could be used in fire cause investigations related to radiant heat of incandescent lamp.
Analysis of LPG Facility Siting Considering BLEVE
Kim, Taebeom ; Lee, Kyounglim ; Lee, Juhee ; Jung, Seungho ; Lee, Kunmo ;
Journal of the Korean Society of Safety , volume 31, issue 2, 2016, Pages 26~32
DOI : 10.14346/JKOSOS.2016.31.2.26
In previous studies on LPG siting in Korea, the scope have not included the probability of the secondary events of adjacent LPG tanks or structures from an explosion source. Therefore, it is essential to first identify the phenomenon which can be caused by BLEVE and then, properly assess their effects to each target including secondary event. In this study, we calculated the effects from a potential BLEVE of 15 ton LPG tank causing damages of storage tanks (LPG), structures and human using Phast ver. 6.7 and then suggested three risk zones (Zone I, II, III) assuming the consequences such as overpressure, heat radiation and missile effect by fragments. Zone I and II are divided at the line of 50% occurrence of the secondary event. Zone II and III are divided by Individual Risk(IR). The zone approach in this study can be used for more effective and safer Land Use Planning (LUP) for the future.
A Study on Dispersed Media Formation of Hydrocarbon Fuel by an Explosive Burster
Yoo, Jae Hun ;
Journal of the Korean Society of Safety , volume 31, issue 2, 2016, Pages 33~40
DOI : 10.14346/JKOSOS.2016.31.2.33
Liquid fuel can be easily exploded and release more energy of detonation than conventional explosives because it has different explosion mechanism. In order to analyze dispersion characteristics of liquid fuel for the safety purpose, two tests are conducted. First, pre-test, which is a computer simulation, is carried out by a software called ANSYS AUTODYN to eliminate the effect of a canister that usually causes irregular dispersion of the fuel. Second, field test is performed to find out the amount and density effect of bursting charge. High speed cameras are installed in front of the canister to visualize the mechanism. Velocity, area and radius of the dispersed cloud are measured by image processing software, these are shown that the amount of bursting charge affects cloud velocity and area but density is not a significant factor of cloud formation.
Development of the Damage Investigation Item to Debris Flow using the Delphi Method
Byun, Yo Seph ; Kim, Min Gi ; Park, Kyung Han ; Oh, Tae Keun ; Seong, Joo Hyun ;
Journal of the Korean Society of Safety , volume 31, issue 2, 2016, Pages 41~48
DOI : 10.14346/JKOSOS.2016.31.2.41
Recently, the frequency and intensity of localized heavy rain and typhoon due to the abnormal climate has increased, and especially the damage by an avalanche of earth and rocks similar to the landslide of Umyeon Mountain has become a social issue. However, the standardized damage investigation method doesn't yet exist, so the systematic analysis of the data has not been carried out. In this regard, this study developed assessment items to conduct standardized damage investigation of debris flow. To achieve this, preliminary assessment items were derived from analysis of literature review and the Delphi technique of 12 experts who are engaged in research facility, academia and industry was conducted. As a result, 29 assessment items which can be classified into 6 groups were determined. Surveying the relevant hand-on workers, details assessment items in each group were determined by exploratory factor analysis and reliability analysis.
Analysis of Characteristic of Debris Flow with Angle of Slope
Lee, Jun Seon ; Song, Chang Geun ; Lee, Seung Oh ;
Journal of the Korean Society of Safety , volume 31, issue 2, 2016, Pages 49~56
DOI : 10.14346/JKOSOS.2016.31.2.49
In Korea, there exist many mountains, and sudden storms occur during the summer season. When severe rainstorm events occur in steep slope topography, risk of debris flow is increased. Once debris flow occurs in urban area, it may cause casualties and physical damages due to rapid debris flow velocity along a steep slope. Accordingly, preventing method of sediment-related disaster for demage mitigation are essential. Recently, various studies on debris flow have been conducted. However, the prediction of the physical propagation of debris flow along the steep slope was not thoroughly investigated. Debris flow is characterized by various factors such as topography, properties of debris flow, amount of debris flow. In the study the numerical simulation was focused on the topographic factor. Fundamental analysis of the risk area was implemented with emphasis on the propagation length, thickness, and the development of maximum velocity. The proposed results and the methodology of estimating the structural vulnerability would be helpful in predicting the behavior and the risk assessment of debris flow in urban area. These results will be able to estimate the vulnerability of urban areas affected the most damage by debris flow.
A Study on the Stability of Existing Subway Tunnel due to Construction of New Underpass
Chung, Jee-Seung ; Choi, Jae-Young ; Lee, Jin-Hyuk ;
Journal of the Korean Society of Safety , volume 31, issue 2, 2016, Pages 57~63
DOI : 10.14346/JKOSOS.2016.31.2.57
Recently, subways in the city are formed a vast underground network which is interfered with construction when large-scale infrastructure will be planned to nearby existing subway tunnels. Researches have been restricted to estimate stability of existing subway tunnel due to adjacent excavation causued by small construction such as buildings. In this paper, OO underpass is planned on the top of existing subway tunnel, which will be need large-scale excavation, is selected as a subject of study. And the purpose of this study is to analyze the effects on existing subway tunnel due to excavation by stages on construction of underpass. The 3D-numerical analysis was performed by using the MIDAS/GTS program. The stability on existing subway tunnel caused by sequential excavation is analysed using numerical results. Based on the analysis, the excavation orders and reinforcement methods was suggested for stability of exiting subway tunnel.
The Evaluation of Structural Stability of Corrugated Steel Plate Method applied in High-Speed Railway Vertical Tunnel Structures
Chung, Jee-Seung ; Shin, Hwa-Cheol ; Kim, Jin-Gu ;
Journal of the Korean Society of Safety , volume 31, issue 2, 2016, Pages 64~69
DOI : 10.14346/JKOSOS.2016.31.2.64
In this paper, structural analysis of High-Speed railway vertical tunnel structures was performed to verify the structural stability. The corrugated steel plate method was applied to the vertical tunnel structures for its simple construction method and low cost. The structural stability of Wall, Connection and Storage section was performed with LRFD and ASD design method at joint part, buckling, stress and plastic hinge. From the results, all of vertical tunnel structures shown the structural stability regardless of design method and structure types. So, the application of corrugated steel plate in vertical tunnel structures instead of cast-in-placed concrete was quite enough.
Experimental Study of Shape and Pressure Characteristics of Solitary Wave generated by Sluice Gate for Various Conditions
Cho, Jae Nam ; Kim, Dong Hyun ; Lee, Seung Oh ;
Journal of the Korean Society of Safety , volume 31, issue 2, 2016, Pages 70~75
DOI : 10.14346/JKOSOS.2016.31.2.70
Recently, coastal erosion has been widely in progress and the erosion level becomes also serious in the world wide, espeically in East Sea in Korea. Since it would threaten the life, economics and security risk, it is necessary to much comprehend the reason why coastal erosion has occurred according to the geographical characteristics. Meanwhile, analysis about hydrodynamics of the solitary wave such as tunami in swash zone is needed for the best management practice of coastal erosion. Solitary wave is nonlinear wave and can be reproduced in the laboratoy scale by openning suddenly a sluice gate with water head difference, of which methodology was found in the literature, since it could be simply determined by a significant wave height. Thus, in this sutdy the generation of solitary wave was experimentalized using the sluice gate. Experimental conditions were classified by angles of a beach slope, a water level in a beach slope and a difference of water level between in a headtank and a channel bed. Two kinds of dimensionless analyses based from experimental results in this study were presented; the first analysis indicates nondimensionalization between the wave height and the water level in a beach slope in order to investigate characteristics of solitary wave approaching the beach. The second shows the other nondimensionalization between dynamic pressure and static pressure on a beach slope to investigate the relationship between wave breaking and wave pressure. Under the same conditions as laboratory experiments, the numerical results computed with a SWAN model embedded in FLOW 3D were compared in terms of wave height, and pressure on the beach slope, which shows good agreement with each other. Overall results from this study could provide fundamental hydraulic data for the reliabile verification of numerical simulation results about coastal erosion in swash zone caused by solitary waves.
Analysis of Initial Mass Distribution and Facility Shape to Determine Structural Alternative for Hazardous Zone Vulnerable to Debris Flow Disaster
Seong, Joo-Hyun ; Oh, Seung Myeong ; Jung, Younghun ; Byun, Yoseph ; Song, Chang Geun ;
Journal of the Korean Society of Safety , volume 31, issue 2, 2016, Pages 76~82
DOI : 10.14346/JKOSOS.2016.31.2.76
A 2-D hydrodynamic model for predicting the movement of debris flow was developed. The developed model was validated against a dam break flow problem conducted in EU CADAM project, and the performance of the model was shown to be satisfactory. In order to suggest structural alternative for hazardous zone vulnerable to debris flow disaster, two types of initial mass distribution and two shapes of defensive structure were considered. It was found that 1) the collapse of debris mass initiated with square pyramid shape induced more damage compared with that of cubic shape; and 2) a defensive structure with semi-circular shape was vulnerable to debris flow disaster in terms of debris control or primary defense compared with that of rectangular-shaped structure.
A Simulation Case Study on Impact Safety Assessment of Roadside Barriers Built with High Anti-corrosion Hot-dip Alloy-coated Steel
Noh, Myung-Hyun ;
Journal of the Korean Society of Safety , volume 31, issue 2, 2016, Pages 83~89
DOI : 10.14346/JKOSOS.2016.31.2.83
As the world's industrial development quickens, the highways and regional expressways have been expanding to serve the logistics and transportation needs of people. The burgeoning road construction has led to a growing interest in roadside installations. These must have reliable performance over long periods, reduced maintenance and high durability. Steel roadside barriers are prone to corrosion and other compromises to their functionality. Therefore, using high anti-corrosion steel material is now seen as a viable solution to this problem. Thus, the objective of this paper is to expand the scope of applications for high anti-corrosion steel material for roadside barriers. This paper assesses the impact safety such as structural performance, occupant protection performance and post-impact vehicular response performance by a simulation review on roadside barriers built with high strength anti-corrosion steel materials named as hot-dip zinc-aluminium-magnesium alloy-coated steel. The simulation test results for the roadside barriers built with high strength anti-corrosion steels with reduced sectional thickness meet the safety evaluation criteria, hence the proposed roadside barrier made by high strength and high anti-corrosion hot-dip zinc-aluminium-magnesium alloy-coated steel will be a good solution to serve safe impact performance as well as save maintenance cost.
A Study on the Risk Assessment Method of Indoor-Impulsive Noise
Chung, Sung Hak ; Song, Ki Hyeok ;
Journal of the Korean Society of Safety , volume 31, issue 2, 2016, Pages 90~97
DOI : 10.14346/JKOSOS.2016.31.2.90
The objective of this study is to evaluate the operator's safety for the risk assessment method of impulsive noise division. Literature reviews on the basis of the impulsive noise study, the measuring methods and procedures, based on the results of the analysis process presents a risk assessment methods. In this study, analysis of the MIL-STD-1474D, B-duration graph for the peak noise level to cross the line from the measurement results is limited by the risk retracted. It is possible to determine whether there is quick can be determined whether the risk. Measurement positions measured by the microphone is installed on the risk of applying results are so located within the tolerance impulsive noise in the measurement position can interpret subjective safety is ensured. In addition, Proportional Dose technology was the proposed by the Patterson with the risk assessment method was applied to the indoor-impulsive noise. As results of this study, results for the same value of applying the technique of Proportional Dose technology results calculated by MIL-STD-1474D methods allows 1 count once increased in comparison to the result obtained.
A Study on The Risk Level of Work Types in Urban Railway Construction
Lee, Jong-Bin ; Han, In-Kuk ; Chang, Seong Rok ;
Journal of the Korean Society of Safety , volume 31, issue 2, 2016, Pages 98~103
DOI : 10.14346/JKOSOS.2016.31.2.98
The goals of this study were to investigate some significant factors to judge level of safety at urban railway construction field and to analyze degree of risk by work classification. Currently, there are lots of construction fields for the urban railway for national transportation, and our government also planned constructing more urban railway in near future. However, most of the researches on safety neglected the degree of risk factors on the urban railway construction field. Safety managers participated in the brainstorming session for deriving decision criteria of the degree of risk (i.e., significant factors). Then, they were asked to answer a structured questionnaire which was developed for deriving most important factors. Finally, the analytic hierarchy process (AHP) was used to analyze level of risk by work classification. The following results were obtained. First, total twelve factors judging degree of risk were found in the brainstorming session. Second, the questionnaire showed four significant factors, including adjacency of obstacle, intensity of work, unsafe condition and work space. Third, the results of AHP showed civil work is the most dangerous work among 6 work types. The results could be used to give the safety management priority on accident prevention efforts among several hazards and to reduce degree of risk in construction field of the urban railway.
Strategies to Improve Functional Competency and Effectively Respond to Environmental Changes of Environment, Health and Safety (EHS) Team in Companies
Kim, Myung Jung ; Park, Sun-Kyoung ;
Journal of the Korean Society of Safety , volume 31, issue 2, 2016, Pages 104~111
DOI : 10.14346/JKOSOS.2016.31.2.104
Our nation has experienced remarkable growth over the half a century. Nonetheless, there is still much room for improvement in the area of Environment, Health and Safety (EHS). In particular, frequency and severity of industrial accidents did not considerably improve compared to the economic and social progress we made. The main objective of this research is to analyze what plans and actions are required for companies to promote industrial safety by 1) fostering functional competencies of EHS staffs and 2) effectively and proactively responding to rapidly changing EHS environment. For this research, EHS staffs from five large companies in Korea were surveyed. Most respondents indicated that one of key expertise required by EHS staffs is capabilities to effectively deal with changes to various domestic and international EHS-related laws and regulations. Furthermore, a predominant number of respondents commented that it is imperative for EHS staffs to have a broad knowledge of business management. As for internal issues that EHS staffs encounter within their organizations, many pointed out that their EHS vision is not sufficiently shared throughout the organization, and that the rules of leadership are critical in solving this issue. On the other hand, the survey respondents also raised an issue of limited EHS-related investments due to slow economy. As a solution, they proposed ways to align EHS organization's performance with the company's performance. Based on this survey, issues and solutions for EHS organizations were identified. Results of this research can benefit companies that plan to newly establish or further expand EHS organization.
The Study of Preventive Improvement on Employment Type and Occupational Safety & health Activity in the Very Small Service Industry
Yi, Kwan Hyung ;
Journal of the Korean Society of Safety , volume 31, issue 2, 2016, Pages 112~118
DOI : 10.14346/JKOSOS.2016.31.2.112
The labor force has moved to services industry. An industrial accidents of service industry is three people on 10 persons in 2013. This research conducted questionnaire surveys of 1:1 directly person interviews with a structured questionnaire intended for 150 service workplaces, in order to improve occupational safety and health in very small service workplace with less than 5 employee. The survey contents is employment type, safety and health management system, safety and health training, activities. In the results, working with non-regular(informal) workers is two people on 10 persons 27.1% and female workers is about five people on 10 persons with 58.1%, and that 67.9% of non-regular workers who are mainly engaged in the production line appeared. And the work-related injury and accident experience was 3.3% and the occupational injury rate was 1.02%, especially occupational injury rate of female workers was 0.88%. Workplace risk assessment carried out in response that it was very low as 10.0% of the total. Also the safety & health education and activities was very low. Thus the safety consciousness and education is urgently required in order to prevent the industrial accidents.
Gale Disaster Damage Investigation Process Provement Plan according to Correlation Analysis between Wind Speed and Damage Cost -Centering on Disaster Year Book-
Song, Chang Young ; Yang, Byong Soo ;
Journal of the Korean Society of Safety , volume 31, issue 2, 2016, Pages 119~126
DOI : 10.14346/JKOSOS.2016.31.2.119
Across the world, the industrialization has increased the frequency of climate anomaly. The size of damage due to recent natural disasters is growing large and fast, and the human damage and economic loss due to disasters are consistently increasing. Urbanization has a structure vulnerable to natural disasters. Therefore, in order to reduce damage from natural disasters, both hardware and software approaches should be utilized. Currently, however, the development of a statistical access process for 'analysis of disaster occurrence factor' and 'prediction of damage costs' for disaster prevention and overall disaster management is inadequate. In case of local governments, overall disaster management system is not established, or even if it is established, unscientific classification system and management lead to low utility of natural statistics of disaster year book. Therefore, in order to minimize disaster damage and for rational disaster management, the disaster damage survey process should be improved. This study selected gale as the focused analysis target among natural disasters recorded in disaster year book such as storm, torrential rain, gale, high seas, and heavy snow, and analyzed disaster survey process. Based on disaster year book, the gale damage size was analyzed and the issues occurring from the correlation of gale and damage amount were examined, so as to suggest an improvement plan for reliable natural disaster information collection and systematic natural disaster damage survey.
Development of Categorization System for Efficient Calculation of Damage Cost according to Strong Wind
Song, Chang Young ; Lee, Jong Hoon ;
Journal of the Korean Society of Safety , volume 31, issue 2, 2016, Pages 127~132
DOI : 10.14346/JKOSOS.2016.31.2.127
In this study, the plan to construct a disaster information categorization system that can be objectively and efficiently performed was suggested in order to perform disaster management task systematically. Recently, the damage of natural disasters is gradually growing larger and faster, increasing the economic loss. Especially, as for the domestic storm damage, the damage from strong wind was found to be greater than the damage from torrential rain. Also, strong wind was found to be inflicting a great damage on human life, property and agricultural crops, so the necessity to study damage restoration from strong wind is increasing. Nevertheless, the damage items categorized in the domestic disaster year book are often comprehensive or unclear in criteria, and thus fail to reflect items or matters due to actual disaster damage. It is difficult to aggregate damage accurately such that it does not correspond to the national compensation scope or the damage amount is calculated according to subjective judgment of the investigator in charge. As such, if the disaster information management is inadequate by not applying accurate categorization criteria from damage amount calculation, there can be an issue with fairness when paying the damage support aid. Therefore, this study suggested a categorization plan for objective and efficient execution of disaster information management task in order to resolve such issues. It is expected that quick and efficient execution would be possible in disaster information management and task procedure domestically by constructing systematic categorization system related to disaster information.
A Qualitative Study on Safety Rule Violation Motives at Manufacturing Plants
Hong, In-gie ; Baek, Jong-bae ;
Journal of the Korean Society of Safety , volume 31, issue 2, 2016, Pages 133~142
DOI : 10.14346/JKOSOS.2016.31.2.133
The purpose of this study was to investigate the factors that influence safety rule violation at work. Semi-structured interviews were conducted with 337 participants from nine manufacturing plants. The results of the content analysis revealed the following six categories: Individual characteristics, safety commitment, safety support and resources, safety competence and communication, production pressure, and problems with rules. Among the 14 factors in the six categories above, indirect accident experience in the individual characteristics category and no action for complying with laws in the problems with rules category had not been identified in previous studies. However, some factors, such as age, peer pressure, pay type, the lowering of risk, a masculine way of working, and supervisor position were not found in this study. The implications and limitations are discussed.