• Journal of the Korean Institute of Gas
• /
• v.19 no.1
• /
• pp.45-50
• /
• 2015

This study is an analysis of characteristics and the causes of serious accidents in chemical industry. The statistical analysis was focused on preventive facilities, equipment failures, accident materials and instabilities of workers and employment type. First, it showed that the highest number of the victims of accidents were involved in the industry of chemical materials and chemical products among the investigation of the manufactural industries. Also, particularly, they were investigated to be focused on the occurrence of the serious accidents in preventive facilities. Secondly, the most of the victims of serious accidents were found out not to be temporary or part-time worker but regular workers and most of the accidents occur in the form of big accidents involving more than 4 workers.

• Fashion & Textile Research Journal
• /
• v.26 no.1
• /
• pp.110-122
• /
• 2024

This study aims to cultivate specialized professionals equipped with practical skills essential for compliance with textile environmental regulations and analysis of harmful substances. This is achieved through the revision and restructuring of educational programs targeting workers in the chemical analysis industry. To address this, a survey was conducted among chemical industry workers in small and medium-sized enterprises (SMEs) to gauge the demand for educational programs. Specifically, a survey was conducted among 240 SME workers who participated in the 2022 education curriculum to identify their educational needs and specific requirements in the field. The research findings indicate that the majority of SMEs recognize the necessity of education in the chemical field and express a strong willingness to engage in the curriculum. Particularly emphasized was the need to enhance practical skills crucial for compliance with chemical environmental regulations. Consequently, adjustments were made to the curriculum, reallocating time and increasing the duration of practical training. This enables trainees to directly operate analysis machines and interpret results. Additionally, in response to further educational demands reflected by survey participants, the curriculum was expanded from five to six courses, with adjustments made to existing educational programs. Based on these research outcomes, practical educational methods tailored to SME requirements are proposed, aiming to bridge the gap between regulatory compliance and industry needs.

• Particle and aerosol research
• /
• v.17 no.4
• /
• pp.133-148
• /
• 2021

This study aims to estimate the amount of air pollutants emitted from heavy industry facilities in North Korea. To compare the emission in 2017 from the heavy industry sector in North Korea with South Korea, the heavy industry sector was classified with the South Korean classification (Matching Heavy Industry sector) and air pollutant emissions by Matching Heavy Industry sector in North Korea were estimated. The CO, NO_x and SO_x emissions of Matching Heavy Industry sector in North Korea are 22%, 73%, and 31% of the emission in South Korea, respectively. The air pollutant emissions in the Matching Heavy Industry sector in North Korea for CO, NO_x and SO_x were 0.6%, 124%, and 24% of the total air pollutant emission in North Korea estimated from EDGAR, respectively. As for the distribution of emissions by administrative district of the Matching Heavy Industry sector in North Korea, NO_x was concentrated in the western part of North Korea, and CO and SO_x emissions were concentrated in Hamgyong-bukto.

• Nuclear Engineering and Technology
• /
• v.45 no.3
• /
• pp.295-310
• /
• 2013

Industry- or regulatory-sponsored research activities on the resolution of Generic Safety Issue (GSI)-191 were reviewed, especially on the chemical effects. Potential chemical effects on the head loss across the debris-loaded sump strainer under a post-accident condition were experimentally evidenced by small-scale bench tests, integrated chemical effects test (ICET), and vertical loop head loss tests. Three main chemical precipitates were identified by WCAP-16530-NP: calcium phosphate, aluminum oxyhydroxide, and sodium aluminum silicate. The former two precipitates were also identified as major chemical precipitates by the ICETs. The assumption that all released calcium would form precipitates is reasonable. CalSil insulation needs to be minimized especially in a plant using trisodium phosphate buffer. The assumption that all released aluminum would form precipitates appears highly conservative because ICETs and other studies suggest substantial solubility of aluminum at high temperature and inhibition of aluminum corrosion by silicate or phosphate. The industry-proposed chemical surrogates are quite effective in increasing the head loss across the debris-loaded bed and more effective than the prototypical aluminum hydroxide precipitates generated by in-situ aluminum corrosion. There appears to be some unresolved potential issues related to GSI-191 chemical effects as identified in NUREG/CR-6988. The United States Nuclear Regulatory Commission, however, concluded that the implications of these issues are either not generically significant or are appropriately addressed, although several issues associated with downstream in-vessel effects remain.

• Journal of the Korean Society of Industry Convergence
• /
• v.26 no.5
• /
• pp.765-774
• /
• 2023

The Ministry of Employment and Labor implemented the process safety management(PSM) system from 1996 to prevent major industrial accidents caused by chemical substances, but the number of accidents did not drastically decrease. Even in workplaces with excellent PSM ratings, large-scale chemical accidents still occur due to non-compliance with safety work procedures and insufficient safety measures during maintenance and other work. Accordingly, the chemical accident risk warning system was introduced in 2014 to supplement the PSM system and prevent accidents that may occur during regular or unexpected maintenance and repair work. In the meantime, changes in the safety management system have been checked since the introduction of the chemical accident risk warning system at chemical handling workplaces, and based on the results, a plan for upgrading this system has been proposed. The effect of the CARW system was found to directly prevent accidents through wired and on-site consulting and post-management at the workplace and indirectly contribute to the establishment of a safety and health management system at the workplace, such as improving safety culture awareness.

• Proceedings of the Korean Society of Toxicology Conference
• /
• 1998.10a
• /
• pp.29-35
• /
• 1998

• Proceedings of the KSME Conference
• /
• 2004.11a
• /
• pp.504-509
• /
• 2004

Chemical machining(CHM) is a special process which material removed by contact of strong etchant. The application as industrial process was started from aircraft industry after 2nd world war. Chemical milling, one of the CHM process, initially became commercial bussiness and it was called chem-mill. Even today, this process widely used to remove the material from aircraft wings and fuselage panel in aircraft industry. In this study, it is attempted to design the cylinder pattern which minimize the weight within the allowable stress using chemical milling.

• Proceedings of the Korea Technical Association of the Pulp and Paper Industry Conference
• /
• 2011.10a
• /
• pp.119-123
• /
• 2011

The application of flexo printed ONP and OCC leads to brightness decrease of deinked stock in ONP recycling system. The largest problems are due to accumulation of flexo ink & introduction of brown fibers. All these are emphasized by variations in the amount of flexo printed ONP and OCC in recovered ONP stock. Most of the brightness problems caused by flexo ink can be helped and solved by applying a proper polyelectrolytes as coagulation agent and flocculation agent. This requires exact evaluation of sedimentation or dissolved air flotation potentials of flexo ink and polyelectrolytes. Effect of bleaching chemical (H2O2) addition level on the increase of brightness of OCC included stock has been investigated by lab scale test.

• Journal of the Korean Society of Industry Convergence
• /
• v.12 no.1
• /
• pp.5-10
• /
• 2009

The Nylon/clay nanocomposite were prepared with Cloisite25A and Cloisite30B. And mechanical properties and thermal properties of Nylon/clay nanocomposites on the amount of MMT have been investigated. From the results of XRD and TEM, we found that mono layered silicates were dispersed in polymer matrix and those resultants were exfoliated nanocomposites. When Cloisite30B was used as an intercalant in the Nylon/Clay nanocomposites, the mechanical and thermal properties of Nylon were higher than those with Cloisite25A.

• Bulletin of the Korean Chemical Society
• /
• v.33 no.1
• /
• pp.83-89
• /
• 2012

Due to the potential importance and usefulness, usage of highly ordered nanoporous anodized aluminum oxide can be broadened in industry, when highly ordered anodized aluminum oxide can be placed on a substrate with controlled thickness. Here we report a facile route to highly ordered nanoporous alumina with the thickness of hundreds-of-nanometer on a silicon wafer substrate. Hexagonally or tetragonally ordered nanoporous alumina could be prepared by way of thermal imprinting, dry etching, and anodization. Adoption of reusable polymer soft molds enabled the control of the thickness of the highly ordered porous alumina. It also increased reproducibility of imprinting process and reduced the expense for mold production and pattern generation. As nanoporous alumina templates are mechanically and thermally stable, we expect that the simple and costeffective fabrication through our method would be highly applicable in electronics industry.