• Title/Summary/Keyword: 수소 누출

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Analytical method for combustible waste contaminated by the HF leakage from industrial process (산업공정에서 불산누출로 오염된 가연성 폐기물의 분석방법 연구)

  • Kang, Young-Yeul;Kim, Yong-Jun;Kim, Woo-Il;Yoon, Cheol-Woo;Yeon, Jin-Mo;Shin, Sun-Kyoung;Oh, Gil-Jong
    • Analytical Science and Technology
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    • v.27 no.3
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    • pp.167-171
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    • 2014
  • Hydrofluoric acid (HF), a typical inorganic acid, has been used in the industry for its various usage and classified as the toxic compound, because it can cause the pneumonia and pulmonary edema when it was exposed to respiratory organs. The official environmental analytical method for fluorine and its compound in waste has not been developed. For this reason, we have faced some problem to treat the contaminated wastes by the HF leakage from industrial process. In this study, prepared for analytical method for combustible waste (crop, trees, etc.) generated from HF leaking accident and to be applied as the official analytical method for fluorine contaminated waste when the fluorine and its compound will be regulated as a hazardous material by the waste management law later.

Measures to Secure Safety according to Gas pipe Hydrogen Mixing(Carbon Neutral) (가스배관 수소혼입(탄소중립)에 따른 안전확보 방안)

  • Kwak, Che-Sik;Sin, Dong-Il
    • Proceedings of the Korean Society of Disaster Information Conference
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    • 2022.10a
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    • pp.290-291
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    • 2022
  • 본 논문에서는 우리나라 2030년 국가 온실가스 감축목표(NDC*, 291백만톤 감축)달성 및 2050년 탄소중립 목표 달성을 위해 필연적으로 수반되는 천연가스 내 수소 혼입에 따른 안전성확보 방안과 수소혼입에 따른 국민 불안감 해소 및 수용성 제고를 위한 대안을 제시하고, 해외 사례를 연구 하였다. 탄소중립은 온실가스(이산화탄소 등)의 배출량을 최대한 줄이고, 남은 온실가스를 흡수, 제거해서 실질적인 배출량이 "0"이 되는 것을 의미하고, 수소혼입은 도시가스의 주성분인 메탄 연소시 발생하는 CO2를 최소화하기 위해 수소(H2)를 도시가스에 일정비율 혼합하는 것을 말한다. 본 연구에서는 수소 혼입 시 우려되는 수소취성 및 배관내구성 문제와 수소 특성인 작은 입자로 인한 누출 위험성, 고층에서 메탄과 수소가 분리되는 현상 등에 따른 문제를 도출하고 이에 대한 안전관리 방안도 함께 제시하였다. 또한, 도시가스 배관에 수소 혼입시 천연가스 대체를 통한 온실가스 감축 및 기존 배관망 사용을 통한 경제성 분석결과와 국가 온실가스 감축에 어느 정도 기영할 수 있는지도 함께 기술하였다.

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Effect of Frictional Resistance Force on a Liquid Pool Spreading Model with Continuous and Instantaneous Release (마찰저항이 연속누출과 순간누출을 가지는 액체 풀의 확산에 미치는 영향에 대한 해석적 연구)

  • Kim, Tae Hoon;Choi, Byung-Il;Kim, Myungbae;Do, Kyu Hyung;Han, Yong-Shik
    • Transactions of the Korean hydrogen and new energy society
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    • v.24 no.6
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    • pp.487-494
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    • 2013
  • In this study, solutions for a liquid pool spreading model with continuous and instantaneous release are discussed based on the model used in the FERC's report. The effects of the release time on the liquid pool volume and radius are investigated for the continuous release. For the continuous release with the frictional resistance force in the liquid pool spreading model, the vaporization time decreases as the release time increases. On the other hand, for the continuous release without the frictional resistance force in the liquid pool spreading model, the vaporization time increases as the release time increases. These phenomena are deeply related to the pool radius. In addition, the effects of the initial pool radius for the instantaneous release in the liquid pool spreading model are discussed. For the case with the frictional resistance force in the liquid pool spreading model, as reducing release time in the model with the frictional resistance force for the continuous release, the solution for a continuous release approaches to that for an instantaneous release. On the contrary to this, the pool volume and radius for the instantaneous release without the frictional resistance force are totally different from those for the continuous release without the frictional resistance force.

Investigation on the Technical Characteristics and Cases of Salt Cavern for Large-Scale Hydrogen Storage (대규모 수소 저장을 위한 암염 공동 저장 기술 특성 및 적용 사례 분석)

  • Seonghak Cho;Jeonghwan Lee
    • Journal of the Korean Institute of Gas
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    • v.28 no.2
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    • pp.7-16
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    • 2024
  • This study presents investigation on the technical characteristics and field cases of the salt cavern storage method for large-scale hydrogen storage. The salt cavern storage method enables effective hydrogen storage compared to other methods due to the low porosity and permeability of the rock salt that constitutes the cavern, which is not likely to leak and requires a small amount of cushion gas for operation. In addition, there is no chemical reaction between rock salt and hydrogen, and multiple injection/withdrawl cycles can be performed making it effective for peak shaving and short-term storage. The salt cavern is formed in three stages: leaching, debrining, and filling, and leakage tests are conducted to ensure stable operation. Field applications are currently performing to meet industrial demand in the surrounding area of four sites in the UK and Texas, USA, and salt cavern operation is being prepared for energy storage in European countries such as Germany and France. The investigated results in this study can be utilized as a basic guideline for the design of future hydrogen storage projects.

A Study of Damage Assessment Caused by Hydrogen Gas Leak in Tube Trailer Storage Facilities (수소 Tube Trailer 저장시설에서의 수소가스 누출에 따른 사고피해예측에 관한 연구)

  • Kim, Jong-Rak;Hwang, Seong-Min;Yoon, Myong-O
    • Fire Science and Engineering
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    • v.25 no.6
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    • pp.32-38
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    • 2011
  • As the using rate of an explosive gas has been increased in the industrial site, the regional residents adjacent to the site as well as the site workers have frequently fallen into a dangerous situation. Damage caused by accident in the process using hydrogen gas is not confined only to the relevant process, but also is linked to a large scale of fire or explosion and it bring about heavy casualties. Therefore, personnel in charge should investigate the kinds and causes of the accident, forecast the scale of damage and also, shall establish and manage safety countermeasures. We, in Anti-Calamity Research Center, forecasted the scope of danger if break out a fire or/and explosion in hydrogen gas facilities of MLCC firing process. We selected piping leak accident, which is the most frequent accident case based on an actual analysis of accident data occurred. We select and apply piping leak accident which is the most frequent case based on an actual accident data as a model of damage forecasting scenario caused by accident. A jet fire breaks out if hydrogen gas leaks through pipe size of 10 mm ${\Phi}$ under pressure of 120 bar, and in case of $4kw/m^2$ of radiation level, the radiation heat can produce an effect on up to distance of maximum 12.45 meter. Herein, we are going to recommend safety security and countermeasures for improvement through forecasting of accident damages.

Prediction of Damages and Evacuation Strategies for Gas Leaks from Chlorine Transport Vehicles (염소 운송차량 가스누출시 피해예측 및 대피방안)

  • Yang, Yong-Ho;Kong, Ha-Sung
    • The Journal of the Convergence on Culture Technology
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    • v.10 no.2
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    • pp.407-417
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    • 2024
  • The objective of this study is to predict and reduce potential damage caused by chlorine gas leaks, a hazardous material, when vehicles transporting it overturn due to accidents or other incidents. The goal is to forecast the anticipated damages caused by chlorine toxicity levels (ppm) and to design effective response strategies for mitigating them. To predict potential damages, we conducted quantitative assessments using the ALOHA program to calculate the toxic effects (ppm) and damage distances resulting from chlorine leaks, taking into account potential negligence of drivers during transportation. The extent of damage from toxic gas leaks is influenced by various factors, including the amount of the leaked hazardous material and the meteorological conditions at the time of the leak. Therefore, a comprehensive analysis of damage distances was conducted by examining various scenarios that involved variations in the amount of leakage and weather conditions. Under intermediate conditions (leakage quantity: 5 tons, wind speed: 3 m/s, atmospheric stability: D), the estimated distance for exceeding the AEGL-2 level of 2 ppm was calculated to be 9 km. This concentration poses a high risk of respiratory disturbance and potential human casualties, comparable to the toxicity of hydrogen chloride. In particular, leaks in urban areas can lead to significant loss of life. In the event of a leakage incident, we proposed a plan to minimize damage by implementing appropriate response strategies based on the location and amount of the leak when an accident occurs.

Consequence Analysis on the Leakage Accident of Hydrogen Fuel in a Combined Cycle Power Plant: Based on the Effect of Regional Environmental Features (복합화력발전소 내 수소연료 적용 시 누출 사고에 대한 피해영향범위 분석: 지역별 환경 특성 영향에 기반하여)

  • HEEKYUNG PARK;MINCHUL LEE
    • Transactions of the Korean hydrogen and new energy society
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    • v.34 no.6
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    • pp.698-711
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    • 2023
  • Consequence analysis using an ALOHA program is conducted to calculate the accidental impact ranges in the cases of hydrogen leakage, explosion, and jet fire in a hydrogen fueled combined cycle power plant. To evaluate the effect of weather conditions and topographic features on the damage range, ALOHA is executed for the power plants located in the inland and coastal regions. The damage range of hydrogen leaked in coastal areas is wider than that of inland areas in all risk factors. The obtained results are expected to be used when designing safety system and establishing safety plans.

A Study on the Impact Scope from Hazardous Chemicals Leakage in Jeju Area - Focused on hydrogen fluoride - (제주지역 유해화학물질 누출사고 시 영향범위에 관한 연구 - 불화수소 중심으로 -)

  • Lim, Chaehyun;Doh, Sang Hyeun;Kim, Changyoung
    • Journal of the Korean Society of Urban Environment
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    • v.18 no.4
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    • pp.495-502
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    • 2018
  • In this study, the AERMOD air diffusing model was used to estimate the range of influence of Hazardous chemicals (hydrogen fluoride) in case of small accidents in Jeju area. The impact scope were in the order of Seogwipo Fire Station, Dongbu Fire Station, Jeju Fire Station, and Seobu Fire Station. Seasonal orders were summer, spring, autumn and winter. The correlation between the meteorological factors shows a strong positive correlation with the wind speed of 0.998 and has a negative correlation with the temperature of -0.463. Through the linear regression analysis, we could estimate the equation of Impact scope = 13.922WS (Wind Speed) - 5.195 and the reliability ($R^2$) was as high as 0.995.

Risk Assessment and Its Application for the POSCO's Batch Annealing Furnace Gas Systems (광양제철소 소둔로 가스설비에 대한 위험성 평가 및 안전성향상안 제시)

  • Kim Y. S.;Yoo J. H.;Jeong S. Y.;Jang E. J.
    • Journal of the Korean Institute of Gas
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    • v.5 no.2 s.14
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    • pp.9-13
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    • 2001
  • A complete spectrum of risk assessment including qualitative and quantitative approaches were performed for the POSCO's Batch Annealing Furnace (BAF) gas systems. The purpose of BAF is to enhance the quality of steel by annealing it with either hydrogen/nitrogen mixture gas or pure hydrogen gas. Number of gas leak scenarios were identified to generate frequency of their occurrences. With the hypothetical accident scenarios given, fire/explosion impact studies were performed to estimate magnitude of significant consequences. Several different indices were also presented from which practical safety improvement action items could be established.

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