• Title/Summary/Keyword: 화재온도

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Fire Resistance of High Performance Concrete(High Strength Concrete & Fiber Reinforced Concrete) (고성능 콘크리트의 내화성능(고강도 및 섬유보강 콘크리트))

  • 소양섭
    • Magazine of the Korea Concrete Institute
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    • v.14 no.2
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    • pp.37-44
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    • 2002
  • 콘크리트의 내화성능에 대한 다각적인 연구가 1970년대부터 원자로의 안정성 확보차원에서 진행되어 왔으며 특히 콘크리트의 취성파괴(brittle failure)등에 대한 연구가 많다. 콘크리트의 내화성이란 화재로부터 보호되고 고열환경에 견디는 재료적 특성 즉 화재온도 1,00$0^{\circ}C$ 정도의 고온을 30분에서 3시간 정도를 받은 경우 콘크리트 중에 매립된 철근 등 철강을 소정의 온도 이하고 유지하기 위한 피복 역할을 유지하면서 구조물의 큰 변형이나 붕괴 등을 막기 위한 소요 압축강도 및 영계수 등의 성능을 가지고 있는 성질을 말한다.(중략)

노말프로판올의 자연발화온도와 발화지연시간의 관계

  • 하동명;최용찬;한종근;김한돌;신용범;정세훈;이문선;윤준혁;류정열
    • Proceedings of the Korean Institute of Industrial Safety Conference
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    • 2003.10a
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    • pp.154-159
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    • 2003
  • 화학공장과 제조업 등의 사업장에서 발생하는 화재 및 폭발은 설비와 건물의 파괴뿐만 아니라 사업장의 근로자와 인근 주민에 대한 인명 피해까지 초래하는 경우가 많으므로 공정 안전을 위해 화재 및 폭발 분야의 연구에 많은 관심을 가져야 한다. 방화(Fire Protection) 및 방폭(Fire Protection)에 관련되는 특성치로 MSDS의 5번째 항목인 폭발화재시대처방법(Fire-fighting Measures)에서는 폭발(연소)한계(Explosive Limit 혹은 Flammability Limit), 인화점(Flash Point), 최소발화온도(AIT: Auto-ignition Temperature)가 제시되고 있다.(중략)

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Fire at an Indoor Shooting Range in Busan I. Fire Reconstruction (부산 실내사격장 화재 I. 화재재현)

  • Park, Woe-Chul
    • Fire Science and Engineering
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    • v.24 no.2
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    • pp.114-119
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    • 2010
  • The fire at a Busan indoor shooting range on November 14, 2009 was reconstructed by using a computational fluid dynamics model for fire simulations, in order to investigate the cause of the heavy death toll in a short period of time. Spread of the flame and smoke, and temperature distribution obtained by fire simulation were compared with the results of fire investigation based on the CCTV recordings. The flame and smoke flew out violently through the door into the cafeteria from the shooting range, and the cafeteria was filled with smoke just within 3 seconds followed by the onset of fire. This is consistent with the CCTV recordings. It was confirmed, as a result, that people in the cafeteria did not have enough evacuation time. The computed temperature at the door knob reached about $1400^{\circ}C$, near its melting point.

Cable Functional Failure Temperature Evaluation of Cable Exposed to the Fire of Nuclear Power Plant (원자력발전소 케이블 노출 화재 시 기능상실온도 분석)

  • Lim, Hyuk-Soon;Bae, Yeon-Kyoung;Chi, Moon-Goo
    • Fire Science and Engineering
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    • v.26 no.1
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    • pp.10-15
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    • 2012
  • The fire event occurred in fire proof zone often causes serious electrical problems such as shorts, ground faults, or open circuits in nuclear power plants. These would be directed to the loss of safe shutdown capabilities performed by safety related systems and equipments. The fire event can treat the basic design principle that safety systems should keep their functions with redundancy and independency. In case of a cable fire, operators can not perform their mission properly and can misjudge the situation because of spurious operation, wrong indication or instrument. These would deteriorate the plant capabilities of safety shutdown and make disastrous conditions. In this paper, investigation and cause analysis of cable fire in Nuclear Power Plant, we described the cable fire temperature and functional failure criteria and the cable functional failure temperature evaluation by exposed fire is studied.

An experimental study on the fire hazard of Sheath Heater (시즈히터의 화재위험성에 관한 실험 연구)

  • Kim, Hakjoong
    • Journal of the Society of Disaster Information
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    • v.10 no.4
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    • pp.511-517
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    • 2014
  • Recently, the fire by sheath heater has been occurred frequently on winter season. The sheath heater has simple internal structure and boils water simply. Therefore, the use of sheath heater has been increased. In this study, found the fire hazard property of sheath heater from understanding the fire mechanism through the experiment to get the measure for decreasing the occurrence of fire. For the analysis of the fire hazard property of the sheath heater, performed the test of temperature change and ignition temperature by using current product. On the result of test, the sheath heaters are the most dangerous appliance to arise fire. Water temperature controller attached to sheath heater is not sufficient to prevent overheating it. The sheath heater should have level switch of water and temperature controller for heater itself to shut off the power supply. Because the cause of fire by sheath heater is overheating itself in the situation of lack water.