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Fire Sci. Eng. > Volume 30(3); 2016 > Article
Fire Science and Engineering 2016;30(3):79-85.
DOI: https://doi.org/10.7731/KIFSE.2016.30.3.079    Published online June 30, 2016.
FDS 이용한 주제어실 화재시 케이블 기능상실시간 평가
임혁순, 김인환, 김명수
1한국수력원자력(주) 중앙연구원
2한국수력원자력(주) 중앙연구원
3한국수력원자력(주) 중앙연구원
Cable Functional Failure Time Evaluation for a Main Control Room Fire using Fire Dynamic Simulator
Lim Heok-Soon, Kim In-Hwan, Kim Myung-Su
1Korea Hydro & Nuclear Power Corporations - Central Research Institute
2Korea Hydro & Nuclear Power Corporations - Central Research Institute
3Korea Hydro & Nuclear Power Corporations - Central Research Institute
요약
원자력발전소의 방화지역에서 전기적인 단락, 지락, 전기회로 개방 등의 전기 문제로 화재가 발생할 수 있다. 전기 화재가 발생할 경우 안전계통 및 관련기기의 안전정지 기능이 상실된다. 이러한 사고를 예방하기 위하여 안전계통은 다중성, 독립성으로 설계되어 있다. 그러나 케이블 화재시 운전원은 오동작, 잘못된 지시 및 계측으로 발전소 상황을 잘 못 판단하여 적절한 조치를 하지 못할 수 있다. 따라서 주제어실 화재시 케이블 기능상실온도에서 최소 운전원 조치 요구시간인 5분은 매우 중요하다. 본 논문에서 주제어실 화재시 케이블의 기능상실온도 시간을 분석하여 운전원 조치시간이 충분한지 평가하여 주제어실 화재에 대한 안전성을 확인하였다.
Abstract
Serious electrical problems, such as shorts, ground faults, or circuits, often cause fire events in the fire proof zone of nuclear power plants. These would be directed to the loss of safe shutdown capabilities performed by safety-related systems and equipment. The fire event can be treated with the basic design principle that safety systems should maintain their functions with redundancy and independency. In the case of a cable fire in the main control room, operators cannot perform their mission properly and can misjudge the situation because of spurious operation, incorrect indication or instrument. These would deteriorate the plant capabilities of safety shutdown and result in disastrous conditions. Therefore, during a main control room fire, 5 minutes of operator action time is very important to operate the safety shutdown components. This paper describes the cable functional failure temperature criteria and conducted a cable functional failure time evaluation using Fire Dynamic Simulator to obtain the operator action time for a main control room fire.
Key Words: Fire, Cable fire, Cable functional failure temperature, Main control room, Nuclear power plant


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