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Fire Sci. Eng. > Volume 27(2); 2013 > Article
Journal of Korean Institute of Fire Science and Engineering 2013;27(2):31-39.
DOI: https://doi.org/10.7731/KIFSE.2013.27.2.031    Published online April 30, 2013.
원자력발전소의 다중 구획에서 화재특성 예측을 위한 FDS 검증 (Part I: 과환기화재 조건)
문선여, 황철홍, 박종석, 도규식
1대전대학교 소방방재학과
2대전대학교 소방방재학과
3한국원자력안전기술원
4한국원자력안전기술원
Validation of FDS for Predicting the Fire Characteristics in the Multi-Compartments of Nuclear Power Plant (Part I: Over-ventilated Fire Condition)
Mun Sun-Yeo, Hwang Cheol-Hong, Park Jong Seok, Do Kyusik
1Department of Fire & Disaster Prevention, Daejeon University
2Department of Fire & Disaster Prevention, Daejeon University
3Korea Institute of Nuclear Safety (KINS)
4Korea Institute of Nuclear Safety (KINS)
요약
원자력발전소의 강제 환기가 적용된 밀폐된 다중구획에서 실규모 pool 화재를 모사하기 위하여 FDS가 적용되었다. FDS의예측성능은 수치결과와 OECD/NEA 화재실증실험 국제공동연구 프로젝트(PRISME)를통해 얻어진 실험결과의비교를 통해 평가되었다. 단순한 연소모델의 적용으로 발생되는 FDS의 본질적인 한계를 제외하고 FDS 수행과정에서 발생된 사용자 의존성에 따른 FDS의 예측결과 차이를 명확히 확인하기 위하여, 과환기 화재조건이 본 연구에서 검토되었다. 특히 강제 환기시스템에서 정확한 경계조건의 중요성이 상세하게 논의되었다. 급기 및 배기를 위한 환기구의 경계조건은 구획 내부의 열 및 화학적특성에 큰 영향을 주고 있음을 FDS 결과를 통해 알 수 있었으며, 정확한 경계조건이 부여된 FDS는 원전 타입의 다중 구획 내부의 온도, 열유속 및 화학종 농도를 정량적으로 잘 예측하고 있음을 확인하였다.
Abstract
The Fire Dynamics Simulator (FDS) has been applied to simulate a full-scale pool fire in well-confined and mechanically ventilated multi-compartments representative of nuclear power plant. The predictive performance of FDS was evaluated through a comparison of the numerical data with experimental data obtained by the OECD/NEA PRISME project. To identify clearly the FDS results regarding to the user-dependence in the process of FDS implementation except for the intrinsic limitation of FDS such as simple combustion model, only the over-ventilated fire condition was chosen. In particular, the importance of accurate boundary conditions (B.C.) in mechanically ventilated system were discussed in details. It was known from FDS results that the B.C. on inlet and outlet vents did significantly affect the thermal and chemical characteristics inside the compartments. Finally, it was confirmed that the FDS imposed an accurate ventilation B.C. provided qualitatively good agreement with temperatures, heat fluxes and concentrations measured inside the nuclear-type multi-compartments.
Key Words: Fire Modeling, FDS(Fire Dynamics Simulator), Nuclear Power Plant, Compartment Fire, Mechanical Ventilation System


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