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Abstract SH147Full Paper + Presentation
Verification of updated Two-layer Zone Model BRI2-CRIEPI Applicable to Fire PRA for Nuclear Power Plants
A practical fire model capable of reproducing realistic fire scenarios is essential to conducting a practical probabilistic risk assessment (PRA) for nuclear power plants. We have continuously improved the BRI2-CRIEPI (Cen) fire simulation zone model to enable analysis of compartment fires under mechanically ventilated conditions.
This paper introduces the various characteristics of the fire model implemented in BRI2-CRIEPI under mechanical ventilation conditions. These characteristics include: 1) the relationship between pressure and ventilation flow rate in ventilation fans, 2) the reduction in mass loss rate (MLR) due to oxygen depletion as the fire progresses, 3) representative oxygen concentrations corresponding to the height of the high-temperature gas layer, 4) a thermal radiation feedback model between the flame and the surrounding environment when the flame impinges on the ceiling, and 5) soot-induced filter clogging.
We verified the BRI2-CRIEPI model using full-scale compartment fire test results from the OECD/NEA project (PRISME3) and the Franco-Japanese joint fire research project (PRELUDE/PML), which was conducted by EDF and CRIEPI. Quantitative evaluation of representative assessment parameters (MLR and high-temperature gas temperature) revealed no apparent bias or systematic trend in the model predictions.
← Check another abstractThis paper introduces the various characteristics of the fire model implemented in BRI2-CRIEPI under mechanical ventilation conditions. These characteristics include: 1) the relationship between pressure and ventilation flow rate in ventilation fans, 2) the reduction in mass loss rate (MLR) due to oxygen depletion as the fire progresses, 3) representative oxygen concentrations corresponding to the height of the high-temperature gas layer, 4) a thermal radiation feedback model between the flame and the surrounding environment when the flame impinges on the ceiling, and 5) soot-induced filter clogging.
We verified the BRI2-CRIEPI model using full-scale compartment fire test results from the OECD/NEA project (PRISME3) and the Franco-Japanese joint fire research project (PRELUDE/PML), which was conducted by EDF and CRIEPI. Quantitative evaluation of representative assessment parameters (MLR and high-temperature gas temperature) revealed no apparent bias or systematic trend in the model predictions.