OECD PRISME project: Fires in confined and ventilated nuclear-type multi-compartments - Overview and main experimental results

Audouin, L.; Rigollet, L.; Prétrel, Hugues; Saux, W. Le; Röwekamp, M.

doi:10.1016/j.firesaf.2013.07.008

Cited by 62 publications

(41 citation statements)

References 13 publications

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“…The experimental test considered in this work has been performed by the French institute IRSN (Institut de Radioprotection et de Sûreté Nucléaire) in the context of two large international collaborative research projects, called PRISME and PRISME 2 [5,6]. The burning behaviour of cable trays in open atmosphere conditions is characterized in [7].…”

Section: Description Of the Fire Scenariomentioning

confidence: 99%

Flame Spread Monitoring and Estimation of the Heat Release Rate from a Cable Tray Fire Using Video Fire Analysis (VFA)

et al. 2015

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The paper presents an application of Video Fire Analysis (VFA) to a cable tray fire scenario, a scenario of interest to Nuclear Power Plants (NPPs) where cables constitute a substantial part of the combustible load. Five horizontal trays, each 2.4 m long and 0.45 m wide, are positioned with a 0.3 m spacing (in the vertical direction) and set-up against an insulated wall. Each tray contains 49 power PVC cables of 13 mm outer diameter. Ignition is performed with an 80 kW propane burner centrally positioned at 0.2 m below the first (i.e. lowest) tray. Thanks to a flame detection algorithm, the VFA technique allows a reconstruction of the heat release rate (HRR) profile based on the estimated temporal evolution of flame and extinction fronts at the level of each tray. The obtained profile is generally in good agreement with the HRR measurements (from oxygen depletion calorimetry). However, the time to reach the peak HRR is overestimated by approximately 100 s and the peak HRR of 3 MW is underestimated by 17%. These results are nevertheless encouraging because they provide confidence in the flame spread measurements (which are estimated for the case at hand between 2 and 5 mm/s). Therefore, a systematic application of VFA to real-scale experiments is believed to generate a valuable set of data (e.g. flame spread rates) for the development of simplified modelling.

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Section: Description Of the Fire Scenariomentioning

confidence: 99%

Flame Spread Monitoring and Estimation of the Heat Release Rate from a Cable Tray Fire Using Video Fire Analysis (VFA)

et al. 2015

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“…More recently, the experiments within the OECD PRISME programme [4] have produced detailed information about the development of compartment pressure, ventilation flows and liquid pool fire dynamics in a very air-tight compartment, reported in numerous articles [5][6][7][8]. Pre´trel et al [5,6] investigated the influence of the enclosure airtightness on pressure using experiments and theoretical analysis.…”

Section: Introductionmentioning

confidence: 99%

Experiments and Numerical Simulations of Pressure Effects in Apartment Fires

Janardhan

Hostikka

2016

Fire Technol

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Abstract. The fire induced pressure and its influence on ventilation flows within a compartment have not been studied in detail previously. In this research work, we have investigated the development of gas pressure and the resulting flows in compartment fires first experimentally, by burning a series of heptane pool and polyurethane mattress fires inside a real, 58.6 m 2 by 2.57 m high, apartment and then by carrying out numerical simulations of the experiments with the FDS code. The experiments were conducted with three different ventilation duct configurations to simulate three different airtightness conditions. The peak heat release rates were less than 1 MW and the burning times were about 180 s. The experimental results indicate that the gas pressure in relatively closed apartment can become high enough to revert the flows of the ventilation system, prevent escape through inwards-opening doors, and even break some structures. The peak gas temperatures under the ceiling of the burn room were about 300°C. The pool fires remained well-ventilated. The pressure ranges encountered in the experiments were between 100 Pa to 1650 Pa and the pressure occured within 50 s of ignition. We also report the FDS validation for this type of simulations and discuss the process of modelling the ventilation system and leakages.

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“…In the case of under-ventilated conditions, the fuel mass loss rate is proportional to the oxygen concentration (Peatross and Beyler, 1997;Audouin et al, 2013). In addition, the fuel mass loss rate is to be typically specified by the FDS user and is not adjusted by the fire models to the conditions Table 4 Fire simulation results for non-propagating fire of MCB.…”

Section: Fire Simulation Resultsmentioning

confidence: 99%