By OECD Nuclear Energy Agency. Committee on the Safety of Nuclear Installations

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The experiment was performed at VTT Fire technology /HUH 98/. Concerning the zone models, some limited development has been made, mainly to improve the usability of the codes for engineering applications by implementing a modern user interface and a connection to input and output data bases. In Japan, the zone model COMPBRN-IIIe /HOV 91/ is used by NUPEC. The alpha-FLOW code of NUPEC /TAK 92/ is a three-dimensional fluid dynamic calculation code, which consists of mass conservation equations, mass conservation equations of chemical species, momentum equations, energy equations and equations of states for compressive fluid to simulate the time dependent flow and temperature fields induced by fire.

National Institute of Standards and Technology (NIST). , to treat fire propagation over complex fuel arrays, to address very large scale fires, and to treat detailed heat transfer to targets within a flame). None of the improvements are, to date, explicitly targeted at nuclear power plant fire PSA applications. Extensive efforts have been allocated in Finland by the Technical Research Centre of Finland (VTT) to develop the general-use field model codes to be better applicable to fire simulation purposes (PHOENICS /CHM 91/, FLUENT /FLU 97/).

Ignition and damage thresholds, mass burning rates, heat release rates) contained in several reports, such as /TEW 79/, /LEE 81/, LUK 82/, /WAN 85/, /JAC 86/, /WHE 86/, /NOW 91/, /VIG 95/, and /TAN 96/, is used for cable fire modeling. , thermal conductivity, specific heat, density, are estimated using either data for specific cables when available, or, more often, data for generic materials. All of this information is used in COMPBRN analyses to model fire spread (in a discrete, cell-to-cell manner) along and among cable trays.

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Fire risk analysis, fire simulation, fire spreading and impact of smoke and heat on instrumentation electronics : state-of-the-art report by OECD Nuclear Energy Agency. Committee on the Safety of Nuclear Installations


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