Fire Dynamics Tools (FDT^s) Quantitative Fire Hazard Analysis Methods for the U.S. Nuclear Regulatory Commission Fire Protection Inspection Program (NUREG 1805, Vol. 1)

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• NUREG-1805, Volume 1
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Publication Information

Manuscript Completed: June 2003
Date Published: June 2003

Division of Systems Safety and Analysis
Office of Nuclear Reactor Regulation
US Nuclear Regulatory Commission
Washington, DC 20555

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Abstract

The U.S. Nuclear Regulatory Commission (NRC), Office of Nuclear Reactor Regulation (NRR), Division of Systems Safety and Analysis (DSSA), Plant Systems Branch (SPLB), Fire Protection Engineering and Special Projects Section has developed quantitative methods, known as "Fire Dynamics Tools (FDT^s)," to assist regional fire protection inspectors in performing fire hazard analysis (FHA). These methods have been implemented in spreadsheets and taught at the NRC's quarterly regional inspector workshops. FDT^s were developed using state-of-the-art fire dynamics equations and correlations that were pre-programmed and locked into Microsoft Excel spreadsheets. These FDT^s will enable the inspector to perform quick, easy, first-order calculations for the potential fire scenarios using today's state-of-the-art principles of fire dynamics. Each FDT^s spreadsheet also contains a list of the physical and thermal properties of the materials commonly encountered in NPPs. This NUREG addresses the technical bases for FDT^s, which were derived from the principles developed primarily in the Society of Fire Protection Engineers (SFPE) Handbook of Fire Protection Engineering, National Fire Protection Association (NFPA) Fire Protection Handbook, and other fire science literature. The subject matter of this NUREG covers many aspects of fire dynamics and contains descriptions of the most important fire processes. A significant number of examples, reference tables, illustrations, and conceptual drawings are presented in this NUREG to expand the inspector's appreciation in visualizing and retaining the material and understanding calculation methods.

Key Words: Fire dynamics, Hazard analysis, Inspection, Significance determination process, Risk-informed evaluation