The thermally-induced electrical failure (THIEF) model was developed by the National Institute of Standards and Technology (NIST) as part of the Cable Response t o Live Fire (CAROLFIRE) program sponsored by the NRC. The new spreadsheet predicts the behavior of power cables, instrument cables, and control cables during a fire. The majority of the original FDT s were developed using principles and information from the Society of Fire Protection Engineers (SFPE) Handbook of Fire Protection Engineering, the National Fire Protection Association (NFPA) Fire Protection Handbook, and other fire science literature. This NUREG-series report documents a new spreadsheet that has been added to the FDT s suite and describes updates, corrections, and improvements to the existing spreadsheets. Each FDT s spreadsheet also contains a list of the physical and thermal properties of the materials commonly encountered in NPPs. These FDT s enable inspectors to perform quick, easy, firstorder calculations for potential fire scenarios using today's state-of-the-art principles of fire dynamics. The FDT s were developed using state-of-the-art fire dynamics equations and correlations that were preprogrammed and locked into Microsoft Excel ® spreadsheets. These methods have been implemented in spreadsheets and taught at the NRC's quarterly regional inspector workshops. Nuclear Regulatory Commission (NRC) has developed quantitative methods, known as " Fire Dynamics Tools" (FDT s), for analyzing the impact of fire and fire protection systems in nuclear power plants (NPPs). Estimating the Ignition Time of a Target Fuel Exposed to a Constant Radiative Heat FluxĬhapter 7. Estimating the Full-Scale Heat Release Rate of a Cable Tray FireĬhapter 8. Estimating Burning Duration of Solid CombustiblesĬhapter 9. Estimating Centerline Temperature of a Buoyant Fire PlumeĬhapter 10. Estimating Sprinkler Response TimeĬhapter 14. Estimating Pressure Rise Due to a Fire in a Closed CompartmentĬhapter 15. Estimating Pressure Increase and Explosive Energy Release Associated with ExplosionsĬhapter 16. Calculating the Rate of Hydrogen Gas Generation in Battery RoomsĬhapter 17.1 Estimating Thickness of Fire Protection Spray-Applied Coating for Structural Steel Beams (Substitution Correlation)Ĭhapter 17.2 Estimating Fire Resistance Time of Steel Beams Protected by Fire Protection Insulation (Quasi-Steady-State Approach)Ĭhapter 17.3 Estimating Fire Resistance Time of Steel Beams Protected by Fire Protection Insulation (Quasi-Steady-State Approach)Ĭhapter 17.4 Estimating Fire Resistance Time of Unprotected Steel Beams (Quasi-steady-state Approach)Ĭhapter 18 Estimating Visibility Through SmokeĬhapter 19 Estimating the Thermally-Induced Electrical Failure (THIEF) of Cables NUREG-1805 Supplement 1, Volume 2 – Appendices (PDF – 14.88 MB)Ĭhapter 2.1 Predicting Hot Gas Layer Temperature and Smoke Layer Height in a Room Fire with Natural VentilationĬhapter 2.2 Predicting Hot Gas Layer Temperature in a Room Fire with Forced VentilationĬhapter 2.3 Predicting Hot Gas Layer Temperature in a Room Fire with Door ClosedĬhapter 3. Estimating Burning Characteristics of Liquid Pool Fire, Heat Release Rate, Burning Duration, and Flame HeightĬhapter 4. Estimating Wall Fire Flame HeightĬhapter 5.1 Estimating Radiant Heat Flux from Fire to a Target Fuel at Ground Level under Wind-Free Condition Point Source Radiation ModelĬhapter 5.2 Estimating Radiant Heat Flux from Fire to a Target Fuel at Ground Level in Presence of Wind (Tilted Flame) Solid Flame Radiation ModelĬhapter 5.3 Estimating Thermal Radiation from Hydrocarbon FireballsĬhapter 6. NUREG-1805 Supplement 1, Volume 1 (PDF – 2.43 MB) NUREG-1805, Supplement 1, Volumes 1 & 2 Title NUREG-1805, Supplement 1, Volumes 1 & 2Īppendix: Simple Activity Flux Publication Information.Nuclear Regulatory Commission Fire Protection Inspection Program (NUREG-1805, Supplement 1, Volumes 1 & 2) Fire Dynamics Tools (FDTs) Quantitative Fire Hazard Analysis Methods for the U.S.
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