FAQ
    
    AGREEMENT STATES
    
    Facility Locator
    
    What's New
    
    Site Help
    
    Index A-Z
    
    Contact Us
    
    Email Updates
      
      
      
      
       
      Report a Safety Concern
                  Search
        Nuclear Reactors
  
  Power Reactors
Research & Test ReactorsOperating Reactors
New ReactorsOperator Licensing
Research ActivitiesNuclear Reactor Quick LinksNuclear Materials
  
  Types of Nuclear Materials
Fuel Cycle Facilities
Medical, Industrial, & Academic UsesUranium Recovery
Materials TransportationMaterials Environmental Reviews
National Materials ProgramNuclear Materials Quick LinksRadioactive Waste
  
  Decommissioning of Nuclear Facilities
Low-Level Waste
Waste Incidental to Reprocessing
High-Level WasteUranium Mill Tailings
Low-Level Waste Disposal
High-Level Waste DisposalStorage of Spent Nuclear Fuel
Transportation of Spent Nuclear Fuel
Research ActivitiesRadioactive Waste Quick LinksNuclear Security
  
  Domestic Safeguards
Information Security
Radioactive Material SecurityRequired Reporting for Clearance Holders
Insider Threat Program for Licensees
CybersecurityCriminal History & Firearms Checks
Contact UsPublic Meetings & Involvement
  
  The NRC Approach to Open Government
About Meetings Open to the Public
Conferences & SymposiaDocuments for Comment
NRC Rules and Petitions
Facilitating Stakeholder InvolvementNRC Information Quality Guidelines
Subscribe to E-mail UpdatesCommission Schedule
Public Meeting ScheduleAdjudications (Hearings)
Adjudicatory SubmissionsNRC Library
  
  Basic References
Document Collections
ADAMS Public Documents
Public Document Room
LSN LibraryFOIA & Privacy Act
Photos & Videos
Records Management
Training CoursesFAQ Index
Get Copies of Documents
Withholding of Sensitive Information
Controlled Unclassified Information Program (CUI)Electronic Hearing DocketAbout NRC
  
  The Commission
Organization & Functions
Governing Legislation
Plans, Budget, & Performance
Locations
History
Values
Direction-Setting & Policymaking
Research Activities
Radiation ProtectionFire Protection
Safety Culture
How We Regulate
Emergency Preparedness & Response
Public Affairs
Congressional Affairs
Enforcement
International Programs
State & Tribal ProgramsAlternative Dispute Resolution Programs
Privacy Program
Civil Rights Program
Contact Us
Career Opportunities
Contracting Opportunities
Small Businesses
Grant Opportunities
Generic SchedulesOther Links
  
  FAQ
Glossary
Facility Locator
What's NewSite Help
Index A-Z
Contact Us
Email UpdatesNRC Facebook
NRC Twitter Feed
NRC Linkedin
NRC Youtube Channel
NRC Flickr Gallery
NRC Blog Archived
NRC Email Subscriptions - GovDelivery Home
          NRC Library  Document Collections  NUREG-Series Publications  Publications Prepared by NRC Staff  Fire Dynamics Tools (FDTs) – Quantitative Fire Hazard Analysis Methods for the U.S. Nuclear RegulatoFire Dynamics Tools (FDTs) Quantitative Fire Hazard Analysis Methods for the U.S. Nuclear Regulatory Commission Fire Protection Inspection Program (NUREG-1805, Supplement 1, Volumes 1 & 2)

On this page:

Publication Information
	NUREG-1805, Supplement 1, Volumes 1 & 2
	AbstractAppendix: Simple Activity Flux

Publication Information

**Manuscript Completed**: June 2013**Date Published**: July 2013

**Prepared by**:
D. Stroup*, G. Taylor*, G. Hausman**

*Office of Nuclear Regulatory Research
**Region III

M. H. Salley, NRC Project Manager

**Prepared for**:
Office of Nuclear Reactor Research
U.S. Nuclear Regulatory Commission
Washington, DC 20555-0001

Availability Notice



NUREG-1805, Supplement 1, Volumes 1 & 2


TitleNUREG-1805 Supplement 1, Volume 1 (PDF – 2.43 MB)NUREG-1805 Supplement 1, Volume 2 – Appendices (PDF – 14.88 MB)Spreadsheet Title
			English Units
			SI UnitsChapter 2.1 Predicting Hot Gas Layer Temperature and Smoke Layer Height in a Room Fire with Natural VentilationChapter 2.2 Predicting Hot Gas Layer Temperature in a Room Fire with Forced VentilationChapter 2.3 Predicting Hot Gas Layer Temperature in a Room Fire with Door ClosedChapter 3. Estimating Burning Characteristics of Liquid Pool Fire, Heat Release Rate, Burning Duration, and Flame HeightChapter 4. Estimating Wall Fire Flame HeightChapter 5.1 Estimating Radiant Heat Flux from Fire to a Target Fuel at Ground Level under Wind-Free Condition Point Source Radiation ModelChapter 5.2 Estimating Radiant Heat Flux from Fire to a Target Fuel at Ground Level in Presence of Wind (Tilted Flame) Solid Flame Radiation ModelChapter 5.3 Estimating Thermal Radiation from Hydrocarbon FireballsChapter 6. Estimating the Ignition Time of a Target Fuel Exposed to a Constant Radiative Heat FluxChapter 7. Estimating the Full-Scale Heat Release Rate of a Cable Tray FireChapter 8. Estimating Burning Duration of Solid CombustiblesChapter 9. Estimating Centerline Temperature of a Buoyant Fire PlumeChapter 10. Estimating Sprinkler Response TimeChapter 13. Fire Severity CalculationsChapter 14. Estimating Pressure Rise Due to a Fire in a Closed CompartmentChapter 15. Estimating Pressure Increase and Explosive Energy Release Associated with ExplosionsChapter 16. Calculating the Rate of Hydrogen Gas Generation in Battery RoomsChapter 17.1 Estimating Thickness of Fire Protection Spray-Applied Coating for Structural Steel Beams (Substitution Correlation)Chapter 17.2 Estimating Fire Resistance Time of Steel Beams Protected by Fire Protection Insulation (Quasi-Steady-State Approach)Chapter 17.3 Estimating Fire Resistance Time of Steel Beams Protected by Fire Protection Insulation (Quasi-Steady-State Approach)Chapter 17.4 Estimating Fire Resistance Time of Unprotected Steel Beams (Quasi-steady-state Approach)Chapter 18 Estimating Visibility Through SmokeChapter 19 Estimating the Thermally-Induced Electrical Failure (THIEF) of Cables

Abstract

The U.S. Nuclear Regulatory Commission (NRC) has developed quantitative methods, known as "**F**ire **D**ynamics **T**ools" (FDTs), for analyzing the impact of fire and fire protection systems in nuclear power plants (NPPs). These methods have been implemented in spreadsheets and taught at the NRC's quarterly regional inspector workshops. The FDTs were developed using state-of-the-art fire dynamics equations and correlations that were preprogrammed and locked into Microsoft Excel® spreadsheets. These FDTs enable inspectors to perform quick, easy, firstorder calculations for potential fire scenarios using today's state-of-the-art principles of fire dynamics. Each FDTs spreadsheet also contains a list of the physical and thermal properties of the materials commonly encountered in NPPs.

This NUREG-series report documents a new spreadsheet that has been added to the FDTs suite and describes updates, corrections, and improvements to the existing spreadsheets. The majority of the original FDTs 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. The new spreadsheet predicts the behavior of power cables, instrument cables, and control cables during a fire. The thermally-induced electrical failure (THIEF) model was developed by the National Institute of Standards and Technology (NIST) as part of the **Ca**ble **R**esponse t**o** **L**ive **Fire** (CAROLFIRE) program sponsored by the NRC. The experiments for CAROLFIRE were conducted at Sandia National Laboratories, Albuquerque, New Mexico. THIEF model predictions have been compared to experimental measurements of instrumented cables in a variety of configurations, and the results indicate that the model is an appropriate analysis tool for NPP applications. The accuracy and simplicity of the THIEF model have been shown to be comparable to that of the activation algorithms for various fire protection devices (e.g., sprinklers, heat and smoke detectors).



      
      Page Last Reviewed/Updated Wednesday, March 24, 2021  Home
NEWS RELEASES

EVENT REPORTS

ADAMS

OPEN GOV

DIGITAL GOVERNMENT

THE STUDENT CORNER

PHOTOS & VIDEOS

FOR DEVELOPERS
        About Us
STRATEGIC PLAN

BUDGET & PERFORMANCE

AGENCY FINANCIAL REPORT

LICENSE FEES

HISTORY OF THE NRC

CAREER OPPORTUNITIES

NRC ETHICS

AGENCY STATUS

CONTACT US
        Popular Documents
INFO DIGEST

FACT SHEETS & BROCHURES

FORMS

ELECTRONIC SUBMITTALS APPLICATION

ADJUDICATORY SUBMISSIONS

NRC REPORTS - NUREG

NRC REGULATIONS - 10-CFR

INSPECTION REPORTS

PLAIN WRITING

ENFORCEMENT ACTIONS

RULEMAKING

GLOSSARY
        Stay Connected
    
    
    
    
    United States Nuclear Regulatory Commission
    
    
    
    
    Regulations.gov

USA.gov

FOIA

Whistleblower Protection

No Fear EEO

Inspector General

Site Map

Accessibility

Privacy Policy

Site Disclaimer

For Employees