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          NRC Library  Document Collections  NUREG-Series Publications  Publications Prepared by NRC StaffMethodology for Modeling Transient Fires in Nuclear Power Plant Fire Probabilistic Risk Assessment (NUREG-2233, EPRI 3002018231)

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Publication Information
	AbstractDownload complete document

NUREG-2233 (PDF – 3.75 MB)Publication Information

**Date Published:** October 2020

U.S Nuclear Regulatory Commission
			Office of Nuclear Regulatory Research (RES)
			Washington, DC 20555-0001
			Electric Power Research Institute (EPRI)
			3420 Hillview Avenue
			Palo Alto, CA 94304-1338U.S. NRC-RES Project Manager
			M. H. Salley
			EPRI Project Managers
			A. LindemanAvailability Notice

Abstract

The method for analyzing transient fires in NUREG/CR-6850 made use of the limited available data, and its application resulted in conservative estimates of transient fire risk. To counter the lack of available data, additional testing was performed based on the transient fire events observed in the Electric Power Research Institute fire events database. The results from the testing effort served as a primary input to develop more realistic data to analyze transient fire risk. This report develops new distributions of peak heat release rate, total energy release, and zones of influence for transient fires. Additionally, this report recommends input values for the detailed fire modeling of transient fires that include fire growth and decay parameters, yields of minor products of combustion, heat of combustion, and the physical size and effective elevation of the fire.

**Keywords**
Fire modeling
Fire probabilistic risk assessment
Heat release rate
Transient fires
Zone of influence

      
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