A WAY TO CHARACTERIZE THE RANGE
OF VALIDITY OF A FIRE MODEL
Kevin McGrattan
National Institute of Standards and Technology
Gaithersburg, Maryland, USA
Taylor Myers
University of Maryland
College Park, Maryland, USA
US NRC/EPRI Fire Model Validation Study NUREG-1824
Big fires in a small space…
Small fires in a big space…
2.2 m
22 m
Credit USN and Bob Vettori (NIST)
W
L
D
H
Lf
rcj
Fire Froude Number
W
L
D
H
Lf
rcj
Flame Height relative to Ceiling Height Lf /H
W
L
D
H
Lf
rcj
W
L
D
H
Lf
rcj
Relative Distance along the Ceiling, rcj/H
W
L
D
H
Lf
rcj
Target distance relative to FireDiameter
rrad/D
rrad
W
L
D
H
Lf
rcj
Global Equivalence Ratio
Characteristic Fire DiameterRelative to Cell Size D*/dx
W
L
D*
H
Lf
rcj
Acknowledgments:
Dave Stroup, Mark Salley – US Nuclear Regulatory Commission
Francisco Joglar – SAIC/EPRI
References
NUREG-1824, V&V of Selected Fire Models for Nuclear Power Plant Applications
NUREG-1934, Nuclear Power Plant Fire Modeling Application Guide
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