Heat Release Rates of Electrical Enclosure Fires (HELEN-FIRE), Final Report (NUREG/CR-7197)

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Publication Information

Manuscript Completed: February 2015
Date Published: April 2016

Prepared by:
Kevin McGrattan
Scott Bareham

National Institute of Standards and Technology
Engineering Laboratory; Fire Research Division
Gaithersburg, MD 20899

David Stroup, NRC Project Manager

Prepared for:
Division of Risk Analysis
Office of Nuclear Regulatory Research
U.S. Nuclear Regulatory Commission
Washington, DC 20555-0001

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This report documents an experimental program to explore the heat release rate and burning behavior of electrical enclosures commonly found in nuclear power plants. Electrical enclosures are a potential source of fire in nuclear power plants because they contain both combustible materials and live electrical circuits. These fires have the potential to disrupt power, instrumentation, and control in the plant. Key parameters affecting fire in an enclosure include its size, openings, electrical voltage, and combustible load.

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