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Heat Release Rates of Electrical Enclosure Fires (HELEN-FIRE)



Kevin B. McGrattan, Scott D. Bareham


This report documents an experimental program to quantify 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.
U.S. Nuclear Regulatory Commission NUREG/CR


electrical enclosures, fire experiments, heat release rate


McGrattan, K. and Bareham, S. (2016), Heat Release Rates of Electrical Enclosure Fires (HELEN-FIRE), U.S. Nuclear Regulatory Commission NUREG/CR, [online], (Accessed July 16, 2024)


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Created April 8, 2016, Updated February 8, 2018