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Fire Protection Research Program
Corner Effects Tests (NUREG/CR-0833)
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Publication Information
Leo J. Klamerus
Date Published: December 1979
Sandia Laboratories
Albuquerque, New Mexico 87185
operated by
Sandia Corporation
for the
U. S. Department of Energy
Prepared for
Division of Reactor Safety Research
Office of Nuclear Regulatory Research
U.S. Nuclear Regulatory Commission
Washington, DC 20555
Under Memorandum of Understanding DOE 40-550-75
NRC FIN No. A1010
Availability
Notice
Abstract
Under the direction of the Nuclear Regulatory Commission,
Sandia Laboratories has been conducting confirmatory research
in fire protection for nuclear power plants. During all previous
full scale fire tests at Sandia Laboratories involving fires,
both electrically and exposure initiated, an open area in
a nuclear power plant was simulated. The question was often
asked, "How much contribution to fire severity does a reradiating
ceiling and wall make?" This report presents the results of
several tests which address this question. By quantifying
the effects of corner reradiation (i.e., a ceiling joining a
wall) at different distances from a horizontal array of cable
trays ignited by an exposure fire, it was found for the cables
tested that fire damage, as measured by the extent of cable
insulation degradation, varied approximately as the inverse
of the square of the distance separating the cables from the
corner. As experienced in previous Sandia fire tests, the
difference in fire resistance between IEEE-383 qualified cable
and unqualified cable was apparent in these corner-configuration
tests.
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