Home > Electronic
Reading Room > Document
Collections > NUREG-Series
Publications > Publications
Prepared by NRC Contractors
> NUREG/CR-0152
Development and Verification of Fire Tests for Cable Systems and System Components (NUREG/CR-0152)
On this page:
Download complete document
The following links on this page are to documents in Adobe Portable Document
Format (PDF). See our Plugins, Viewers, and
Other Tools page for more information. For successful viewing of PDF documents on our site please be sure to use the latest version of Adobe.
Publication Information
L. Przybyla W. J. Christian
Manuscript Completed: March 1978
Date Published: June 1978
Underwriters Laboratories, Inc. 333 Pfingsten Road
Northbrook, IL 60062
Division of Reactor Safety Research
Office of Nuclear Regulatory Research
U. S. Nuclear Regulatory Commission
Under Contract No. NRC-04-77-122
Availability
Notice
Abstract
Experiments were performed to define the effects of a
cnumber of test parameters on the results of vertical flame tests
of tray-mounted cables in a configuration similar to that specified
by IEEE Standard 383. Parameters considered were fuel
input rate, fuel-air ratio, burner location, and test cell
configuration. In order to reduce time and material costs for
the experiments, the parameters were first investigated with
an inert instrumented board to simulate a full cable tray.
Measurements of temperatures and heat flux along the board were
used to define the-range of parameters to be used in experiments
with actual cables. Full cable trays, 8 ft long, were used
in these experiments; and observations were made of the flame
travel distances and air temperatures on both faces of the tray, as well as temperature distribution along the jacket of
one cable in each tray. Two burners of the type specified in
IEEE 383, one at each tray face, provided the ignition source.
Experiments with one cable type produced results which were
extremely variable because of random movements of the cable
bundle during burning. Since measures to remove this variability
by permanently fixing cable positions would remove realism
from the test, experimentation with full cable trays was discontinued.
Measurements of jacket temperature distribution
obtained in these experiments indicated that it may be possible
to determine the upward progression of cable damage in that
way. Future experiments to study the effects of test parameters
on the IEEE 383 standard test are outlined.
|
