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HomeNRC LibraryDocument          CollectionsNUREG-Series          PublicationsPublications          Prepared by NRC Contractors

# Evaluation of Suppression Methods for Electrical Cable Fires (NUREG/CR-3656,  SAND83-2664)        						

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                - Publication Information
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                - NUREG/CR-3656          (PDF - 5.81 MB)

## Publication Information

**Manuscript Completed**: June 1986****Date Published****: October 1986

**Prepared by:**J.M. Chavez and L.D.  LambertSandia National Laboratories Albuquerque. New Mexico 87185Operated by Sandia Corporation for the U.S.  Department of EnergyUnder Contract No.  DE-AC04-76DP00789 

**Prepared for:**        Division of Engineering Technology  Office of Nuclear Regulatory Research        U.S. Nuclear Regulatory   Commission          Washington, DC 20555-0001

        Under Memorandum of Understanding DOE 40-550-75

NRC FIN A-1010

Availability       Notice

## Abstract

The electrical cable fire suppression tests conducted at  Sandia National   Laboratories were performed to provide confirmatory research for the U.S. Nuclear Regulatory Commission  (NRC) on suppression   systems effectiveness. This report  describes full-scale tests on both   horizontally and vertically  oriented cable trays, filled with either   IEEE-383  qualified cables or unqualified cables, to determine   the  effectiveness of Halon 1301. water sprinklers, directed  water spray,   and carbon dioxide fire suppression systems.  These four methods of fire   suppression were evaluated to  determine their effectiveness in suppressing   both exposure  type and fully developed type cable tray fires. The   results  show that although all methods of suppression were   effective,  given sufficient suppressant concentrations, spray   durations,  and soak times, the water suppression methods were the most effective. Despite their effectiveness in suppressing cable  fires, it was   observed that both gaseous and water suppressants may cause or permit damage to nonburning cables  and equipment. The adverse   environments associated with the  fire and suppression related activities   (e.g., high temperatures, humidity, corrosiveness) could damage cables and  equipment and result in   immediate or latent damage. Occurrence or likelihood of these failures was not investigated  in this test series.

*Page Last Reviewed/Updated Monday, March 21, 2011*

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