United States Nuclear Regulatory Commission - Protecting People and the Environment

Test and Criteria for Fire Protection of Cable Penetrations (NUREG/CR-2377, SAND81-7160)

On this page:

Download complete document

Publication Information

Manuscript Completed: June 1981
Date Published: October 1981

Prepared by:
Robert Brady Williamson, Principal Investigator
Fred L. Fisher, Senior Development Engineer
Lawrence Berkeley Laboratory
University of California
Berkeley, California 94720
Under Sandia Contract No. 13-7331

for Sandia National Laboratories
Albuquerque, New Mexico 87185
Operated by Sandia Corporation
for the U.S. Department of Energy

L.J. Klamerus, Sandia Project Officer

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

Under Interagency Agreement DOE 40-550-75

NRC FIN A-1010

Availability Notice


A series of experiments are described which evaluate the effects of test furnace pressure differential and excess pyrolyzates on the fire resistance of cable penetrations installed in fire resistive walls. It is shown that the measured fire resistance of penetrations can be strongly influenced by the pressure difference between the test furnace and the unexposed face of the penetration, and, to a lesser degree, by the presence or absence of excess pyrolyzates. Methods for the local introduction of excess pyrolyzates into a fire test furnace are discussed.

Page Last Reviewed/Updated Monday, April 27, 2020