United States Nuclear Regulatory Commission - Protecting People and the Environment

Experimental Results Pertaining to the Performance of Thermal Igniters (NUREG/CR-5079, SAND87-3139)

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Publication Information

Manuscript Completed: September 1989
Date Published:
October 1989

Prepared by:
Michael K. Carmel
Sandia National Laboratories
Albuquerque, New Mexico 87185

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

NRC FIN A-1301

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Abstract

This report summarizes the results of various experimental programs regarding the performance of thermal igniters for the deliberate ignition of hydrogen in light water reactors. Experiments involving both premixed combustion and combustion with continuous hydrogen injection are reviewed. Combustion characteristics examined include flammability limits of hydrogen:air and hydrogen:air:steam mixtures, combustion pressure rises, combustion completeness, flame speeds, and heat transfer aspects. Comparisons of igniter type and igniter reliability under simulated reactor accident conditions are included. The results of the research programs provide a broad data base covering nearly all aspects of hydrogen combustion related to the performance of deliberate ignition systems.

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