[en] A knowledge of combustion phenomena and their characteristics is necessary in accident analyses related to the release of hydrogen. As a result of the accident at Three Mile Island, and from the results of related studies of hypothetical degraded core accidents, it is recognized that combustion of hydrogen may, under some circumstances, threaten the integrity of a reactor containment building. This report attempts to provide a perspective on combustion processes which may not otherwise be derived easily from the enormously diverse combustion literature