Catalytic and Spark Hydrogen Igniters

Abstract

Large amounts of hydrogen can be generated during a severe accident and accumulated inside the containment. In such scenarios it is likely that a random ignition source will occur and burn the hydrogen. But it is not sure, if this will happen timely and at low hydrogen concentrations. If combustion is delayed the concentrations reached can be such that the containment is subjected to excessive pressure and temperature loads. This is prevented by deliberate ignition with newly developed and qualified igniters which are independent of external power supply.