Device for the controlled combustion of ignitable hydrogen-air mixtures in a nuclear installation.

摘要

For the targeted, early ignition of H2-air mixtures at low H2 concentrations, which can occur in nuclear facilities, especially in the containment of light water reactors in the event of an accident, an ignition source with a self-sufficient energy storage that can be checked at regular intervals for its charge status (100 ) Mistake. The ignition process is triggered by means of ignition sparks between the ignition electrodes (6a, 6b) by means of triggering elements (AE1, AE2) which are temperature-dependent and pressure-dependent, the discharge of the energy store (100) into the spark igniter (6) over a longer period of time, which depending on the accident, several days can be repeated at intervals. The time intervals can e.g. are several minutes and depend on the renewed formation of ignitable hydrogen-air mixtures. A dry battery (100), in particular a lithium collector, is suitable as an energy store. The latter is also functional at temperatures around 200 ° C. Thermal and pressure switches can be used as trigger elements (AE1, AE2) which activate the ignition source to generate the ignition sparks on the spark igniter (6) of a high-voltage ignition unit (HS). A functional check of the battery (100) and the ignition process by reed contact actuation from the outside is possible.