A fixing device includes an elastic rotator and a cooler disposed opposite the rotator to cool the rotator with cooling air. Actuation signals for actuating actuators are generated from the latter. State machine, and memory manager state machines implemented at a hardware gate level. In certain embodiments, the heat from the one or more heaters may pyrolyze at least some hydrocarbons within the part of the formation. Furthermore, an illuminant is provided comprising serial connected OLED-devices. The fire resistant solution may be removed from the interstitial space for tank inspection and repair.