The present invention relates to a process to dissolve plutonium or a plutonium alloy, by placing it in contact with an aqueous dissolution mixture, wherein said dissolution mixture comprises nitric acid, a carboxylic acid with complexing properties with respect to plutonium, and a compound comprising at least one NH2 radical such as urea. The disposition parameters including disposition distance and vertical inclination angle for the disposing surface are detected first. A voice call request for a voice call is received through the user interface. The flat panel has a width and the parallel sides extend in a direction permitting each of the parallel sides to be positioned adjacent one of the opposing sides of a doorjamb when the flat panel is positioned adjacent the exterior side of the doorjamb.