internal volume the waste and moisture is then sealed within the bag and the sealed bag is introduced into a decontamination chamber and subjected to microwave radiation within the chamber at a predetermined level and time sufficient to sterilize the waste the decontamination chamber defines an internal surface spaced a predetermined distance from the flexible bag with the bag at about ambient temperature the predetermined distance is large enough to permit expansion of the bag within the space when the bag is subjected to the microwave radiation and small enough to permit the internal surface to engage the bag and thereby prevent further expansion of the bag prior to reaching its bursting point in order maintain the bag in its sealed condition throughout the microwaving and decontamination process application_number US 50607195 A description fig1 is a schematic cross sectional view of a relatively simple or prototype model of a non intrusive microwave decontamination machine for the processing of infectious waste in accordance with the present invention a better understanding of the embodiment of the invention and distinguishing features of the machine may be obtained if attention is focused upon the following approximately 30 lbs of medical waste enclosed and sealed in red bags and in temporary storage at the facility will be processed by loading into the microwave cavity 1 defined by a cavity wall the red bag 2 contains typical medical waste as identified above and moisture either as an intrinsic part of or intentionally added in the packing process will sit in the base of the microwave oven space around and above the red bag 2 is limited by the cavity wall forming a rigid support surface that does.