to control strategy proposed above the delivery system consists of a ton container housed in and supported by a sheet metal enclosure the ton container is a horizontal pressure vessel with an internal volume of u02dc 450 l and weighs u02dc 529 kg the ton housing has thermal insulation applied internally the housing is horizontally split at approximately the ton centerline the top half is hinged to provide access for maintenance installation and removal of the ton container the edges are sufficiently rigid to avoid distortion three circumferential supports built into the bottom of the housing are equally spaced along the u02dc 52 u2033 cylindrical section of the ton the center support has provision for mounting two infrared detectors which monitor the ton skin surface temperature at each end of the housing a sloped guide rail located on the longitudinal centerline is incorporated and connected to the end supports to facilitate positioning of the ton container to transfer heat to the ton container four ceramic heaters 12 u2033 inside radius u00d7 11 u2033 wide u00d7 28 u2033 cicumferential length are used the heaters are installed in the housing between the supports in two groups of two the heater arrangement on the cylindrical section of the ton container is shown in fig7 each band.