Since start-up of the Redox Plant, different types of decontamination difficulties have been experienced and corrective measures taken. Current decontamination performance is superior to that ever experienced before. However, with the apparent need for the for elimination of the permanganate Head-End process for the IAF oxidation, several modifications to the plant flowsheet and equipment have been planned in order to obtain satisfactory overall decontamination without permanganate Head-End. The objectives of the memorandum are: to summarize generally and briefly the decontamination experience of the Redox process operating on IAF oxidized by sodium dichromate; to indicate the decontamination which probably can be obtained with the new Phase 2 equipment and its improved performance; and to re-evaluate the timing and feasibility of the current approaches for solving the long-range Redox decontamination problems arising as a result of oxidation of IAF by sodium dichromate (vice potassium permanganate).

A scavenging process for the TBP Plant wastes has recently been installed and is expected to result in a considerable reduction in the waste tankage required for storage of TBP Plant Wastes. A similar process has been developed for scavenging the first cycle waste from the BiPO{sub 4} Plants. A study of future requirements and availability of tank storage space indicates that in order to avoid an overall plant critical tank shortage, or the necessity of construction of new tanks, a T-Plant waste scavenging program should provide cribbing facilities by February, 1955. Since tank storage space is critical ad the cost of such storage is a sizable factor in the overall plant operating costs, an investigation of the feasibility of the installation of this waste scavenging process in T-Plant has been undertaken.