Progress is reported on a comprehensive program to develop the necessary technologies for cost/beneficial uses of existing and future surplus radioactive materials. The major portion of the work was concentrated on the testing of the effectiveness of ..gamma.. sources for the processing of sewage sludge to inactivate enteric viruses and bacteria and the subsequent testing of the biological effects of the treated sludge when used as fertilizer or additives to animal feeds.
Progress is reported in a program aimed at recovering radiation sources from radioactive wastes and using these sources, mainly /sup 137/Cs, for irradiating sewage sludge. Information is included on: development and cost of dried sludge irradiator; heat and radiation inactivation of sludge-contained viruses and bacteria; virucidal agents in sludge; use of thermoradiated sludge as animal feed; and a comparison of the efficiency of various source materials. (LCL)