Abstract
The shale fracturing program has been concerned with the development of a technique for the safe and economical disposal of large batches of radioactive liquid wastes by mixing the waste with cement and other additives, and injecting the slurry into bedded shale at depths of about 1000 ft. Mixes suitable for use with ORNL's intermediate-level liquid waste have been developed. The slurries remain pumpable for the time (hr) required to complete an injection and once in place in the disposal formation, set into a solid matrix that “fixes” the principal radionuclides. These mixes have a cement base, with clays added to enhance the fixation of radiocesium and a pozzolan cement system to retain the radiostrontium.
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