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Chemical Technology Division Oak Ridge National Laboratory1 Oak Ridge, Tennessee 37831-6044 L INTRODUCI'ION Oak RidgeNational Laboratory (ORNL), inOak Ridge, Tennessee, isoperated by Martin Marietta EnergySystems, Inc., fortheU.S.Department of Energy(DOE). Many of the major ORNL activities involve research and development that supports theDOE's programs infusion, fission, and otherenergytechnologies. In carrying out theseprograms, a widevariety of liquidwastewater streams are generated. Liquid low-level waste(LLLW), generated at radiochemical production facilities and laboratories, is generally highly contaminated with fission products and transuranium elements. A more dilute contaminated stream, process wastewater, is also generated. Improved treatment methods are being investigated for both of the above waste streams. BACKGROUNDThe LLLW system currently treats over 400,000 gal of waste per year, reducing the volume by evaporation to approximately 12,500 gal of waste concentrate. The waste concentrate is stored in eight 50,000 gal vaulted underground storage tanks known as the Melton Valley Storage Tanks

NOTICE This document contains information of a preliminary nature. lt is subject to revision or correction and therefore does not represent a final relx)rt.

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