Immobilization of U.S. Defense Nuclear Wastes Using the Synroc Process
United States defense nuclear wastes are presently in tank storage, partly as sludges comprising Fe, Mn, Ni, U and Na oxides and hydroxides, together with 0.5 to 5 percent of fission products and actinides (exclusive of uranium). The relative proportions of Al, Fe, Mn, Ni, U and Na in the sludges from different tanks vary considerably, except that (Fe+A1+Mn) are by far the major components and Fe is more abundant than Mn. (Typical compositions of some calcined sludges from Savannah River (Garvin, personal communication) are given in Tables 1, 2, 3). In this paper we will briefly describe how the SYNROC process, utilizing straightforward technology, can be readily adapted to the problem of defense waste immobilization, yielding a dense, inert ceramic waste form, SYNROC-D.
KeywordsFission Product Nuclear Waste Oxygen Fugacity Waste Form Nuclear Waste Management
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