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High Level Waste supernates are hazardous due to the presence of small quantities of mercury, chromium, lead, silver and barium. The fate of these components based on process knowledge was evaluated. The supernates were grouped into Traditional (normal storage and evaporation), Dilute (stored in Type IV tanks), and Sludge Processing categories, and a review of the limited quantity of available sample data for each type of supernate was performed. The maximum concentration of each hazardous constituent was determined. The most restrictive hazardous constituent in Traditional and Sludge Processing supernates was determined to be mercury, and the most restrictive component in Dilute supernate was chromium. Containers of solid waste contaminated with these supernates must be manifested as nonhazardous before disposal as Low Level Waste in the engineered vaults in the EAV. A method was developed to screen waste containers in order to identify those containers that are nonhazardous. A criterion for {sup 137}Cs content was arbitrarily set to 0.1 Ci, and the volume of supernate required to deposit 0.1 Ci was calculated. Containers with less than 0.1 Ci of {sup 137}Cs and over 85 lb of solid waste contaminated with supernate from normal storage and evaporation operations are nonhazardous. Containers with …

The interaction of tritium with metals is made complex by two phenomena. The first is that the beta decay in the metal produces {sup 3}He. The helium moves to form bubbles. This report shows that growth of the bubbles produces a two-stage swelling of the metal that comes first from the appearance of the helium and second from the relaxation of the lattice disorder. The second phenomena is the steady state ion and free radical concentration in the tritium over gas that interacts with impurities on the metal surface. This report shows that the reaction rates are much faster than for normal hydrogen cleaning.

In the present report, the simultaneous uptake of Cu(II) and Cr(VI) by laboratory-type wetlands has been considered. Two different molar ratios (Cu(II)/Cr(VI)) of 3.8 and 0.46 have been used. Because most oil and gas waste waters are known to contain both cationic and anionic heavy metals in the dissolved form, a study of simultaneous uptake of cationic and anionic heavy metals will be helpful in the design and construction of a wetland treatment system, for such waste waters.

This report addresses the comments on RHIC beam abort sweeper magnet.