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Investigation of some lanthanide carbon, nitrogen, chalcogen, and halogen systems at elevated temperatures. Progress report, February 1, 1973--January 31, 1974

Description: Progress is reported on studies of the thermodynamic characterizations of the sublimation and vaporization reactions of YbF/sub 2/ and UbF/sub 3/, and preparation phase studies of mixed halides of europium, ytterbium chloride, and lanthanide(III) fluorides. (DHM)
Date: January 1, 1974
Creator: Eick, H A; Luke, H; Biefeld, C G; Biefeld, R M; Clink, B L & Richards, J T
Partner: UNT Libraries Government Documents Department

Californium oxide--palladium cermet wire as a $sup 252$Cf neutron source form

Description: An improved /sup 252/Cf neutron source form has been developed to enhance containment of /sup 252/Cf during production of the sources and to lower the sale price of /sup 252/Cf sources by commercial encapsulators. Process steps are described for preparing califomnium oxide-palladium cermet powder by palladium chemical plating, fabrication of cermet pellets by pressing and sintering, fabrication of bare wire by rolling, and adjustment (reduction) of / sup 256/Cf linear concentration by roll cladding. /sup 252/Cf is distributed uniformly in the wires, which can be made in concentrations suitable for a full range of industrial source strengths (from 1 x 10/sup 7/ to 2.6 x 10/sup 10/ n/ sec). These processes were developed in laboratory tests with stead-ins and /sup 252/Cf tracer, and were demonstrated with milligram quantities of /sup 252/Cf in the Target Fabrication Facility (TFF). Improved wire forming techniques are being developed to manufacture clad wire on a larger scale. (auth)
Date: January 1, 1974
Creator: Mosley, W.C.; McBeath, P.E. & Smith, P.K.
Partner: UNT Libraries Government Documents Department

Separation of $sup 238$Pu from $sup 237$Np by pressurized anion exchange

Description: Pressurized anion exchange with small particle ( ~2OO mesh) Dowex MSA-1 macroporous ion resin gave excellent separation of /sup 238/Pu from /sup 237/Np. Separation was satisfactory with ~9O mesh Dowex 1-X4 gel-type resin at 3 to 4 times the fiow rates normally used in the Savannah River Plant with 40 to 60 mesh Dowex 1 resin. Results wth small-particle Dowex 1-X2 in the pressurized system were not satisfactory because the resin beads deformed due to low structural stabiliiy, with resulting excessive pressure drop and poor separation. Small- particle Dowex 1-X6 was very ineffective because of slow ionic diffusion in the resin matrix. The excellent performance of the macroporous resin is attributed to rapid ionic diffusion resulting from high resin porosity. The pressurized system was Operated safely at temperatures up to 55 deg C and pressures up to 350 psig. (auth)
Date: January 1, 1974
Creator: Burney, G.A. & Thompson, G.H.
Partner: UNT Libraries Government Documents Department

Mercury removal from aqueous process streams

Description: A simple method for removing mercury from aqueous process streams has been developed. The system consists of a column packed with finely ground vulcanized rubber preceded by a liquid cyclone separator. In one test, a pilot- scale packed bed containing finely ground tire rubber produced an effluent having < 10 ppb mercury for 170 bed volumes throughput, and < 100 ppb for over 600 bed volumes. Feed solution contained 1800 to 11,000 ppb mercury in a dissolved or colloidal state. In batch laboratory tests, mercury was reduced from 750 ppb to less than 5 ppb in five minutes at 70 deg C. The ability of rubber to capture mercury in almost any physical or chemical form over a wide range of pH and concentration provides an economical method for cleaning up waste effluent from many industrial sources. This process uses one waste product to control another and at a cost below that of previously described processes. The use of discarded tire rubber to absorb mercury may have wide application. (auth)
Date: January 1, 1974
Creator: Tharin, D.W.
Partner: UNT Libraries Government Documents Department