Chemical Engineering Division waste management programs quarterly report, April--June 1974

Steindler, M. J.; Levitz, N.M.; Mecham, W.J.; Seefeldt, W.B.; Trevorrow, L. E.; Gerding, T.J.; Kullen, B.; Webster, David; Burris, L.

doi:10.2172/4231999

Cited by 2 publications

(3 citation statements)

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“…a Neutron doses were calculated for the irradiations, using the measured track densities from the standard glass to be 8.1 x lO 1^, 6.1 x 10 20 , and 6.6 x 10 ^ neutrons/m 2 for the three irradiations A, B, and C, respectively. *>At a magnification of 43, the field of view was 0.0266 cm in diameter and corresponded to an area of 5.56 x 10~4 cm 2 . At a magnification of 97, the field of view was 0.0117 cm in diameter with an area of 1.08 x 10~4 cm 2 .…”

Section: E Conclusionmentioning

confidence: 99%

Decontamination of metals containing plutonium and americium

Steindler¹,

Seitz²,

Gerding³

1979

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Melc-slagging (melt-refining) techniques were evaluated as a decontamination and consolidation step for metals contaminated with oxides of plutonium and americium. Experiments were performed in which mild steel, stainless steel, and nickel contaminated with oxides of plutonium and americium were melted in the presence of silicate slags of various compositions. The metal products were low in contamination, with the plutonium and americium strongly fractionated to the slags. Partition coefficients (plutonium in slag/plutonium in steel) of 7 x 10^ were measured with borosilicate slag and of 3 x 10° with calcium, magnesium silicate slag. Decontamination of metals containing as much as 14 000 ppm plutonium appears to be as efficient as for metals with plutonium levels of 400 ppm. Staged extraction, that is, a remelting of processed metal with clean slag, results in further decontamination of the metal. The second extraction is effective with either resistance-furnace melting or electric-arc melting. Slag adhering to the metal ingots and in defects within the ingots is in the important contributors to plutonium retained in processed metals. If these sources of plutonium are controlled, the melt-refining process can be used on a large scale to convert highly contaminated metals to homogeneous and compact forms with very low concentrations of plutonium and americium. A conceptual design of a melt-refining process to decontaminate plutonium-and americium-contaminated metals is described. The process includes single-stage refining of contaminated metals to pr&uuce a metal product which would have less than 10 nCi/g of TRU-element contamination. Two plant sizes were considered. The smaller conceptual plant processes 77 kg of metal per 8-h period and may be portable. The larger one processes 140 kg of metal per 8-h period, is stationary, and may be near the maximum size that is practical for a metal decontamination process.

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Section: E Conclusionmentioning

confidence: 99%

Decontamination of metals containing plutonium and americium

Steindler¹,

Seitz²,

Gerding³

1979

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“…Further discussion concerning the state of stress and hydraulic fracturing is presented below in the section on hydraulic fracturing. 6. Hydrodynamics…”

Section: State Of Stressmentioning

confidence: 99%

“…The heat is transferred through N fins having a thickness d and a thermal conductivity of kF for a distance of rs, the radius of the canister. Thus, Q (6) where l:ITF is the resulting temperature difference between the center line . …”

Section: Iooor------r-----------~------------mentioning

confidence: 99%

Chemical Engineering Division waste management programs. Quarterly report, January--March 1975

Steindler¹,

Levitz²,

Mecham³

et al. 1975

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Warranty. express or implied, m assumes any legal subcontracton, or their employees, makes any lability or responsibility for the accuracy. completeness 0, usefulnen of any information, apparatus. product or WASTE MANAGEMENT PROGRAMS process disclosed. or represents that its use would not infringe priwtety owned rights. Previous reports in this series .. QUARTERLY REPORTJanuary ANL-8106 January-March 1974 ANL-8134April-June 1974 July-September 1974 ANL-75-23 October-December 1974 ' DISTRIBUTION OE THIS DOCUMENT IS UNLIMITED,0$* Ignition Tests with Tubing . THIS PAGE WAS INTENTIONALLY LEFT BLANK. . . . . 2.Ignition Tests with Zircaloy Turnings. . 3.Ignition Tests with Zircaloy Fines . . 4.Ignition Tests on Zinc-Coated Tubing . . . 5.Oxidation of Zircaloy Tubing in Air. 13.14. 15.Well Logging Methods and their Applications. ABSTRACT Development work on the study of consolidation techniques·for Zircaloy fuel-cladding hulls included scouting tests on volatility schemes for separating the zirconium as the volatile tetrachloride and ignition tests on several Zircaloy materials to further characterize the pyrophoric behavior of Zircaloy. All tests were with nonirradiated metal pending_acquisition of irradiated samples. In hydrochlorination runs with anhydrous HCl, analyses of the condensed overhead products and reaction-boat residues tended to confirm the expected behavior of the key elements, and indicate that a highly decontaminated zirconium product and a consolidated plutoniumcontaining fraction may be attainable. Studies on a pyrochemical approach using molten zinc chloride to separate the zirconium as the tetrachloride show that considerable flexibility exists in the choice of salt-to-metal compositions.Small-scale .ignition tests using zirconium igniter powders indicated that Zircaloy tubing, per se, does not exhibit pyrophoricity in air, even at temperatures approaching the melting point of the metal, whereas some types of fines can be ignited with a match.Installation is nearly complete of a glovebox facility for studies on the salvage of alpha-contaminated metals by pyrochemical methods. Steel-melting experiments with ·noncontaminated metal are in progress, using stand-in materials for plutonium. Cqmpatibility of slagging materials and crucible materials is being examined in the initial studies.Disposal of a major portion of fission product tritium formed in light water reactor fuels by deep-well injection of the low-level aqueous waste (LLAW) from plants reprocessing such fuels is. being evaluated. The question of siting is a very important factor in determining the feasibility of this particular disposal option. The influence of geologic and hydrologic considerations in the choice of a disposal well site are reviewed. The various geophysical parameters characterizing the ability of the receiving stratum to hold and to transmit fluids are described. The acquisition of 2 information on these parameters by testing or from records is discussed. The use of geophysical parameters to predict the response of ...

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Chemical Engineering Division waste management programs quarterly report, April--June 1974

Cited by 2 publications

References 0 publications

Decontamination of metals containing plutonium and americium

Decontamination of metals containing plutonium and americium

Chemical Engineering Division waste management programs. Quarterly report, January--March 1975

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